D-Link DGS-1510-28X User Manual - Page 163
Usage Guideline
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DGS-1510 Series Gigabit Ethernet SmartPro Switch CLI Reference Guide This example shows how to disable the global DHCP relay agent check but enables the DHCP relay agent check for the VLAN 100. The effect state of the check function for VLAN100 is enabled. Switch# configure terminal Switch(config)# no ip dhcp relay information check switch(config)# interface vlan 100 switch(config-if)# ip dhcp relay information check-reply 17-6 ip dhcp relay information option This command is used to enable the insertion of relay agent information (Option 82) during the relay of DHCP request packets. Use the no command to disable this insert function. ip dhcp relay information option no ip dhcp relay information option Parameters None. Default By default, Option 82 is not inserted. Command Mode Global Configuration Mode. Command Default Level Level: 12. Usage Guideline 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 userdefined string for the remote ID sub-option. 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)# 17-7 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 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] 160
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