Motorola BSR 2000 manual 11-33

Release 1.0 CMTS Commands

cable helper-address

The cable helper address function disassembles a DHCP broadcast packet, and reassembles it into a unicast packet so that the packet can traverse the router and communicate with the DHCP server. The cable helper-addresscommand enables broadcast forwarding for User Datagram Protocol (UDP) packets.

The cable helper-addresscommand can also be used to define the cable helper address to be used for all CPEs whose CMs have an IP address in a particular subnet’s address space. This forces the BSR relay agent to forward DHCP requests from a CPE using a selected ISP to a DHCP server configured for that selected ISP.

Note: The isp-bindoption is only available after selecting the host or mta options. It is not available for the cable modem option.

Note: The cable helper-addresscommand allows operators to support multiple CM subnets bound to a single cable helper-address. Any DHCP requests from clients that are attached to CMs that are part of the Multiple ISP configuration will have their requests relayed to any defined ip helper-addresses.

Group Access

ISP

Command Mode

Interface Configuration (cable and loopback interfaces only)

Command Line Usage

cable helper-address <A.B.C.D> {cable-modem host [isp-bind <A.B.C.D>] mta [isp-bind <A.B.C.D>]}

no cable helper-address <A.B.C.D> {cable-modem host [isp-bind <A.B.C.D>] mta [isp-bind <A.B.C.D>]}

526363-001-00 Rev. B MGBI 11-33