Dell PowerSwitch S4112F-ON EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 227
ipv6 helper-address, ip dhcp-relay information-option, Table 10. Option 82 status
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Usage Information Example (IPv4) The DHCP server is supported only on L3 interfaces. After you configure an IP helper address, the address forwards UDP broadcasts to the DHCP server. You can configure multiple helper addresses on an interface by repeating the same command for each DHCP server address. The no version of this command returns the value to the default. The client-facing and server-facing interfaces must be in the same VRF. OS10(config)# interface eth 1/1/22 OS10(conf-if-eth1/1/22)# ip helper-address 20.1.1.1 vrf blue Supported Releases 10.2.0E or later ipv6 helper-address Configures a DHCPv6 server address. Syntax Parameters ipv6 helper-address ipv6-address [vrf vrf-name] ● vrf vrf-name - (Optional) Enter the keyword vrf and then the name of the VRF through which the host address can be reached. ● ipv6-address - Specify the DHCPv6 server address in the A::B format. Defaults Command Mode Usage Information Example Disabled INTERFACE Use this command on interfaces to which DHCPv6 clients connect, to forward the packets between IPv6 clients and a DHCPv6 server. After you configure an IPv6 helper address, the address forwards UDP broadcasts from IPv6 clients to the DHCPv6 server. You can configure multiple helper addresses on an interface by repeating the same command for each DHCPv6 server address. The no version of this command deletes the IPv6 helper address. OS10(config)# interface ethernet 1/1/22 OS10(conf-if-eth1/1/22)# ipv6 helper-address 2001:db8:0:1:1:1:1:1 vrf blue Supported Releases 10.4.1.0 or later ip dhcp-relay information-option Configures the system to enable the remote-id string in Option 82. Syntax Parameters Default Command Mode Usage Information ip dhcp-relay information-option None. Not configured CONFIGURATION, INTERFACE CONFIGURATION By default, option 82 is enabled globally. When option 82 is enabled globally, the relay agent adds the client information to the packet and sends it to the server. When option 82 is disabled globally, the client packets are sent to the server without option 82 information. When both global as well as interface level option 82 configurations are present , the configuration to disable option 82 takes precedence. The following table shows the option 82 status depending on the global and interface level configurations: Table 10. Option 82 status Global Level Enable Interface Level Enable Option 82 status Adds option 82 information to the packet. System management 227
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