Filter
Top Products
Configuring Subscriber-End Broadband Access Router Features
Configuring Routing
MC-643
Cisco IOS Multiservice Applications Configuration Guide
Verifying IP Address Configuration
To verify that you have assigned the correct IP address, enter the show arp command:
uBR924# show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 172.16.1.1 - 0009.0613.6030 ARPA cable-modem0
Internet 4.0.0.28 - 00e0.1ed7.524d ARPA Ethernet0
Troubleshooting Tips
To troubleshoot the configuration, perform the following tasks:
• Make sure you are using the correct IP address.
• Make sure the cable interface is not shut down. Use the show running-config command to check
the cable interface status.
Configuring Routing
DOCSIS-compliant transparent bridging is the factory default configuration of the Cisco uBR900 series
cable access router. To change the configuration of your cable access router from bridging to routing
using the CLI, use the following commands, beginning in global configuration mode:
Step 2
uBR924(config-if)# ip address 172.16.1.1
255.255.255.0
Assigns the appropriate IP address and subnet mask
to the interface.
Step 3
uBR924(config-if)# Ctrl-Z
uBR924#
%SYS-5-CONFIG_I: Configured from console by console
Returns to privileged EXEC mode.
This message is normal and does not indicate an error.
Command Purpose
Command Purpose
Step 1
uBR924(config)# interface cable-modem0
Enters interface configuration mode for the cable
access router interface.
Step 2
uBR924(config-if)# no cable-modem compliant bridge
uBR924(config-if)# no bridge-group 59
uBR924(config-if)# end
Turns off DOCSIS-compliant bridging.
Removes the default bridge group assignment from
the cable interface.
Returns to global configuration mode.
Step 3
uBR924(config)# ip routing
uBR924(config)# ip subnet-zero
uBR924(config)# ip route <IP address of CMTS>
<subnet mask of CMTS>
Enables IP routing for the cable access router.
Enables the use of subnet zero for interface addresses
and routing updates.
Creates a static route to the CMTS to make sure that
ToD packets are properly routed out of the cable
access router.
Step 4
uBR924(config)# router rip
Enters router configuration mode and enables RIP on
the cable access router.