Cisco Systems UBR900 Configuring Bridging, UBR924config#no service password-encryption

Configuring Bridging

Configuring Bridging

The Cisco uBR900 series cable access router is configured for DOCSIS-compliant transparent bridging by default. If it becomes necessary to reconfigure the unit for bridging after it has been configured for routing, you can erase the routing configuration and return the unit to factory default configuration settings, or you can reconfigure the unit manually using the CLI. To return the cable access router to factory default settings, see the section “Reestablishing DOCSIS-Compliant Bridging” on page 43 for details. To reconfigure the cable access router manually, perform the following tasks, starting in global configuration mode:

Step	Command	Purpose
1	uBR924(config)#no service pad	Disable packet assembler/disassembler commands;
		prevent the uBR900 series from accepting incoming or
		outgoing Packet Assembler/Disassembler (PAD)
		connections.
2	uBR924(config)#no service password-encryption	Disable password encryption.
3	uBR924(config)#no ip routing	Disable IP routing on the uBR900 series.
4	uBR924(config)#interface Ethernet0	Enter interface configuration mode for the Ethernet0
		interface.
5	uBR924(config-if)#no ip address	Disable the IP address on the Ethernet0 interface.
6	uBR924(config-if)#no ip route-cache	Disable high-speed switching caches for IP routing.
7	uBR924(config-if)#bridge-groupbridge-group	Assign the Ethernet0 interface to a bridge group. The
		bridge group must be an integer between 1 and 63.
8	uBR924(config-if)#bridge-groupbridge-group	Disable spanning tree on the Ethernet interface.
	spanning-disabled
9	uBR924(config-if)#end	Exit interface configuration mode for the Ethernet0
	uBR924(config)#interface cable-modem0	interface and enter interface configuration mode for the
		cable access router interface.
10	uBR924(config-if)#no ip address	Disable the IP address of the coaxial cable interface, if
		one has been set. The uBR7246 cable router assigns an IP
		address to the cable access router each time it connects to
		the network.
11	uBR924(config-if)#no ip route-cache	Disable high-speed switching caches for IP routing on the
		cable interface.
12	uBR924(config-if)#no keepalive	Disable keepalives on the cable interface.
13	uBR924(config-if)#cable-modem compliant bridge	Enable DOCSIS-compliant bridging.
14	uBR924(config-if)#bridge-groupbridge-group	Assign the cable access router interface to a bridge group.
		The bridge group must be an integer from 1 to 63. (The
		default is 59.)
15	uBR924(config-if)#bridge-groupbridge-group	Disable spanning tree on the cable interface.
	spanning-disabled
16	uBR924(config-if)#end	Exit interface configuration mode.
	uBR924(config)#ip classless	(Optional) At times, the 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.
17	uBR924(config)#line console 0	Enter line configuration mode to configure the console
		port.

Configuring the Cisco uBR900 Series Cable Access Routers 41