D-Link DXS-3400 Emulator - Page 248
ip dhcp relay information policy
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DXS-3400 Series Lite Layer 3 Stackable 10GbE Managed Switch CLI Reference Guide 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. Switch# configure terminal Switch(config)# ip dhcp relay information option Switch(config)# interface vlan 100 Switch(config-if)# ip dhcp relay information option-insert none Switch(config-if)# 21-6 ip dhcp relay information policy This command is used to configure the Option 82 re-forwarding policy for the DHCP relay agent. Use the no form of this command to revert to the default setting. ip dhcp relay information policy {drop | keep | replace} no ip dhcp relay information policy Parameters drop keep replace Specifies to discard the packet that already has the relay option. Specifies that the DHCP requests packet that already has the relay option is left unchanged and directly relayed to the DHCP server. Specifies that the DHCP request packet that already has the relay option will be replaced by a new option. Default By default, this option is replace. Command Mode Global Configuration Mode. Command Default Level Level: 12. Usage Guideline The command only takes effect when the DHCP service is enabled. Use this command to configure the global policy for the insertion of Option 82 on packets that already have Option 82. Example This example shows how to configure the relay agent option re-forwarding policy to keep. If the ip dhcp relay information relay command is configured in the global configuration mode but not configured in the interface configuration mode, the global configuration is applied to all interfaces. Switch# configure terminal Switch(config)# ip dhcp relay information policy keep Switch(config)# 244
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