Motorola BSR 2000 manual Ip dhcp relay information

Release 1.0 IP Commands

ip dhcp relay information

The ip dhcp relay information command enables the BSR to insert DHCP relay information option (option-82) into received DHCP client messages being forwarded to a DHCP server (configured using the cable helper command). Support for DHCP Option-82, sub-option 2 (Agent Remote ID), which is enabled by the ip dhcp relay information option command, allows the relay agent in the BSR to insert the MAC address of the modem that the DHCP client is behind into outbound DHCP client requests (i.e., DHCP Discovers and DHCP Requests as they traverse the BSR). This enables the receiving DHCP server to identify the user sending the request and to treat that client appropriately.

Support for DHCP Option-82, sub-option 1 (Agent Circuit ID), which is enabled by the ip dhcp relay information spectrum-group-namecommand, allows the relay agent in the BSR to insert, when available, the Spectrum Group name associated with the upstream channel that the DHCP client is using into outbound DHCP client requests (i.e., DHCP Discovers and DHCP Requests as they traverse the BSR).

Note: f you are configuring two MAC domains on the 2x8 CMTS module, the ip dhcp relay information option command must be entered for each MAC domain. If this command is not entered in for each domain, CMs cannot register in that domain.

Note: If a DHCP client on a particular subnet is using an upstream frequency that is not configured as a member of a Spectrum Group, the Spectrum Group name is not inserted by the DHCP relay agent into the DHCP discover packet.

Group Access

ISP

Command Mode

Interface Configuration (cable interface only)

Command Line Usage

ip dhcp relay information {option spectrum-group-name}no ip dhcp relay information {option spectrum-group-name}

526363-001-00 Rev. B MGBI 2-19