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HP A5120 EI Series, Command Reference Manual

The HP A5120 EI Series Configuration Manual is a comprehensive user guide for the A5120 EI Series. This manual is essential for understanding and utilizing the product's full potential. Visit manualshive.com to download your free copy of the manual and unleash the power of your HP A5120 EI Series.

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76 

DHCP snooping configuration commands 

  

 

NOTE: 

The DHCP snooping enabled device does not work if it is between the DHCP relay agent and DHCP 
server. It can work when it is between the DHCP client and relay agent or between the DHCP client and 
server. 

 

dhcp-snooping 

Syntax 

dhcp-snooping 

undo dhcp-snooping

 

View 

System view 

Default level 

2: System level 

Parameters 

None 

Description 

Use the 

dhcp-snooping

 command to enable DHCP snooping. 

Use the 

undo dhcp-snooping

 command to disable DHCP snooping. 

With DHCP snooping disabled, all ports can forward responses from any DHCP servers and does not 
record binding information about MAC addresses of DHCP clients and the obtained IP addresses. 

By default, DHCP snooping is disabled. 
Related commands: 

display dhcp-snooping

. 

Examples 

# Enable DHCP snooping. 

<Sysname> system-view 

[Sysname] dhcp-snooping 

dhcp-snooping binding database filename 

Syntax 

dhcp-snooping binding database filename

 

filename

 

undo dhcp-snooping binding database filename 

View 

System view 

Summary of Contents for A5120 EI Series

Page 1: ...ds and command syntax options available for the HP A Series products This document is intended for network planners field technical support and servicing engineers and network administrators who work with HP A Series products Part number 5998 1794 Software version Release 2208 Document version 5W100 20110530 ...

Page 2: ... MATERIAL INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Hewlett Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material The only warranties for HP products and services are set forth in the express warranty statements accompa...

Page 3: ...tion commands 13 display ip interface 13 display ip interface brief 15 ip address 17 DHCP server configuration commands 19 bims server 19 bootfile name 20 dhcp enable 20 dhcp server apply ip pool 21 dhcp select server global pool 21 dhcp server detect 22 dhcp server forbidden ip 23 dhcp server ip pool 24 dhcp server ping packets 24 dhcp server ping timeout 25 dhcp server relay information enable 2...

Page 4: ... id format type 56 dhcp relay information remote id string 57 dhcp relay information strategy 57 dhcp relay release ip 58 dhcp relay security static 59 dhcp relay security refresh enable 59 dhcp relay security tracker 60 dhcp relay server detect 61 dhcp relay server group 61 dhcp relay server select 62 dhcp select relay 63 display dhcp relay 64 display dhcp relay information 64 display dhcp relay ...

Page 5: ...commands 93 display bootp client 93 ip address bootp alloc 94 IPv4 DNS configuration commands 95 display dns domain 95 display dns host 96 display dns server 97 display ip host 98 dns domain 99 dns proxy enable 99 dns resolve 100 dns server 101 dns spoofing 101 ip host 102 reset dns host 103 IPv6 DNS configuration commands 104 display dns ipv6 server 104 display ipv6 host 105 dns server ipv6 106 i...

Page 6: ...mtu 145 display ipv6 socket 146 display ipv6 statistics 148 display tcp ipv6 statistics 151 display tcp ipv6 status 154 display udp ipv6 statistics 155 ipv6 156 ipv6 address 157 ipv6 address anycast 157 ipv6 address auto 158 ipv6 address auto link local 159 ipv6 address eui 64 160 ipv6 address link local 160 ipv6 hoplimit expires enable 161 ipv6 icmp error 162 ipv6 icmpv6 multicast echo reply enab...

Page 7: ...r statistics 188 dns server 190 domain name 191 ipv6 dhcp pool 191 ipv6 dhcp prefix pool 192 ipv6 dhcp server apply pool 193 ipv6 dhcp server enable 194 prefix pool 194 reset ipv6 dhcp server pd in use 195 reset ipv6 dhcp server statistics 196 sip server 196 static bind prefix 197 DHCPv6 relay agent configuration commands 198 display ipv6 dhcp relay server address 198 display ipv6 dhcp relay stati...

Page 8: ...viii Support and other resources 211 Contacting HP 211 Subscription service 211 Related information 211 Documents 211 Websites 211 Conventions 212 Index 214 ...

Page 9: ...heck is enabled Examples Enable ARP entry check Sysname system view Sysname arp check enable arp max learning num Syntax arp max learning num number undo arp max learning num View Ethernet interface view VLAN interface view Layer 2 aggregate interface view Default level 2 System level Parameters number Specifies the maximum number of dynamic ARP entries that an interface can learn in the range 0 t...

Page 10: ...aggregate interface bridge aggregation 1 to learn up to 1000 dynamic ARP entries Sysname system view Sysname interface bridge aggregation 1 Sysname Bridge Aggregation1 arp max learning num 1000 arp static Syntax arp static ip address mac address vlan id interface type interface number undo arp static ip address undo arp ip address View System view Default level 2 System level Parameters ip address...

Page 11: ...rgument Related commands reset arp and display arp Examples Configure a static ARP entry with the IP address being 202 38 10 2 the MAC address being 00e0 fc01 0000 and the outbound interface being GigabitEthernet 1 0 1 of VLAN 10 Sysname system view Sysname arp static 202 38 10 2 00e0 fc01 0000 10 GigabitEthernet 1 0 1 arp timer aging Syntax arp timer aging aging time undo arp timer aging View Sys...

Page 12: ...ce number count Displays the number of ARP entries Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all li...

Page 13: ...ber number of the device in the IRF which you can display with the display irf command The value range for the slot number argument depends on the number of members and numbering conditions in the current IRF If no IRF exists the slot number argument is the current device number If the switch does not support IRF the slot number argument must be 1 Filters command output by specifying a regular exp...

Page 14: ...at matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display arp timer aging command to display the age timer for dyn...

Page 15: ...atic ARP entries slot slot number Clears the ARP entries for the specified device The slot number argument is the member number of the device in the IRF which you can display with the display irf command The value range for the slot number argument depends on the number of members and numbering conditions in the current IRF If no IRF exists the slot number argument is the current device number If ...

Page 16: ...sending gratuitous ARP packets periodically This function takes effect only when the link of the enabled interface goes up and an IP address has been assigned to the interface If you change the interval for sending gratuitous ARP packets the configuration is effective at the next sending interval The frequency of sending gratuitous ARP packets may be much lower than is expected if this function is...

Page 17: ...s arp learning enable View System view Default level 2 System level Parameters None Description Use the gratuitous arp learning enable command to enable the gratuitous ARP packet learning function Use the undo gratuitous arp learning enable command to disable the function By default the function is enabled With this function enabled a switch receiving a gratuitous ARP packet can add the source IP ...

Page 18: ...ines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display local proxy arp command to display the status of the local proxy ARP If no interface is specified the local p...

Page 19: ...terface is specified the proxy ARP status of the specified interface is displayed if no interface is specified the proxy ARP status of all interfaces is displayed Related commands proxy arp enable Examples Display the proxy ARP status on Vlan interface1 Sysname display proxy arp interface Vlan interface 1 Interface Vlan interface1 Proxy ARP status disabled local proxy arp enable Syntax local proxy...

Page 20: ...e Vlan interface2 local proxy arp enable ip range 1 1 1 1 to 1 1 1 20 proxy arp enable Syntax proxy arp enable undo proxy arp enable View VLAN interface view Default level 2 System level Parameters None Description Use the proxy arp enable command to enable proxy ARP Use the undo proxy arp enable command to disable proxy ARP By default proxy ARP is disabled Related commands display proxy arp Examp...

Page 21: ...de Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display ip interface command to display IP configuration information for a specified Layer 3 interface or all Layer 3 interfaces Examples Display IP configuration information for interface VLAN interface 1 Sysname dis...

Page 22: ...can be DOWN Indicates that the protocol state of the interface is down UP Indicates that the protocol state of the interface is up UP spoofing Indicates that the protocol state of the interface pretends to be up however no corresponding link is present or the corresponding link is not present permanently but is established as needed Internet Address IP address of an interface followed by Primary I...

Page 23: ...ng the following packets Echo reply packets Unreachable packets Source quench packets Routing redirect packets Echo request packets Router advertisement packets Router solicitation packets Time exceeded packets IP header bad packets Timestamp request packets Timestamp reply packets Information request packets Information reply packets Netmask request packets Netmask reply packets Unknown type pack...

Page 24: ...ng Interface Physical Protocol IP Address Description Vlan interface1 up up 6 6 6 6 Vlan inte Vlan interface2 up up 7 7 7 7 Vlan inte Table 3 Output description Field Description down administratively down The interface is administratively shut down with the shutdown command s spoofing Spoofing attribute of the interface It indicates that an interface whose link layer protocol is displayed up may ...

Page 25: ...rom the interface Use the undo ip address ip address mask mask length command to remove the primary IP address Use the undo ip address ip address mask mask length sub command to remove a secondary IP address By default no IP address is assigned to any interface When assigning IP addresses to an interface consider the following You can assign only one primary IP address to an interface The primary ...

Page 26: ...18 Sysname Vlan interface1 ip address 202 38 160 1 255 255 255 0 sub ...

Page 27: ... BIMS server which is a string of 1 to 16 characters Description Use the bims server command to specify the IP address port number and shared key of the BIMS server in the DHCP address pool for the client Use the undo bims server command to remove the specified BIMS server information By default no BIMS server information is specified If you execute the bims server command repeatedly the latest co...

Page 28: ...t no bootfile name is specified If you execute the bootfile name command repeatedly the latest configuration will overwrite the previous one Related commands dhcp server ip pool and display dhcp server tree Examples Specify the bootfile name aaa cfg in DHCP address pool 0 Sysname system view Sysname dhcp server ip pool 0 Sysname dhcp pool 0 bootfile name aaa cfg dhcp enable Syntax dhcp enable undo...

Page 29: ...nded address pool is applied on an interface and the server assigns an IP address from a common address pool to a client when the client s request arrives at the interface If you execute the dhcp server apply ip pool command on an interface when a client s request arrives at the interface the server attempts to assign the client the statically bound IP address first and then an IP address from thi...

Page 30: ... Description Use the dhcp select server global pool command to enable the DHCP server on specified interface s After the interface receives a DHCP request from a client the DHCP server will allocate an IP address from the address pool Use the undo dhcp select server global pool command to remove the configuration Upon receiving a DHCP request from a client the interface will neither assign an IP a...

Page 31: ...ddress of the IP address range to be excluded from dynamic allocation high ip address Specifies the end IP address of the IP address range to be excluded from dynamic allocation The end IP address must have a higher sequence than the start one Description Use the dhcp server forbidden ip command to exclude IP addresses from dynamic allocation Use the undo dhcp server forbidden ip command to remove...

Page 32: ...ress pool name which is a unique pool identifier a string of 1 to 35 characters extended Specifies the address pool as an extended address pool If this keyword is not specified the address pool is a common address pool Description Use the dhcp server ip pool command to create a DHCP address pool and enter its view If the pool was created you will directly enter its view Use the undo dhcp server ip...

Page 33: ...nother IP address If not the server pings the IP addresses once again until the specified number of ping packets are sent If still no response is received the server assigns the IP address to the requesting client Examples Specify the maximum number of ping packets as 10 Sysname system view Sysname dhcp server ping packets 10 dhcp server ping timeout Syntax dhcp server ping timeout milliseconds un...

Page 34: ...t 1000 dhcp server relay information enable Syntax dhcp server relay information enable undo dhcp server relay information enable View System view Default level 2 System level Parameters None Description Use the dhcp server relay information enable command to enable the DHCP server to handle Option 82 Use the undo dhcp server relay information enable command to configure the DHCP server to ignore ...

Page 35: ...the dhcp server threshold command to enable the DHCP server to send trap messages to the network management server when the specified threshold is reached Use the undo dhcp server threshold command to restore the default By default the DHCP server does not send trap messages to the network management server Examples Enable the DHCP server to send trap messages to the network management server when...

Page 36: ...lated commands reset dhcp server conflict Examples Display information about all IP address conflicts Sysname display dhcp server conflict all Address Discover time 4 4 4 1 Apr 25 2007 16 57 20 4 4 4 2 Apr 25 2007 17 00 10 total 2 entry Table 4 Output description Field Description Address Conflicted IP address Discover Time Time when the conflict was discovered display dhcp server expired Syntax d...

Page 37: ...r all addresses have been assigned Examples Display information about lease expirations in all DHCP address pools Sysname display dhcp server expired all IP address Client identifier Lease expiration Type Hardware address 4 4 4 6 3030 3066 2e65 3230 Apr 25 2007 17 10 47 Release 302e 3130 3234 2d45 7468 6572 6e65 7430 2f31 total 1 entry Table 5 Output description Field Description IP address Expire...

Page 38: ...expression View Any view Default level 1 Monitor level Parameters Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include ...

Page 39: ...specified the binding information of all address pools is displayed Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression includ...

Page 40: ...d IP address Bound IP address Client identifier Hardware address Client s ID or MAC of the binding Lease expiration Lease expiration time which can be Specific time May 1 2009 14 02 49 in this example Time when the lease expires NOT Used The IP address of the static binding has not been assigned to the specific client Unlimited Infinite lease expiration time Type Binding types Manual Static bindin...

Page 41: ...cs of the DHCP server Related commands reset dhcp server statistics Examples Display the statistics on the DHCP server Sysname display dhcp server statistics Global Pool Pool Number 1 Binding Auto 1 Manual 0 Expire 0 BOOTP Request 10 DHCPDISCOVER 5 DHCPREQUEST 3 DHCPDECLINE 0 DHCPRELEASE 2 DHCPINFORM 0 BOOTPREQUEST 0 BOOTP Reply 6 DHCPOFFER 3 DHCPACK 3 DHCPNAK 0 BOOTPREPLY 0 Bad Messages 0 Table 8...

Page 42: ...d address pool The pool name argument is a string of 1 to 35 characters If no pool name is specified information of all address pools will be displayed Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow ...

Page 43: ...k 255 0 0 0 static bind mac address 00e0 00fc 0001 The IP address and MAC address of the static binding Sibling node The sibling node of the current node nodes of this kind in the output information include Child node The child node subnet segment address pool of the current node Parent node The parent node nature network segment address pool of the current node Sibling node The latter sibling nod...

Page 44: ...es to be removed Description Use the dns list command to specify DNS server addresses in a DHCP address pool Use the undo dns list command to remove DNS server addresses from a DHCP address pool By default no DNS server address is specified If you repeatedly use the dns list command the latest configuration will overwrite the previous one Related commands dhcp server ip pool and display dhcp serve...

Page 45: ... hour hour minute minute second second unlimited undo expired View DHCP address pool view Default level 2 System level Parameters day day Specifies the number of days in the range 0 to 365 hour hour Specifies the number of hours in the range 0 to 23 minute minute Specifies the number of minutes in the range 0 to 59 second second Specifies the number of seconds in the range 0 to 59 unlimited Specif...

Page 46: ...d address pool Use the undo forbidden ip command to cancel specified or all excluded IP addresses By default all IP addresses in an extended address pool are assignable except the IP addresses of the DHCP server interfaces NOTE Only the extended address pools support this command IP addresses specified with the forbidden ip command in DHCP address pool view are excluded from dynamic address alloca...

Page 47: ...om a DHCP address pool By default no gateway address is specified If you use the gateway list command repeatedly the latest configuration will overwrite the previous one Related commands dhcp server ip pool and display dhcp server tree Examples Specify the gateway address 10 1 10 1 99 in DHCP address pool 0 Sysname system view Sysname dhcp server ip pool 0 Sysname dhcp pool 0 gateway list 10 110 1...

Page 48: ...he message p node Peer to peer node A p node client sends the destination name in a unicast message to the WINS server and the WINS server returns the mapping to the client m node Mixed node a combination of a b node first and p node second An m node client broadcasts the destination name if there is no response and then unicasts the destination name to the WINS server to get the mapping h node Hy...

Page 49: ... range for dynamic allocation in a DHCP address pool Use the undo network command to remove the specified address range No IP address range is specified by default You can specify only one network segment for each common address pool If you use the network command repeatedly the latest configuration will overwrite the previous one Related commands dhcp server ip pool and display dhcp server tree E...

Page 50: ...latest configuration will overwrite the previous one Related commands dhcp server ip pool and display dhcp server tree Examples Specify 192 168 8 1 through 192 168 8 150 as the address range for dynamic allocation in extended address pool 0 Sysname system view Sysname dhcp server ip pool 0 extended Sysname dhcp pool 0 network ip range 192 168 8 1 192 168 8 150 network mask Syntax network mask mask...

Page 51: ... excluding 12 50 to 55 57 to 61 and 82 ascii ascii string Specifies an ASCII string with 1 to 255 characters hex hex string 1 16 Specifies hex digit strings 1 16 indicates that you can specify up to 16 hex digit strings separated by spaces Each string contains 2 4 6 or 8 hex digits ip address ip address 1 8 Specifies IP addresses 1 8 indicates that you can specify up to eight IP addresses separate...

Page 52: ... server ip in use all ip ip address pool pool name View User view Default level 2 System level Parameters all Clears the IP address dynamic binding information of all DHCP address pools ip ip address Clears the dynamic binding information of a specified IP address pool pool name Clears the dynamic binding information of a specified address pool The pool name is a string of 1 to 35 characters If no...

Page 53: ...th 4 to 160 characters in the format of H H H each H indicates 4 hex digits except the last H indicates 2 or 4 hex digits For example aabb cccc dd is a valid ID but aabb c dddd and aabb cc dddd are both invalid Description Use the static bind client identifier command to specify the client ID of a static binding in a DHCP address pool Use the undo static bind client identifier command to remove th...

Page 54: ...the natural mask is used mask length Specifies the mask length of the IP address which is the number of 1s in the mask in the range 0 to 32 mask mask Specifies the IP address mask in dotted decimal format Description Use the static bind ip address command to specify an IP address in a DHCP address pool for a static binding Use the undo static bind ip address command to remove the statically bound ...

Page 55: ...do static bind mac address command to remove the statically bound MAC address By default no MAC address is statically bound Use the static bind mac address command together with the static bind ip address command to complete a static binding configuration If you use the static bind mac address or static bind client identifier command repeatedly the latest configuration will overwrite the previous ...

Page 56: ...es Specify the TFTP server name as aaa in DHCP address pool 0 Sysname system view Sysname dhcp server ip pool 0 Sysname dhcp pool 0 tftp server domain name aaa tftp server ip address Syntax tftp server ip address ip address undo tftp server ip address View DHCP address pool view Default level 2 System level Parameters ip address Specifies the TFTP server IP address Description Use the tftp server ...

Page 57: ...tifier command to specify an IP address range for the DHCP clients of a specified vendor Use the undo vendor class identifier command to restore the default By default no IP address range is specified for the DHCP clients of any vendor After this feature is configured in an extended DHCP address pool the DHCP server when using the extended DHCP address pool to assign an IP address to a DHCP client...

Page 58: ...LAN ID meaning DHCP clients will not take this ID as their voice VLAN enable Enables the specified voice VLAN ID meaning DHCP clients will take this ID as their voice VLAN Description Use the voice config command to configure specified Option 184 contents in a DHCP address pool Use the undo voice config command to remove specified Option 184 contents from a DHCP address pool By default no Option 1...

Page 59: ...cord clients IP to MAC bindings after clients get IP addresses through DHCP It also supports static bindings you can manually configure IP to MAC bindings on the DHCP relay agent so that users can access external networks using fixed IP addresses Upon receiving an ARP packet the DHCP relay agent matches the sender s IP and MAC addresses in the packet against the bindings both dynamic and static If...

Page 60: ...rame If they are the same the DHCP relay agent decides this request as valid and forwards it to the DHCP server if not the DHCP request is discarded DHCP relay agents change the source MAC addresses when forwarding DHCP packets Therefore you can enable MAC address check only on a DHCP relay agent directly connected to the DHCP clients Otherwise valid DHCP packets may be discarded and clients canno...

Page 61: ...em level Parameters ascii Specifies the code type for the circuit ID sub option as ascii hex Specifies the code type for the circuit ID sub option as hex Description Use the dhcp relay information circuit id format type command to configure the code type for the non user defined circuit ID sub option Use the undo dhcp relay information circuit id format type command to restore the default By defau...

Page 62: ...id string command to restore the default By default the padding content for the circuit ID sub option depends on the padding format of Option 82 After you configure the padding content for the circuit ID sub option using this command ASCII is adopted as the code type Related commands dhcp relay information format and display dhcp relay information Examples Configure the padding content for the cir...

Page 63: ...e node identifier View Interface view Default level 2 System level Parameters normal Specifies the normal padding format verbose Specifies the verbose padding format node identifier mac sysname user defined node identifier Specifies the access node identifier By default the node MAC address is used as the node identifier mac indicates using MAC address as the node identifier sysname indicates usin...

Page 64: ...place Sysname Vlan interface1 dhcp relay information format verbose dhcp relay information remote id format type Syntax dhcp relay information remote id format type ascii hex undo dhcp relay information remote id format type View Interface view Default level 2 System view Parameters ascii Specifies the code type for the remote ID sub option as ascii hex Specifies the code type for the remote ID su...

Page 65: ...ontent for the remote ID sub option depends on the padding format of Option 82 After you configure the padding content for the remote ID sub option using this command ASCII is adopted as the code type NOTE If you want to specify the character string sysname a case sensitive character string as the padding content for the remote ID sub option you need to use quotation marks to make it take effect F...

Page 66: ...gy The handling strategy for messages containing Option 82 defaults to replace Related commands display dhcp relay information Examples Configure the DHCP relay agent handling strategy for messages containing Option 82 as keep Sysname system view Sysname interface vlan interface 1 Sysname Vlan interface1 dhcp relay information enable Sysname Vlan interface1 dhcp relay information strategy keep dhc...

Page 67: ...he dhcp relay security static command to configure a static client entry which is the binding between IP address MAC address and Layer 3 interface on the relay agent Use the undo dhcp relay security command to remove specified client entries from the relay agent No manual client entry is configured on the DHCP relay agent by default When using the dhcp relay security static command to bind an inte...

Page 68: ...the DHCP relay agent from periodically refreshing dynamic client entries Sysname system view Sysname undo dhcp relay security refresh enable dhcp relay security tracker Syntax dhcp relay security tracker interval auto undo dhcp relay security tracker interval View System view Default level 2 System level Parameters interval Specifies the refreshing interval in seconds in the range 1 to 120 auto Sp...

Page 69: ... is disabled With this function enabled upon receiving a DHCP request the DHCP relay agent will record from the request the IP addresses of all DHCP servers that ever offered IP addresses to the DHCP client and the receiving interface Each server detected is recorded only once The administrator can get this information from logs to check out unauthorized DHCP servers After the information of recor...

Page 70: ...a server group has been correlated to multiple interfaces you need to cancel these correlations before removing the server group Related commands display dhcp relay server group Examples Specify DHCP server 1 1 1 1 for DHCP server group 1 on the relay agent Sysname system view Sysname dhcp relay server group 1 ip 1 1 1 1 dhcp relay server select Syntax dhcp relay server select group id undo dhcp r...

Page 71: ...e the dhcp select relay command to enable the relay agent on the current interface Upon receiving requests from an enabled interface the relay agent will forward these requests to outside DHCP servers for IP address allocation Use the undo dhcp select relay command to restore the default After DHCP is enabled the DHCP server is enabled on an interface by default Upon receiving a client s request f...

Page 72: ...that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display dhcp relay command to display information about DHCP server groups correlated to an interface or all interfaces Ex...

Page 73: ...sion a case sensitive string of 1 to 256 characters Description Use the display dhcp relay information command to display Option 82 configuration information on the DHCP relay agent Examples Display the Option 82 configuration information of all interfaces Sysname display dhcp relay information all Interface Vlan interface100 Status Enable Strategy Replace Format Verbose Circuit ID format type HEX...

Page 74: ...ic bindings Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular ex...

Page 75: ...iguration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display dhcp rel...

Page 76: ...pecified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display dhcp relay security tracker command to display the interval for refreshi...

Page 77: ... to 256 characters Description Use the display dhcp relay server group command to display the configuration information of a specified DHCP server group or all DHCP server groups Examples Display IP addresses of DHCP servers in DHCP server group 1 Sysname display dhcp relay server group 1 No Group IP 1 1 1 1 1 2 1 1 1 2 Table 14 Output description Field Description No Sequence number Group IP IP a...

Page 78: ...lay all DHCP packet statistics on the relay agent Sysname display dhcp relay statistics Bad packets received 0 DHCP packets received from clients 0 DHCPDISCOVER packets received 0 DHCPREQUEST packets received 0 DHCPINFORM packets received 0 DHCPRELEASE packets received 0 DHCPDECLINE packets received 0 BOOTPREQUEST packets received 0 DHCP packets received from servers 0 DHCPOFFER packets received 0...

Page 79: ...r Client DHCPOFFER 0 DHCPACK 0 DHCPNAK 0 BOOTPREPLY 0 reset dhcp relay statistics Syntax reset dhcp relay statistics server group group id View User view Default level 1 Monitor level Parameters server group group id Specifies the number in the range 0 to 19 of a server group about which to remove statistics from the relay agent Description Use the reset dhcp relay statistics command to remove sta...

Page 80: ...n For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case se...

Page 81: ...ent information Information of the interface acting as the DHCP client Current machine state Current state of the DHCP client which can be HALT Indicates that the client stops applying for an IP address INIT Indicates the initialization state SELECTING Indicates that the client has sent out a DHCP DISCOVER message in search of a DHCP server and is waiting for the response from DHCP servers REQUEST...

Page 82: ...ient identifier mac interface type interface number undo ip address dhcp alloc View Interface view Default level 2 System level Parameters client identifier mac interface type interface number Specifies the MAC address of an interface to be used as the client ID to obtain an IP address Description Use the ip address dhcp alloc command to configure an interface to use DHCP for IP address acquisitio...

Page 83: ...75 Sysname Vlan interface1 ip address dhcp alloc ...

Page 84: ...ooping command to enable DHCP snooping Use the undo dhcp snooping command to disable DHCP snooping With DHCP snooping disabled all ports can forward responses from any DHCP servers and does not record binding information about MAC addresses of DHCP clients and the obtained IP addresses By default DHCP snooping is disabled Related commands display dhcp snooping Examples Enable DHCP snooping Sysname...

Page 85: ...e system view Sysname dhcp snooping binding database filename database dhcp dhcp snooping binding database update interval Syntax dhcp snooping binding database update interval minutes undo dhcp snooping binding database update interval View System view Default level 2 System level Parameters minutes Specifies the refresh interval in minutes in the range 1 to 14 400 Description Use the dhcp snoopi...

Page 86: ...ase update now command to store DHCP snooping entries to the file DHCP snooping entries will be stored to the file each time this command is used This command takes effect only when the DHCP snooping entry file is specified Related commands dhcp snooping binding database filename Examples Store DHCP snooping entries to the file Sysname system view Sysname dhcp snooping binding database update now ...

Page 87: ...r 2 Ethernet interface view Layer 2 aggregate interface view Default level 2 System level Parameters None Description Use the dhcp snooping check request message command to enable DHCP REQUEST message check of DHCP snooping Use the undo dhcp snooping check request message command to disable DHCP REQUEST message check of the DHCP snooping By default this function is disabled With this function enab...

Page 88: ... default By default the code type for the circuit ID sub option depends on the padding format of Option 82 Each field has its own code type This command applies to configuring the non user defined circuit ID sub option only After you configure the padding content for the circuit ID sub option using the dhcp snooping information circuit id string command ASCII is adopted as the code type Related co...

Page 89: ...VLANs The former case has a higher priority The circuit ID sub option specified for a VLAN will be padded for packets within the VLAN Related commands dhcp snooping information format and display dhcp snooping information Examples Configure the global padding content for the user defined circuit ID sub option as company001 Sysname system view Sysname interface GigabitEthernet 1 0 1 Sysname Gigabit...

Page 90: ...er indicates using a specified character string as the node identifier in which node identifier is a string of 1 to 50 characters Description Use the dhcp snooping information format command to specify the padding format for Option 82 Use the undo dhcp snooping information format command to restore the default By default the padding format for Option 82 is normal When you use the undo dhcp snoopin...

Page 91: ...b option is HEX This command applies only to configuring a non user defined remote ID sub option only After you configure the padding content for the remote ID sub option using the dhcp snooping information remote id string command ASCII is adopted as the code type Related commands display dhcp snooping information Examples Configure the code type for the non user defined remote ID sub option as a...

Page 92: ...ou want to specify the character string sysname a case sensitive character string as the padding content for the remote ID sub option you need to use quotation marks to make it take effect For example if you want to specify Sysname as the padding content for the remote ID sub option you need to enter the dhcp relay information remote id string Sysname command Related commands dhcp snooping informa...

Page 93: ...p snooping rate limit Syntax dhcp snooping rate limit rate undo dhcp snooping rate limit View Layer 2 Ethernet interface view Layer 2 aggregate interface view Default level 2 System level Parameters rate Specifies the maximum rate of incoming DHCP packets in the range 64 to 512 Kbps Description Use the dhcp snooping rate limit command to configure the maximum rate of incoming DHCP packets Use the ...

Page 94: ...o record the IP to MAC bindings of clients Sysname system view Sysname interface GigabitEthernet 1 0 1 Sysname GigabitEthernet1 0 1 dhcp snooping trust display dhcp snooping Syntax display dhcp snooping ip ip address begin exclude include regular expression View Any view Default level 1 Monitor level Parameters ip ip address Displays the DHCP snooping entries corresponding to the specified IP addr...

Page 95: ...tic IP to MAC binding Static IP to MAC bindings are not supported R Specifies that the DHCP snooping entry is being restored through the DHCP snooping entry file and the interface in the entry is invalid IP Address IP address assigned to the DHCP client MAC Address MAC address of the DHCP client Lease Lease period left in seconds VLAN Outer VLAN tag when DHCP snooping and QinQ are both enabled or ...

Page 96: ...nding database File name flash database dhcp Update interval 10 minutes Latest read time Jul 15 2008 16 38 22 Latest write time Jul 15 2008 16 38 24 Status Last write succeeded Table 17 Output description Field Description File name File name Update interval Interval at which the DHCP snooping entry file is refreshed Latest read time The last time when the file is read Latest write time The last t...

Page 97: ...on information on the DHCP snooping device Examples Display the Option 82 configuration information of all interfaces Sysname display dhcp snooping information all Interface GigabitEthernet 1 0 1 Status Enable Strategy Replace Format Verbose Circuit ID format type HEX Remote ID format type ASCII Node identifier aabbcc User defined Circuit ID company001 Interface GigabitEthernet 1 0 2 Status Disabl...

Page 98: ... snooping device On a device in IRF executing the display dhcp snooping packet statistics command without the slot keyword only displays DHCP packet statistics on the device where the command is executed Related commands reset dhcp snooping packet statistics Examples Display DHCP packet statistics on the DHCP snooping device Sysname display dhcp snooping packet statistics DHCP packets received 100...

Page 99: ...and port GigabitEthernet 1 0 1 is trusted reset dhcp snooping Syntax reset dhcp snooping all ip ip address View User view Default level 1 Monitor level Parameters all Clears all DHCP snooping entries ip ip address Clears the DHCP snooping entries of the specified IP address Description Use the reset dhcp snooping command to clear DHCP snooping entries Related commands display dhcp snooping Example...

Page 100: ...the slot number argument represents the device ID If the switch does not support IRF the slot number argument must be 1 Description Use the reset dhcp snooping packet statistics command to clear DHCP packet statistics on the DHCP snooping device Related commands display dhcp snooping packet statistics Examples Clear DHCP packet statistics on the DHCP snooping device Sysname reset dhcp snooping pac...

Page 101: ...es the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display bootp client command to display related information about a BOOT...

Page 102: ...P client will drop the BOOTP response Mac Address MAC address of a BOOTP client ip address bootp alloc Syntax ip address bootp alloc undo ip address bootp alloc View Interface view Default level 2 System level Parameters None Description Use the ip address bootp alloc command to enable an interface to obtain an IP address through BOOTP Use the undo ip address bootp alloc command to disable the int...

Page 103: ...exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display dns domain command to display the domain name suffixes Related commands dns domain Examples Display domain name suffixes Sysna...

Page 104: ...see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description...

Page 105: ...plays the DNS server information dynamically obtained through DHCP or other protocols Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular...

Page 106: ...the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display ip host command to display the host names and corresponding IPv4 ad...

Page 107: ...ers Description Use the dns domain command to configure a domain name suffix The system can automatically add the suffix to part of the domain name you entered for resolution Use the undo dns domain command to delete a domain name suffix with a domain name suffix specified or all domain name suffixes with no domain name suffix specified No domain name suffix is configured by default Only the provi...

Page 108: ...w Sysname dns proxy enable dns resolve Syntax dns resolve undo dns resolve View System view Default level 2 System level Parameters None Description Use the dns resolve command to enable dynamic domain name resolution Use the undo dns resolve command to disable dynamic domain name resolution Dynamic domain name resolution is disabled by default This command is applicable to both IPv4 DNS and IPv6 ...

Page 109: ...ust be within six Running the undo dns server command in system view will delete all DNS servers configured in system view and interface view Running the undo dns server ip address command in system view or interface view will delete the specific DNS server in system view or interface view The DNS server configured in system view has a higher priority than the DNS server configured in interface vi...

Page 110: ... you repeatedly execute the dns spoofing command with different IP addresses specified the latest configuration will overwrite the previous one Examples Enable DNS spoofing and specify the IP address as 1 1 1 1 Sysname system view Sysname dns spoofing 1 1 1 1 ip host Syntax ip host hostname ip address undo ip host hostname ip address View System view Default level 2 System level Parameters hostnam...

Page 111: ... ipv6 Clears the dynamic cache information of type AAAA queries A type AAAA query resolves a domain name to the mapped IPv6 address naptr Clears the dynamic cache information of NAPTR queries A NAPTR query offers the replacement rule of a character string to convert the character string to a domain name srv Clears the dynamic cache information of SRV queries An SRV query offers the domain name of ...

Page 112: ...gular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display dns ipv6 server command to display IPv6 DNS server information Examples Display IPv6 DNS server information Sysname display dns ipv6 server Type D Dynamic S Static DNS Server Type IPv6 Ad...

Page 113: ...ression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display ipv6 host command to display the mappings between host names and IPv6 addresses in the static domain name resolution table Related commands ipv6 host Examples Display the mappings between host nam...

Page 114: ...r By default no DNS server is configured You can configure a maximum of six DNS servers including those with IPv4 addresses Examples Specify a DNS server at 2002 1 Sysname system view Sysname dns server ipv6 2002 1 ipv6 host Syntax ipv6 host hostname ipv6 address undo ipv6 host hostname ipv6 address View System view Default level 2 System level Parameters hostname Specifies the host name a string ...

Page 115: ...only one IPv6 address The IPv6 address you last assign to the host name will overwrite the previous one if there is any Related commands display ipv6 host Examples Configure the mapping between a host name and an IPv6 address Sysname system view Sysname ipv6 host aaa 2001 1 ...

Page 116: ...ut regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256...

Page 117: ...ag U Useable G Gateway H Host B Blackhole D Dynamic S Static R Relay Destination Mask Nexthop Flag OutInterface InnerLabel Token 10 2 1 1 32 127 0 0 1 UH InLoop0 Null Invalid 127 0 0 0 8 127 0 0 1 U InLoop0 Null Invalid 127 0 0 1 32 127 0 0 1 UH InLoop0 Null Invalid Display FIB information passing the IP prefix list abc0 Sysname system view Sysname ip ip prefix abc0 permit 10 2 0 0 16 Sysname disp...

Page 118: ...regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 ch...

Page 119: ...t IRF the slot number argument must be 1 Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that m...

Page 120: ...meter problem packets timestamp Number of input output time stamp packets information request Number of input information request packets mask requests Number of input output mask requests mask replies Number of input output mask replies information reply Number of output information reply packets time exceeded Number of input output expiration packets display ip socket Syntax display ip socket so...

Page 121: ...xamples Display the TCP socket information Sysname display ip socket SOCK_STREAM Task VTYD 38 socketid 1 Proto 6 LA 0 0 0 0 23 FA 0 0 0 0 0 sndbuf 8192 rcvbuf 8192 sb_cc 0 rb_cc 0 socket option SO_ACCEPTCONN SO_KEEPALIVE SO_REUSEPORT SO_SETKEEPALIVE socket state SS_PRIV SS_ASYNC Task HTTP 36 socketid 1 Proto 6 LA 0 0 0 0 80 FA 0 0 0 0 0 sndbuf 8192 rcvbuf 8192 sb_cc 0 rb_cc 0 socket option SO_ACCE...

Page 122: ...RDSO 56 socketid 1 Proto 17 LA 0 0 0 0 1024 FA 0 0 0 0 0 sndbuf 9216 rcvbuf 41600 sb_cc 0 rb_cc 0 socket option SO_UDPCHECKSUM socket state SS_PRIV Task TRAP 52 socketid 1 Proto 17 LA 0 0 0 0 1025 FA 0 0 0 0 0 sndbuf 9216 rcvbuf 0 sb_cc 0 rb_cc 0 socket option SO_UDPCHECKSUM socket state SS_PRIV Task RDSO 56 socketid 2 Proto 17 LA 0 0 0 0 1812 FA 0 0 0 0 0 sndbuf 9216 rcvbuf 41600 sb_cc 0 rb_cc 0 ...

Page 123: ... socket state SS_PRIV SS_NBIO SS_ASYNC Table 27 Output description Field Description SOCK_STREAM TCP socket SOCK_DGRAM UDP socket SOCK_RAW Raw IP socket Task Task number socketid Socket ID Proto Protocol number of the socket indicating the protocol type that IP carries LA Local address and local port number FA Remote address and remote port number sndbuf Sending buffer size of the socket in bytes ...

Page 124: ...xpression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display ip statistics command to display statistics of IP packets Related commands display ip interface and reset ip statistics Examples Display statistics of IP packets Sysname display ip statistics Input sum 7120 local 112 bad protocol 0 bad format 0 bad checksum 0 bad options 0 Output for...

Page 125: ...expression View Any view Default level 1 Monitor level Parameters Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include ...

Page 126: ...ckets dropped with MD5 authentication 0 Packets permitted with MD5 authentication 0 Table 29 Output description Field Description Received packets Total Total number of packets received packets in sequence Number of packets arriving in sequence window probe packets Number of window probe packets received window update packets Number of window update packets received checksum error Number of checks...

Page 127: ...e Number of keepalive probe packets sent Keepalive timeout so connections disconnected Number of connections broken due to timeout of the keepalive timer Initiated connections Number of connections initiated accepted connections Number of connections accepted established connections Number of connections established Closed connections Number of connections closed in brackets are connections closed...

Page 128: ...ed input socket full 0 input packets missing pcb cache 0 Sent packets Total 0 Table 30 Output description Field Description Received packets Total Total number of UDP packets received checksum error Total number of packets with incorrect checksum shorter than header Number of packets with data shorter than head data length larger than packet Number of packets with data longer than packet unicast n...

Page 129: ...rding directed broadcasts to a directly connected network Examples Enable VLAN interface 2 to forward the directed broadcasts to a directly connected network matching ACL 2001 Sysname system view Sysname interface vlan interface 2 Sysname Vlan interface2 ip forward broadcast acl 2001 ip forward broadcast system view Syntax ip forward broadcast undo ip forward broadcast View System view Default lev...

Page 130: ...sending of ICMP redirect packets Sysname system view Sysname ip redirects enable ip ttl expires enable Syntax ip ttl expires enable undo ip ttl expires View System view Default level 2 System level Parameters None Description Use the ip ttl expires enable command to enable sending of ICMP timeout packets Use the undo ip ttl expires command to disable sending of ICMP timeout packets Sending ICMP ti...

Page 131: ...unreachable packets is disabled by default Examples Enable sending of ICMP destination unreachable packets Sysname system view Sysname ip unreachables enable reset ip statistics Syntax reset ip statistics slot slot number View User view Default level 2 System level Parameters slot slot number Clears IP packet statistics on the specified device If the device is in an IRF the slot number argument re...

Page 132: ...tion Use the reset tcp statistics command to clear statistics of TCP traffic Related commands display tcp statistics Examples Display statistics of TCP traffic Sysname reset tcp statistics reset udp statistics Syntax reset udp statistics View User view Default level 2 System level Parameters None Description Use the reset udp statistics command to clear statistics of UDP traffic Examples Display s...

Page 133: ...rmined by the following formula Actual length of the finwait timer Configured length of the finwait timer 75 configured length of the synwait timer Related commands tcp timer syn timeout and tcp window Examples Set the length of the TCP finwait timer to 800 seconds Sysname system view Sysname tcp timer fin timeout 800 tcp timer syn timeout Syntax tcp timer syn timeout time value undo tcp timer syn...

Page 134: ...view Default level 2 System level Parameters window size Specifies the size of the send receive buffer in the range 1 to 32 KB Description Use the tcp window command to configure the size of the TCP send receive buffer Use the undo tcp window command to restore the default The size of the TCP send receive buffer is 8 KB by default Related commands tcp timer fin timeout and tcp timer syn timeout Ex...

Page 135: ...IRDP configuration takes effect only when IRDP is enabled Examples Enable IRDP on VLAN interface 1 Sysname system view Sysname interface vlan interface 1 Sysname Vlan interface1 ip irdp ip irdp address Syntax ip irdp address ip address preference undo ip irdp address ip address View Interface view Default level 2 System level Parameters ip address Specifies the proxy advertised IP address preferen...

Page 136: ... addresses advertised on the interface in the range 4 to 9000 seconds Description Use the ip irdp lifetime command to set the lifetime of IP addresses advertised on an interface Use the undo ip irdp lifetime command to restore the default By default the lifetime is 1800 seconds The lifetime of IP addresses cannot be shorter than the maximum advertising interval on an interface Otherwise a configur...

Page 137: ... times the maximum interval Related commands ip irdp lifetime and ip irdp minadvinterval Examples Set the maximum advertising interval on VLAN interface 1 to 500 seconds Sysname system view Sysname interface vlan interface 1 Sysname Vlan interface1 ip irdp maxadvinterval 500 ip irdp minadvinterval Syntax ip irdp minadvinterval interval value undo ip irdp minadvinterval View Interface view Default ...

Page 138: ... interface Use the undo ip irdp multicast command to restore the default By default the destination IP address is 255 255 255 255 Examples Specify the multicast address 224 0 0 1 as the destination IP address for VLAN interface 1 to send RAs Sysname system view Sysname interface vlan interface 1 Sysname Vlan interface1 ip irdp multicast ip irdp preference Syntax ip irdp preference preference value...

Page 139: ...e interface Use the undo ip irdp preference command to restore the default By default the preference of advertised IP addresses is 0 Examples Configure preference 1 for IP addresses advertised on VLAN interface 1 Sysname system view Sysname interface vlan interface 1 Sysname Vlan interface1 ip irdp preference 1 ...

Page 140: ...l lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display udp helper server command to display the information of forwarded UDP packets on the specified interface or all interfaces If interface type interface number is not specified this command displays the information of forward...

Page 141: ...stem level Parameters None Description Use the udp helper enable command to enable UDP Helper The switch enabled with UDP Helper functions as a relay agent that converts UDP broadcast packets into unicast packets and forwards them to a specified destination server Use the undo udp helper enable command to disable UDP Helper By default UDP Helper is disabled Examples Enable UDP Helper Sysname syste...

Page 142: ...ice data packets The corresponding UDP port number is 37 Description Use the udp helper port command to enable the forwarding of packets with the specified UDP port number Use the undo udp helper port command to remove the configured UDP port numbers By default no UDP port number is specified The specified UDP port numbers will all be removed if UDP Helper is disabled Examples Forward broadcast pa...

Page 143: ...ace Without the ip address argument the undo udp helper server command removes all the destination servers on an interface Related commands display udp helper server Examples Specify the IP address of the destination server as 192 1 1 2 on the interface VLAN interface 100 Sysname system view Sysname interface vlan interface 100 Sysname Vlan interface100 udp helper server 192 1 1 2 ...

Page 144: ...ut regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256...

Page 145: ...begin exclude include regular expression View Any view Default level 1 Monitor level Parameters interface type Specifies the interface type interface number Specifies the interface number verbose Displays the detailed IPv6 information of an interface Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide beg...

Page 146: ...nterface2 current state UP Line protocol current state UP IPv6 is enabled link local address is FE80 1234 56FF FE65 4322 Global unicast address es 2001 1 subnet is 2001 64 10 1234 56FF FE65 4322 subnet is 10 64 AUTOCFG valid lifetime 4641s preferred lifetime 4637s Joined group address es FF02 1 FF00 1 FF02 1 FF65 4322 FF02 2 FF02 1 MTU is 1500 bytes ND DAD is enabled number of DAD attempts 1 ND re...

Page 147: ...e link local address Link local address configured for the interface Global unicast address es Global unicast address es configured for the interface valid lifetime Valid lifetime of the global unicast address obtained through stateless autoconfiguration preferred lifetime Preferred lifetime of the global unicast address obtained through stateless autoconfiguration Joined group address es Address ...

Page 148: ... were delivered to application layer protocols such as ICMPv6 TCP and UDP OutRequests Local IPv6 packets sent by IPv6 application protocols OutForwDatagrams Packets forwarded by the outbound interface InNoRoutes IPv6 packets that were discarded because no matched route can be found InTooBigErrors IPv6 packets that were discarded because they exceeded the PMTU OutFragOKs Packets that were fragmente...

Page 149: ...down command down Indicates that the VLAN interface is administratively up but its physical state is down No port in the VLAN is up due to a connection or link failure up Indicates that the administrative and physical states of the VLAN interface are both up Protocol Link layer protocol state of the interface down Indicates that the network layer protocol state of the VLAN interface is down up Ind...

Page 150: ... entries Examples Display the ND snooping entries of VLAN 1 Sysname display ipv6 nd snooping vlan 1 IPv6 Address MAC Address VID Interface Aging Status 4001 1 0015 e944 a947 1 GE1 0 1 25 Bound Total entries on VLAN 1 1 Table 34 Output description Field Description IPv6 Address IPv6 address of an ND snooping entry MAC Address MAC address of an ND snooping entry VID VLAN ID Interface Receiving port ...

Page 151: ...ndamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the d...

Page 152: ...vlan vlan id count begin exclude include regular expression View Any view Default level 1 Monitor level Parameters all Displays the total number of all neighbor entries including neighbor entries acquired dynamically and configured statically dynamic Displays the total number of all neighbor entries acquired dynamically static Displays the total number of neighbor entries configured statically slo...

Page 153: ...fies the destination IPv6 address for which the PMTU information is to be displayed all Displays all PMTU information dynamic Displays all dynamic PMTU information static Displays all static PMTU information Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the...

Page 154: ...on of the task The task ID is in the range 1 to 100 socket id Displays the information of the socket The socket ID is in the range 0 to 3072 slot slot number Displays the socket information of a specified device in an IRF If no IRF is formed the socket information of only the current device is displayed The slot number argument indicates the member ID of the device If the switch does not support I...

Page 155: ...SS_ASYNC Task VTYD 14 socketid 3 Proto 6 LA 23 FA 0 sndbuf 8192 rcvbuf 8192 sb_cc 0 rb_cc 0 socket option SO_ACCEPTCONN SO_REUSEPORT socket state SS_PRIV SS_ASYNC SOCK_DGRAM Task AGNT 51 socketid 2 Proto 17 LA 161 FA 0 sndbuf 9216 rcvbuf 42080 sb_cc 0 rb_cc 0 socket option SO_REUSEPORT socket state SS_PRIV SS_NBIO SS_ASYNC Task TRAP 52 socketid 2 Proto 17 LA 1024 FA 0 sndbuf 9216 rcvbuf 42080 sb_c...

Page 156: ...slot slot number Displays statistics of IPv6 packets and ICMPv6 packets on a specified device in an IRF If no IRF is formed related information of only the current device is displayed The slot number argument indicates the member ID of the device If the switch does not support IRF the slot number argument must be 1 Filters command output by specifying a regular expression For more information abou...

Page 157: ...col Sent packets Total 0 unreached 0 too big 0 hopcount exceeded 0 reassembly timeout 0 parameter problem 0 echo request 0 echo replied 0 neighbor solicit 0 neighbor advert 0 router solicit 0 router advert 0 redirected 0 Send failed ratelimited 0 other errors 0 Received packets Total 0 checksum error 0 too short 0 bad code 0 unreached 0 too big 0 hopcount exceeded 0 reassembly timeout 0 parameter ...

Page 158: ...correct options Number of packets with incorrect protocol Number of received fragment packets Number of reassembled packets Number of packets failing to be reassembled Number of packets whose reassembly times out ICMPv6 protocol Statistics of ICMPv6 packets Sent packets Total 0 unreached 0 too big 0 hopcount exceeded 0 reassembly timeout 0 parameter problem 0 echo request 0 echo replied 0 neighbor...

Page 159: ...f Echo Reply packets Number of neighbor solicitation messages Number of neighbor advertisement packets Number of router solicitation packets Number of router advertisement packets Number of Redirect packets Number of packets recounted by the router Number of unknown type of packets Number of packets with a incorrect size Number of packets failing to be received due to rate limitation display tcp i...

Page 160: ...ets 0 0 bytes packets with data after window 0 0 bytes packets after close 0 ACK packets 0 0 bytes duplicate ACK packets 0 too much ACK packets 0 Sent packets Total 0 urgent packets 0 control packets 0 including 0 RST window probe packets 0 window update packets 0 data packets 0 0 bytes data packets retransmitted 0 0 bytes ACK only packets 0 0 delayed Retransmitted timeout 0 connections dropped in...

Page 161: ...s closed Number of ACK packets Number of duplicate ACK packets Number of excessive ACK packets Sent packets Total 0 urgent packets 0 control packets 0 including 0 RST window probe packets 0 window update packets 0 data packets 0 0 bytes data packets retransmitted 0 0 bytes ACK only packets 0 0 delayed Statistics of sent packets Total number of packets Number of packets containing an urgent indicat...

Page 162: ...line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display tcp ipv6 status command to display the IPv6 TCP c...

Page 163: ...ls Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display u...

Page 164: ...et Total number of packets whose data length exceeds that specified by the packet header unicast no socket on port Total number of received unicast packets without any socket broadcast multicast no socket on port Total number of received broadcast multicast packets without any socket not delivered input socket full Number of packets not handled because of the receive buffer being full input packet...

Page 165: ...lobal unicast address is configured for an interface Except for the link local address automatically obtained and the one generated through stateless autoconfiguration all IPv6 addresses will be removed from the interface if you carry out the undo ipv6 address command without any parameter specified Examples Set the global IPv6 unicast address of VLAN interface 100 to 2001 1 with prefix length 64 ...

Page 166: ...nycast ipv6 address auto Syntax ipv6 address auto undo ipv6 address auto View Interface view Default level 2 System level Parameters None Description Use the ipv6 address auto command to enable the stateless address autoconfiguration function on the interface With this function enabled the interface can automatically generate a global unicast address Use the undo ipv6 address auto command to disab...

Page 167: ...erated through the ipv6 address auto link local command After the undo ipv6 address auto link local command is used on an interface that has an IPv6 global unicast address configured the interface still has a link local address If the interface has no IPv6 global unicast address configured it will have no link local address Manual assignment takes precedence over automatic generation If you first ...

Page 168: ...fied prefix and the automatically generated interface identifier and can be displayed by using the display ipv6 interface command You cannot specify the prefix length of an EUI 64 IPv6 address to be greater than 64 Examples Configure an EUI 64 IPv6 address for VLAN interface 100 The prefix length of the address is the same as that of 2001 1 64 and the interface ID is generated based on the MAC add...

Page 169: ...or automatic generation of an IPv6 link local address see the ipv6 address auto link local command Examples Configure a link local address for VLAN interface 100 Sysname system view Sysname interface vlan interface 100 Sysname Vlan interface100 ipv6 address fe80 1 link local ipv6 hoplimit expires enable Syntax ipv6 hoplimit expires enable undo ipv6 hoplimit expires View System view Default level 2...

Page 170: ...nd to restore the defaults By default the size is 10 and the update period is 100 milliseconds Up to 10 ICMPv6 error packets can be sent within 100 milliseconds Examples Set the capacity of the token bucket to 50 and the update period to 100 milliseconds Sysname system view Sysname ipv6 icmp error bucket 50 ratelimit 100 ipv6 icmpv6 multicast echo reply enable Syntax ipv6 icmpv6 multicast echo rep...

Page 171: ...quire an IPv6 address through stateful autoconfiguration for example from a DHCP server Use the undo ipv6 nd autoconfig managed address flag command to restore the default By default the M flag is set to 0 so that the host can acquire an IPv6 address through stateless autoconfiguration Examples Configure the host to acquire an IPv6 address through stateful autoconfiguration Sysname system view Sys...

Page 172: ...ipv6 nd autoconfig other flag ipv6 nd dad attempts Syntax ipv6 nd dad attempts value undo ipv6 nd dad attempts View Interface view Default level 2 System level Parameters value Specifies the number of attempts to send an NS message for DAD in the range 0 to 600 The default value is 1 When it is set to 0 DAD is disabled Description Use the ipv6 nd dad attempts command to configure the number of att...

Page 173: ...ans timer value undo ipv6 nd ns retrans timer View Interface view Default level 2 System level Parameters value Specifies the interval for retransmitting an NS message in milliseconds in the range 1000 to 4 294 967 295 Description Use the ipv6 nd ns retrans timer command to set the interval for retransmitting an NS message The local interface retransmits an NS message at intervals of this value Fu...

Page 174: ...not only the neighbor reachable time on the local interface but also the value of the Reachable Time field in RA messages sent by the local interface Use the undo ipv6 nd nud reachable time command to restore the default By default the neighbor reachable time on the local interface is 30 000 milliseconds and the value of the Reachable Time field in RA messages is 0 so that the reachable time is de...

Page 175: ... nd ra halt undo ipv6 nd ra halt View Interface view Default level 2 System level Parameters None Description Use the ipv6 nd ra halt command to enable RA message suppression Use the undo ipv6 nd ra halt command to disable RA message suppression By default RA messages are suppressed Examples Suppress RA messages on VLAN interface 100 Sysname system view Sysname interface vlan interface 100 Sysname...

Page 176: ... RA messages is 600 seconds and the minimum interval is 200 seconds NOTE The minimum interval should be three fourths of the maximum interval or less The maximum interval for sending RA messages should be less than or equal to the router lifetime in RA messages Examples Set the maximum interval for advertising RA messages to 1 000 seconds and the minimum interval to 700 seconds Sysname system view...

Page 177: ...to 4 294 967 295 no autoconfig Specifies a prefix not to be used for stateless autoconfiguration If this keyword is not provided the prefix is used for stateless autoconfiguration off link Indicates that the address with the prefix is not directly reachable on the link If this keyword is not provided the address with the prefix is directly reachable on the link Description Use the ipv6 nd ra prefi...

Page 178: ...y default the router lifetime in RA messages is 1 800 seconds The router lifetime in RA messages should be greater than or equal to the advertising interval Examples Set the router lifetime in RA messages on VLAN interface 100 to 1 000 seconds Sysname system view Sysname interface vlan interface 100 Sysname Vlan interface100 ipv6 nd ra router lifetime 1000 ipv6 nd snooping enable Syntax ipv6 nd sn...

Page 179: ...nd snooping max learning num command to restore the default By default the number of ND snooping entries that an interface can learn is not limited Examples Set the maximum number of ND snooping entries that can be learned on Layer 2 Ethernet interface GigabitEthernet 1 0 1 to 1000 Sysname system view Sysname interface GigabitEthernet 1 0 1 Sysname GigabitEthernet1 0 1 ipv6 nd snooping max learnin...

Page 180: ... entry is in the INCMP state After the switch obtains the corresponding Layer 2 port information through resolution the neighbor entry will go into the REACH state If the second method is used the corresponding VLAN interface must exist and the port specified by port type port number must belong to the VLAN specified by vlan id After the static neighbor entry is configured the switch will relate t...

Page 181: ...rface 100 to 10 Sysname system view Sysname interface vlan interface 100 Sysname Vlan interface100 ipv6 neighbors max learning num 10 ipv6 neighbor stale aging Syntax ipv6 neighbor stale aging aging time undo ipv6 neighbor stale aging View System view Default level 2 System level Parameters aging time Age timer for ND entries in the range 1 to 24 hours Description Use ipv6 neighbor stale aging com...

Page 182: ...pecified IPv6 address Sysname system view Sysname ipv6 pathmtu fe80 12 1300 ipv6 pathmtu age Syntax ipv6 pathmtu age age time undo ipv6 pathmtu age View System view Default level 2 System level Parameters age time Specifies the aging time for PMTU in minutes in the range 10 to 100 Description Use the ipv6 pathmtu age command to configure the aging time for a dynamic PMTU Use the undo ipv6 pathmtu ...

Page 183: ...ove existing temporary IPv6 addresses By default the system does not generate or use any temporary IPv6 address You need to configure the valid lifetime greater than or equal to the preferred lifetime You need to enable stateless address autoconfiguration before configuring this function The preferred lifetime of a temporary IPv6 address takes the value of the preferred lifetime of the address pre...

Page 184: ...snooping Syntax reset ipv6 nd snooping ipv6 address vlan vlan id View User view Default level 2 System level Parameters ipv6 address Clears the ND snooping entries of the specified IPv6 address vlan vlan id Clears the ND snooping entries of the specified VLAN The VLAN ID ranges 1 to 4094 Description Use the reset ipv6 nd snooping command to clear ND snooping entries If no parameter is specified th...

Page 185: ...n on all interfaces Description Use the reset ipv6 neighbors command to clear IPv6 neighbor information You can use the display ipv6 neighbors command to display the current IPv6 neighbor information Examples Clear neighbor information on all interfaces Sysname reset ipv6 neighbors all Clear dynamic neighbor information on all interfaces Sysname reset ipv6 neighbors dynamic Clear all neighbor info...

Page 186: ...cs command to clear the statistics of IPv6 packets and ICMPv6 packets You can use the display ipv6 statistics command to display the statistics of IPv6 and ICMPv6 packets Examples Clear the statistics of IPv6 packets and ICMPv6 packets Sysname reset ipv6 statistics reset tcp ipv6 statistics Syntax reset tcp ipv6 statistics View User view Default level 2 System level Parameters None Description Use...

Page 187: ... fin timeout Syntax tcp ipv6 timer fin timeout wait time undo tcp ipv6 timer fin timeout View System view Default level 2 System level Parameters wait time Specifies the length of the finwait timer for IPv6 TCP connections in seconds in the range 76 to 3600 Description Use the tcp ipv6 timer fin timeout command to set the finwait timer for IPv6 TCP connections Use the undo tcp ipv6 timer fin timeo...

Page 188: ...imer of IPv6 TCP connections is 75 seconds Examples Set the synwait timer length of IPv6 TCP connections to 100 seconds Sysname system view Sysname tcp ipv6 timer syn timeout 100 tcp ipv6 window Syntax tcp ipv6 window size undo tcp ipv6 window View System view Default level 2 System level Parameters size Specifies the size of the IPv6 TCP send receive buffer in the range 1 to 32 KB Description Use...

Page 189: ...181 Sysname tcp ipv6 window 4 ...

Page 190: ... that follow exclude Displays all lines that do not match the specified regular expression include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display ipv6 dhcp duid command to display the DUID of the local device Examples Display the DUID of the device Sysname di...

Page 191: ...a case sensitive string of 1 to 256 characters Description Use the display ipv6 dhcp pool command to display DHCPv6 address pool information Examples Display all address pool information Sysname display ipv6 dhcp pool Pool Prefix pool 1 1 2 Not configured Table 42 Output description Field Description Pool DHCPv6 address pool number Prefix pool Prefix pool referenced by the address pool If no refer...

Page 192: ...his field is not displayed SIP server domain name Domain name of the SIP server If no domain name of the SIP server is configured this field is not displayed display ipv6 dhcp prefix pool Syntax display ipv6 dhcp prefix pool prefix pool number begin exclude include regular expression View Any view Default level 1 Monitor level Parameters prefix pool number Displays details about the prefix pool sp...

Page 193: ...Number of idle prefixes In use Number of assigned prefixes Static Number of static prefixes Assigned length Length of prefixes to be assigned Total prefix number Total number of prefixes display ipv6 dhcp server Syntax display ipv6 dhcp server interface interface type interface number begin exclude include regular expression View Any view Default level 1 Monitor level Parameters interface interfac...

Page 194: ...e Sysname display ipv6 dhcp server interface vlan interface 2 Using pool 1 Preference value 0 Allow hint Enabled Rapid commit Disabled Table 45 Output description Field Description DHCPv6 server status DHCPv6 server status which can be Enabled or Disabled Interface Interface on which the DHCPv6 server is enabled Pool Address pool applied to the interface Using pool Address pool applied to the inte...

Page 195: ...match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display ipv6 dhcp server pd in use command to display PD information The PD information generated for static prefixes is not displayed when you display the PD information of a specific prefix pool Examples Display all PD information Sysname dis...

Page 196: ...e assigned officially after the server receives a Request message or the server supporting rapid assignment receives the Solicit message containing a Rapid Commit option Pool Address pool to which the PD belongs Lease expiration Lease expiration time If the lease will expire after the year 2100 this field displays after 2100 For the ineffective static PD this field displays Not available Prefix Po...

Page 197: ...include Displays all lines that match the specified regular expression regular expression Specifies a regular expression a case sensitive string of 1 to 256 characters Description Use the display ipv6 dhcp server statistics command to display packet statistics on the DHCPv6 server Examples Display packet statistics on the DHCPv6 server Sysname display ipv6 dhcp server statistics Packets received 0...

Page 198: ...do dns server ipv6 address View DHCPv6 address pool view Default level 2 System level Parameters ipv6 address Specifies the IPv6 address of a DNS server Description Use the dns server command to specify a DNS server for the client Use the undo dns server command to remove the specified DNS server No DNS server address is specified by default You can configure multiple DNS server addresses by using...

Page 199: ...se the undo domain name command to remove the configuration By default no domain name is configured for the client You can configure only one domain name in an address pool If you repeatedly use the domain name command the latest configuration will overwrite the previous one Examples Configure the domain name to be assigned to the client as aaa com Sysname system view Sysname ipv6 dhcp pool 1 Sysn...

Page 200: ...he specified prefix pool The prefix indicates the IPv6 prefix The prefix len indicates the prefix length in the range 1 to 128 assign len assign len Specifies the length of the prefix assigned The value ranges from 1 to 128 The assign len must be higher than or equal to the prefix len and the difference between them must be less than or equal to 16 Description Use the ipv6 dhcp prefix pool command...

Page 201: ... interface the DHCPv6 server selects a prefix from the address pool applied to the interface and assigns it to the client With the allow hint keyword specified the server assigns the desired prefix to the requesting client If the desired prefix is not included in the assignable prefix pool of the interface or is already assigned to another client the server ignores the desired prefix and assigns t...

Page 202: ... disabled Other DHCPv6 server related configuration is effective only when the DHCPv6 server is enabled Examples Enable the DHCPv6 server Sysname system view Sysname ipv6 dhcp server enable prefix pool Syntax prefix pool prefix pool number preferred lifetime preferred lifetime valid lifetime valid lifetime undo prefix pool View DHCPv6 address pool view Default level 2 System level Parameters prefi...

Page 203: ...uration before you can have another prefix pool referenced by the address pool or modify the preferred lifetime and valid lifetime NOTE Only one prefix pool can be referenced by an address pool Examples Apply prefix pool 1 to address pool 1 and use the default preferred lifetime and valid lifetime Sysname system view Sysname ipv6 dhcp pool 1 Sysname dhcp6 pool 1 prefix pool 1 Apply prefix pool 1 t...

Page 204: ...ipv6 dhcp server statistics Syntax reset ipv6 dhcp server statistics View User view Default level 1 Monitor level Parameters None Description Use the reset ipv6 dhcp server statistics command to remove packet statistics on the DHCPv6 server Examples Clear packet statistics on the DHCPv6 server Sysname reset ipv6 dhcp server statistics sip server Syntax sip server address ipv6 address domain name d...

Page 205: ...rred lifetime preferred lifetime valid lifetime valid lifetime undo static bind prefix prefix prefix len View DHCPv6 address pool view Default level 2 System level Parameters prefix prefix len Specifies the static prefix and prefix length duid duid Client DUID The value is an even hexadecimal number in the range 2 to 256 iaid iaid Client IAID The value is a hexadecimal number in the range 0 to FFF...

Page 206: ...nitor level Parameters all Displays all DHCPv6 server address information interface interface type interface number Displays DHCPv6 server address information of the specified interface Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular exp...

Page 207: ...expression View Any view Default level 1 Monitor level Parameters Filters command output by specifying a regular expression For more information about regular expressions see the Fundamentals Configuration Guide begin Displays the first line that matches the specified regular expression and all lines that follow exclude Displays all lines that do not match the specified regular expression include ...

Page 208: ...er of received packets SOLICIT Number of received solicit packets REQUEST Number of received request packets CONFIRM Number of received confirm packets RENEW Number of received renew packets REBIND Number of received rebind packets RELEASE Number of received release packets DECLINE Number of received decline packets INFORMATION REQUEST Number of received information request packets RELAY FORWARD N...

Page 209: ...orwards the message to the specified DHCPv6 server which then assigns an IPv6 address and other configuration parameters to the DHCPv6 client Executing the ipv6 dhcp relay server address command repeatedly can specify multiple DHCPv6 servers and up to eight DHCP servers can be specified for an interface After receiving requests from DHCPv6 clients the DHCPv6 relay agent forwards the requests to al...

Page 210: ...pv6 dhcp client Syntax display ipv6 dhcp client interface interface type interface number begin exclude include regular expression View Any view Default level 1 Monitor level Parameters interface interface type interface number Displays the DHCPv6 client information of a specified interface Filters command output by specifying a regular expression For more information about regular expressions see...

Page 211: ...e DHCPv6 client enters the INIT state IDLE After receiving an RA message with the M flag set to 0 and O flag set to 1 and enabled with stateless DHCPv6 the DHCPv6 client enters the IDLE state INFO REQUESTING The DHCPv6 client is requesting configuration information OPEN The DHCPv6 client successfully obtained configuration parameters and completed stateless configuration based on the obtained para...

Page 212: ...he display ipv6 dhcp client statistics command to display DHCPv6 client statistics With no parameters specified DHCPv6 client statistics of all the interfaces is displayed Related commands reset ipv6 dhcp client statistics Examples Display DHCPv6 client statistics of VLAN interface 2 Sysname display ipv6 dhcp client statistics interface vlan interface 2 Interface Vlan interface2 Packets Received 1...

Page 213: ...r level Parameters interface interface type interface number Clears DHCPv6 client statistics of a specified interface Description Use the reset ipv6 dhcp client statistics command to clear DHCPv6 client statistics With no parameters specified DHCPv6 client statistics of all the interfaces is cleared After this command is executed the packets statistics is displayed as 0 when you use the display ip...

Page 214: ...splay ipv6 dhcp snooping trust Trusted ports include GigabitEthernet1 0 1 GigabitEthernet1 0 2 display ipv6 dhcp snooping user binding Syntax display ipv6 dhcp snooping user binding ipv6 address dynamic begin exclude include regular expression View Any view Default level 1 Monitor level Parameters ipv6 address Displays DHCPv6 snooping entries of the specified IPv6 address dynamic Displays all DHCP...

Page 215: ...AN to which the interface belongs Interface Interface through which the DHCPv6 client is connected ipv6 dhcp snooping enable Syntax ipv6 dhcp snooping enable undo ipv6 dhcp snooping enable View System view Default level 2 System level Parameters None Description Use the ipv6 dhcp snooping enable command to enable DHCPv6 snooping globally Use the undo ipv6 dhcp snooping enable command to disable DH...

Page 216: ...e number of DHCPv6 snooping entries learned by an interface is not limited Examples Set the maximum number of DHCPv6 snooping entries Layer 2 Ethernet interface GigabitEthernet 1 0 1 can learn to 1000 Sysname system view Sysname interface GigabitEthernet 1 0 1 Sysname GigabitEthernet1 0 1 ipv6 dhcp snooping max learning num 1000 ipv6 dhcp snooping trust Syntax ipv6 dhcp snooping trust undo ipv6 dh...

Page 217: ...able command to enable DHCPv6 snooping for a specific VLAN Use the undo ipv6 dhcp snooping vlan enable command to disable DHCPv6 snooping for a specific VLAN By default DHCPv6 snooping is disabled for a VLAN After DHCPv6 snooping is enabled globally and then enabled for a VLAN the DHCPv6 snooping device records DHCPv6 snooping entries according to the DHCPv6 packets received in the VLAN Meanwhile ...

Page 218: ...ng entries of the specified IPv6 address dynamic Clears all DHCPv6 snooping entries Description Use the reset ipv6 dhcp snooping user binding command to clear DHCPv6 snooping entries Examples Clear all DHCPv6 snooping entries Sysname reset ipv6 dhcp snooping user binding dynamic ...

Page 219: ... wwalerts After registering you will receive email notification of product enhancements new driver versions firmware updates and other product resources Related information Documents To find related documents browse to the Manuals page of the HP Business Support Center website http www hp com support manuals For related documentation navigate to the Networking section and select a networking categ...

Page 220: ...eparated by vertical bars from which you select one choice multiple choices or none 1 n The argument or keyword and argument combination before the ampersand sign can be entered 1 to n times A line that starts with a pound sign is comments GUI conventions Convention Description Boldface Window names button names field names and menu items are in bold text For example the New User window appears cl...

Page 221: ...ting capable device such as a router or Layer 3 switch Represents a generic switch such as a Layer 2 or Layer 3 switch or a router that supports Layer 2 forwarding and other Layer 2 features Port numbering in examples The port numbers in this document are for illustration only and might be unavailable on your device ...

Page 222: ...erver threshold 26 dhcp snooping 76 dhcp snooping binding database filename 76 dhcp snooping binding database update interval 77 dhcp snooping binding database update now 78 dhcp snooping check mac address 78 dhcp snooping check request message 79 dhcp snooping information circuit id format type 80 dhcp snooping information circuit id string 80 dhcp snooping information enable 81 dhcp snooping inf...

Page 223: ...142 display ipv6 neighbors count 144 display ipv6 pathmtu 145 display ipv6 socket 146 display ipv6 statistics 148 display local proxy arp 10 display proxy arp 10 display tcp ipv6 statistics 151 display tcp ipv6 status 154 display tcp statistics 1 17 display udp ipv6 statistics 155 display udp statistics 1 19 display udp helper server 132 dns domain 99 dns proxy enable 99 dns resolve 100 dns server...

Page 224: ...v6 unreachables enable 175 L local proxy arp enable 1 1 M mac address station move 6 N nbns list 39 netbios type 40 network 41 network ip range 41 network mask 42 O option 43 P prefix pool 194 proxy arp enable 12 R reset arp 7 reset dhcp relay statistics 71 reset dhcp server conflict 44 reset dhcp server ip in use 44 reset dhcp server statistics 45 reset dhcp snooping 91 reset dhcp snooping packet...

Page 225: ...217 tcp window 126 tftp server domain name 47 tftp server ip address 48 U udp helper enable 133 udp helper port 133 udp helper server 134 V vendor class identifier 49 voice config 50 ...

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