2-6If you have configured a circuit ID with the vlan vlan-id argument specified, and the other one withoutthe argument in Ethernet port view, the former circuit ID applies to the DHCP messages from thespecified VLAN, while the latter one applies to DHCP messages from other VLANs.Examples# Set the circuit ID field in Option 82 of the DHCP messages sent through Ethernet 1/0/1 to abc. system-viewSystem View: return to User View with Ctrl+Z.[Sysname] interface Ethernet1/0/1[Sysname-Ethernet1/0/1] dhcp-snooping information circuit-id string abcdhcp-snooping information vlan remote-idSyntaxdhcp-snooping information [ vlan vlan-id ] remote-id string stringundo dhcp-snooping information { [ vlan vlan-id ] remote-id | remote-id all }ViewEthernet port viewParametersvlan vlan-id: Specifies the VLAN ID of the remote ID to be customized.string: Customized content of the remote ID sub-option, a string of 3 to 63 ASCII characters.DescriptionUse the dhcp-snooping information vlan remote-id command to configure the content of the remoteID in Option 82Use the undo dhcp-snooping information remote-id command to restore the default remote ID inOption 82.With vlan vlan-id specified, the customized remote ID sub-option applies only to the DHCP packetsfrom the specified VLAN. Without vlan vlan-id specified, the customized remote ID sub-option appliesto all DHCP packets that pass through the current port.Use the undo dhcp-snooping information vlan vlan-id remote-id command to restore the defaultremote ID in DHCP packets from the specified VLAN.Use the undo dhcp-snooping information remote-id command to restore the default remote ID in allDHCP packets except those from the specified VLAN.Use the undo dhcp-snooping information remote-id all command to restore the default remote ID inall DHCP packets.By default, the remote ID sub-option in Option 82 is the MAC address of the DHCP Snooping devicethat received the DHCP client’s request.If you have configured a remote ID with the vlan vlan-id argument specified, and the other one withoutthe argument in Ethernet port view, the former remote ID applies to the DHCP messages from thespecified VLAN, while the latter one applies to DHCP messages from other VLANs.
