Motorola BSR 2000 manual Specifies that only CPE UDP broadcasts are

BSR 2000 Command Reference GuideRelease 1.0

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.
mta	specifies that only CPE MTA broadcasts are
	forwarded.
isp-bind A.B.C.D	specifies the secondary IP subnet to which the
	cable-helper is bound.

11-34 MGBI 526363-001-00 Rev. B