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Configuration Guide 581
Configuring Network Security
DHCP Snooping Configuration
Switch(config)#ip dhcp snooping vlan
5
Switch(config)#show ip dhcp snooping
Global Status: Enable
VLAN ID: 5
Switch(config-if)#end
Switch#copy running-config startup-config
3.2.2 Configuring DHCP Snooping on Ports
Follow these steps to configure DHCP Snooping on the specified ports.
Step 1
configure
Enter global configuration mode.
Step 2
interface {
fastEthernet
port
|
range fastEthernet
port-list
|
gigabitEthernet
port
|
range
gigabitEthernet
port-list
|
interface port-channel
port-channel-id
|
interface range
port-
channel
port-channel-id-list
}
Enter interface configuration mode.
Step 3
ip dhcp snooping trust
Set the port that is connected to the DHCP server as a trusted port. The switch can forward
the DHCP packets on the trusted port and discard the DHCP response packets on the
distrusted port, so as to ensure that users get proper IP addresses from the legal DHCP
server.
Step 4
ip dhcp snooping mac-verify
Enable the MAC Verify feature. There are two fields in the DHCP packet that contain the
MAC address of the host. The MAC Verify feature compares the two fields of a DHCP
packet and discards the packet if the two fields are different. This prevents the IP address
resource on the DHCP server from being exhausted by forged MAC addresses.
Step 5
ip dhcp snooping limit rate
value
Enable the limit rate feature and specify the maximum number of DHCP messages that can
be forwarded on the port per second. The excessive DHCP packets will be discarded.
value:
Specify the limit rate value. The following options are provided: 0, 5,10,15,20,25 and
30 (packets/second). The default value is 0, which indicates disabling limit rate.
Step 6
ip dhcp snooping decline rate
value
Enable the decline protect feature and specify the maximum number of Decline packets
can be forwarded per second on the port. The excessive DHCP Decline packets will be
discarded.
value:
Specify the limit rate value of Decline packets. The following options are provided: 0,
5,10,15,20,25 and 30 (packets/second). The default value is 0, which indicates disabling this
feature.
Содержание T2500G-10MPS
Страница 1: ...User Guide T2500G 10MPS 1910012405 REV1 0 1 April 2018...
Страница 24: ...Using the CLI 767 Appendix Default Parameters 773...
Страница 27: ...Part 1 Accessing the Switch CHAPTERS 1 Overview 2 Web Interface Access 3 Command Line Interface Access...
Страница 129: ...Part 4 Configuring LAG CHAPTERS 1 LAG 2 LAG Configuration 3 Configuration Example 4 Appendix Default Parameters...
Страница 145: ...Part 5 Monitoring Traffic CHAPTERS 1 Traffic Monitor 2 Appendix Default Parameters...
Страница 172: ...Part 7 Configuring DDM CHAPTERS 1 Overview 2 DDM Configuration 3 Appendix Default Parameters...
Страница 190: ...Part 8 Configuring L2PT CHAPTERS 1 Overview 2 L2PT Configuration 3 Configuration Example 4 Appendix Default Parameters...
Страница 274: ...Part 13 Configuring GVRP CHAPTERS 1 Overview 2 GVRP Configuration 3 Configuration Example 4 Appendix Default Parameters...
Страница 800: ...Configuration Guide 776 Configuring SNMP RMON Appendix Default Parameters Parameter Default Setting Status Disable...
Страница 803: ...BSMI Notice Pb Cd Hg CrVI PBB PBDE PCB 1 2...