D-Link DGS-3630-28SC Manual - Page 389
ip dhcp relay information option-insert
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DGS-3630 Layer 3 Stackable Managed Switch CLI Reference Guide Usage Guideline This command takes effect when the service dhcp command is enabled. When DHCP Option 82 is enabled, the DHCP packet received from the client will be inserted with an Option 82 field before being relayed to the server. The DHCP Option 82 contains two sub-options respectively the circuit ID sub-option and remote ID sub-option. Administrators can use the ip dhcp relay information option remote-id command to specify a user-defined string for the remote ID sub-option. The vpn parameter should be used only when the DHCP server allocates the address based on VPN identification sub-options. The ip dhcp relay information option vpn command together with the ip dhcp relay information option vpnid command are used to determine the VPN insertion state effective for an interface. If the ip dhcp relay information option vpnid command is not configured for an interface, the global setting takes effect. If the ip dhcp relay information option vpnid command is configured for an interface, the interface setting takes effect. Example This example shows how to enable the insertion of Option 82 during the relay of DHCP request packets. Switch# configure terminal Switch(config)# ip dhcp relay information option Switch(config)# 23-5 ip dhcp relay information option-insert This command is used to enable or disable the insertion of Option 82 for an interface during the relay of DHCP request packets. Use the no form of this command to remove the configuration of the insert function for the interface. ip dhcp relay information option-insert [none] no ip dhcp relay information option-insert [none] Parameters none (Optional) Specifies to disable insertion of Option 82 in the relayed packet. Default None. Command Mode Interface Configuration Mode. Command Default Level Level: 12. Usage Guideline This command takes effect when the service dhcp command is enabled. Example This example shows how to enable the insertion of Option 82 during the relay of DHCP request packets and disables the insertion of Option 82 for interface VLAN 100. The insertion of Option 82 is disabled for VLAN 100 but enabled for the remaining interfaces. 384
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