Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 319

FTOS Behavior: In 8.2.1 releases, ip dhcp snooping trust was required on the port-channel interface as well as on channel members. In subsequent releases, it is no longer necessary nor permitted to configure port-channel members as trusted; configuring the port-channel interface alone as trusted is q sufficient, and ports must have the default configuration to be a channel members. When upgrading from 8.2.1 releases, the channel-member configurations are applied first, so when the port-channel is configured, its membership configuration is rejected, since the member ports no longer have the default configuration. In this case, you must manually remove ip dhcp snooping trust on the channel members add the ports to the port-channel. Note: DHCP server packets will be dropped on all untrusted interfaces of a system configured for DHCP snooping. To prevent these packets from being dropped, configure ip dhcp snooping trust on the server-connected port. Enable DCHP snooping Step 1 2 3 Task Enable DHCP Snooping globally. Specify ports connected to DHCP servers as trusted. Enable DHCP Snooping on a VLAN. Command Syntax ip dhcp snooping ip dhcp snooping trust ip dhcp snooping vlan Command Mode CONFIGURATION INTERFACE CONFIGURATION Add a static entry in the binding table Task Command Syntax Add a static entry in the binding table. ip dhcp snooping binding mac Command Mode EXEC Privilege Clear the binding table Task Delete all of the entries in the binding table Command Syntax clear ip dhcp snooping binding Command Mode EXEC Privilege Display the contents of the binding table Task Display the contents of the binding table. Command Syntax show ip dhcp snooping Command Mode EXEC Privilege View the DHCP Snooping statistics with the show ip dhcp snooping command. FTOS#show ip dhcp snooping IP DHCP Snooping IP DHCP Snooping Mac Verification IP DHCP Relay Information-option : Enabled. : Disabled. : Disabled. Dynamic Host Configuration Protocol | 319