Motorola BSR 2000 manual Cable helper-address, Cable-modem, Host

Release 1.0 IP 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 is also used to bind a cable helper address to a secondary IP subnet of a CM which is connected to CPEs belonging to a particular ISP. This allows CPEs to have their IP address assigned from the DHCP server belonging to the corresponding ISP.

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

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 mta} [isp-bind <A.B.C.D>]

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

Command Syntax

A.B.C.D	the IP address of the destination DHCP
	server.
cable-modem	specifies that only CM UDP broadcasts are
	forwarded.
host	specifies that only CPE UDP broadcasts are
	forwarded.

526363-001-00 Rev. B MGBI 2-5