Cisco Systems MC-607 manual MC-646

Configuring Subscriber-End Broadband Access Router Features

Configuring Bridging

	Command	Purpose
Step 7
	uBR924(config-if)# bridge-groupbridge-group	Assigns the Ethernet0 interface to a bridge group.
		The bridge group must be an integer from 1 to 63.
Step 8
	uBR924(config-if)# bridge-groupbridge-group	Disables spanning tree on the Ethernet interface.
	spanning-disabled
Step 9
	uBR924(config-if)# end	Exits interface configuration mode for the Ethernet0
	uBR924(config)# interface cable-modem0	interface and enters interface configuration mode for
		the cable access router interface.
Step 10
	uBR924(config-if)# no ip address	Disables the IP address of the coaxial cable interface,
		if one has been set. The Cisco uBR7200 series cable
		router assigns an IP address to the cable access router
		each time it connects to the network.
Step 11
	uBR924(config-if)# no ip route-cache	Disables high-speed switching caches for IP routing
		on the cable interface.
Step 12
	uBR924(config-if)# no keepalive	Disables keepalives on the cable interface.
Step 13
	uBR924(config-if)#cable-modem compliant bridge	Enables DOCSIS-compliant bridging.
Step 14
	uBR924(config-if)# bridge-groupbridge-group	Assigns the cable access router interface to a bridge
		group. The bridge group must be an integer from 1 to
		63. (The default is 59.)
Step 15
	uBR924(config-if)# bridge-groupbridge-group	Disables spanning tree on the cable interface.
	spanning-disabled
Step 16
	uBR924(config-if)# end	Exits interface configuration mode.
	uBR924(config)# ip classless	(Optional) At times, the Cisco uBR900 series might
		receive packets destined for a subnet of a network that
		has no network default route. This global
		configuration mode command allows the Cisco IOS
		software to forward such packets to the best network
		route possible.
Step 17
	uBR924(config)# line console 0	Enters line configuration mode to configure the
		console port.
Step 18
	uBR924(config-line)# line vty 0 4	Identifies the last line in a contiguous group of virtual
		terminals you want to configure.
Step 19
	uBR924(config-line)# Ctrl-z	Returns to privileged EXEC mode.
	uBR924# copy running-config startup-config Building	Saves the configuration to NVRAM so that it will not
	configuration...	be lost in the event of a reset, power cycle, or power
		outage.

When the cable interface comes up, the IP address and downstream channel are configured automatically.

Note To configure multiple PCs, repeat Steps 4 through 7 above for each additional PC. You can connect a maximum of three PCs to the Cisco uBR900 series cable access router in a bridging application.

Cisco IOS Multiservice Applications Configuration Guide

MC-646