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Troubleshooting Tips for the Cisco uBR924 Cable Access Router 3
Prerequisites
In order to use the Cisco uBR924 cable access router for data-over-cable applications, the following
conditions must be met:
•The Cisco uBR7200 series universal broadband router or other DOCSIS-based CMTS must be
installed at the cable headend and configured. Refer to the Cisco uBR7246 Installation and
Configuration Guide or the Cisco uBR7223 Installation and Configuration Guide for detailed
information.
•The Cisco uBR924 cable access router must be physically installed and cabled as follows:
—To the headend via CATV coaxial cable
—To at least one PC via the straight-through yellow Ethernet cable supplied with the cable
access router. Refer to the Cisco uBR924 Cable Access Router Quick Start Guide for detailed
information.
•The PC(s) connected to the Cisco uBR924 cable access router must be configured for Internet
Protocol (IP).
•The cable service provider must have a correctly configured network DHCP server and
Electronic Industries Association (EIA) downstream channel.
•Cisco IOS Release 11.3(4)NA or later must be running on the Cisco uBR924 cable access router.
When the cable access router is up and running, you can display the IOS release number by
entering the show version command from user EXEC mode.
Note If the Cisco uBR7246 universal broadband router at the cable headend is using MC16 modem
cards, Cisco IOS Release 11.3(7)NA or later must be running on the Cisco uBR924 cable access
router.
In order to use the Cisco uBR924 cable access router for VoIP-over-cable applications, the following
additional conditions must be met:
•Cisco IOS Release 12.0(4)XI1 or higher must be running on the Cisco uBR924 cable access
router.
•In order to run VoIP Fax, the uBR924 cable access router must be configured for voice and you
must be using Cisco IOS Release 12.0(5)T or higher.
•For multiple CoS (class of service) support, the CMTS must allow the definition of multiple
service identifiers (SIDs) on the upstream. If the CMTS is a Cisco uBR7200 series universal
broadband router, Cisco IOS Release 12.0(4)XI1 or higher must be used on the headend router.
•The Cisco uBR924 must be configured to operate in routing mode.
Supported MIBs and RFCs
The Cisco uBR924 cable access router supports the following MIBs and RFCs:
•Cisco Standard MIBs:
—Cisco Product MIB
—Cisco Chassis MIB
—Cisco Syslog MIB