Dell S4048T-ON, Configuration Manual

Page: 309 / 1146

Packets received on snooping disabled L3 Ports : 0
Snooping packets processed on L2 vlans : 142
DHCP Binding File Details
Invalid File : 0
Invalid Binding Entry : 0
Binding Entry lease expired : 0
List of Trust Ports :Te 1/4
List of DHCP Snooping Enabled Vlans :Vl 10
List of DAI Trust ports :Te 1/4
Displaying the Contents of the DHCPv6 Binding Table
To display the contents of the DHCP IPv6 binding table, use the following command.
• Display the contents of the binding table.
EXEC Privilege mode
show ipv6 dhcp snooping biniding
Example of the
show ipv6 dhcp snooping binding
Command
View the DHCP snooping statistics with the
show ipv6 dhcp snooping
command.
Dell#show ipv6 dhcp snooping binding
Codes : S - Static D – Dynamic
IPv6 Address MAC Address Expires(Sec) Type VLAN Interface
=========================================================================
11:11::22 11:22:11:22:11:22 120331 S Vl 100 Te 1/1
33::22 11:22:11:22:11:23 120331 S Vl 200 Te 1/1
333:22::22 11:22:11:22:11:24 120331 D Vl 300 Te 1/2
Debugging the IPv6 DHCP
To debug the IPv6 DHCP, use the following command.
• Display debug information for IPV6 DHCP.
EXEC Privilege mode
debug ipv6 dhcp
IPv6 DHCP Snooping MAC-Address Verification
Configure to enable verify source mac-address in the DHCP packet against the mac address stored in the snooping binding table.
• Enable IPV6 DHCP snooping .
CONFIGURATION mode
ipv6 dhcp snooping verify mac-address
Drop DHCP Packets on Snooped VLANs Only
Binding table entries are deleted when a lease expires or the relay agent encounters a DHCPRELEASE.
Line cards maintain a list of snooped VLANs. When the binding table fills, DHCP packets are dropped only on snooped VLANs, while such
packets are forwarded across non-snooped VLANs. Because DHCP packets are dropped, no new IP address assignments are made.
Dynamic Host Configuration Protocol (DHCP) 309