Table Of Contents

Troubleshooting the Wideband SPA

General Troubleshooting Information

Interpreting Console Error Messages

Using debug Commands

Using show Commands

Troubleshooting SPA-to-EQAM Communication Problems

Preparing for Online Insertion and Removal of a SPA

Troubleshooting the Wideband SPA

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This chapter describes techniques that you can use to troubleshoot the operation of the Wideband SPA. It includes the following sections:

•General Troubleshooting Information

•Troubleshooting SPA-to-EQAM Communication Problems

•Preparing for Online Insertion and Removal of a SPA

For information on troubleshooting a wideband cable system, see the Cisco Cable Wideband Solution Design and Implementation Guide, Release 1.0.

For information on troubleshooting the wideband CMTS, see the Cisco uBR10012 Broadband Router Software Configuration Guide.

General Troubleshooting Information

This section describes general information for troubleshooting SIPs and SPAs. It includes the following sections:

•Interpreting Console Error Messages

•Using debug Commands

•Using show Commands

Interpreting Console Error Messages

To view the explanations and recommended actions for Cisco uBR10012 router error messages, including messages related to the Wideband SPA, refer to the following documents:

•Cisco CMTS System Messages

•Cisco IOS Software System Messages, Cisco IOS Release 12.3

System error messages are organized in the documentation according to the particular system facility that produces the messages. The Wideband SPA error messages use the facility name SPAWBCMTS.

Using debug Commands

Along with the other debug commands supported on the Cisco uBR10012 router, these wideband-specific debug commands are:

•debug hw-module bay—Enables debugging information for a Wideband SPA.

•debug cable fn—Enables debugging information for cable fiber nodes.

•debug cable wbcmts—Enables debug information for the wideband CMTS.

The debug commands are intended for use by Cisco Systems technical support personnel. For more information about the debug hw-module bay and the debug cable wbcmts command, see Chapter 11, "SIP and SPA Commands."

For information about CMTS debugging and the cable-specific debug commands supported on the Cisco uBR10012 router, refer to the Cisco Broadband Cable Command Reference Guide and any related feature documents for the applicable Cisco IOS Release.

Using show Commands

There are several show commands that you can use to monitor and troubleshoot the SPAs on the Cisco uBR10012 router. This chapter describes using some Cisco IOS commands that may be helpful in troubleshooting the Wideband SPA.

Table 9-1 provides information about additional show commands to verify and monitor SPAs.

Table 9-1 show Commands for Wideband SPAs

show Command	Where to Find Information
show cable mac-domain downstream-service-group	show cable mac-domain downstream-service-group, page 11-37
show controllers modular-cable	show controllers modular-cable, page 11-41
show hw-module bay	show hw-module bay, page 11-44
show hw-module bay oir	show hw-module bay oir, page 11-49
show interface wideband-cable	Specifying Wideband Channels, page 8-4

Troubleshooting SPA-to-EQAM Communication Problems

If a Wideband SPA is unable to communicate with an edge QAM device, check that the RF channels set with the rf-channel command match the values required by the edge QAM device. You can use the show hw-module bay command to see the values that have been configured for an RF channel. For example:

Router# show hw-module bay 1/0/0 config rf-channel 0 verbose 

SPA                                 : Wideband-Cable 1/0/0

RF channel number                   : 0

Frequency                           : 699000000 Hz

Modulation                          : 64qam

Annex                               : B

IP address                          : 192.168.200.30

MAC address of EQAM                 : 000c.3033.2cbf

UDP port number                     : 49152

EQAM headroom                       : 0

Check that the following values are correct and match what is configured on the edge QAM device:

•Frequency—The center frequency for this RF channel.

•IP address —The IP address of the edge QAM device for this RF channel.

•MAC address —The MAC address of a next-hop router or edge QAM device for this RF channel.

•UDP port—The UDP port number for the QAM output port for this RF channel.

RF channels are configured with the rf-channel command. In the rf-channel command, the value used for mac-address in the mac-address argument is as follows:

•If a Gigabit Ethernet router or Layer-3 switch is used between the Wideband SPA and the edge QAM device, the value specified for mac-address is the MAC address for the next-hop interface on the router or Layer-3 switch.

•If a Gigabit Ethernet router or Layer-3 switch is not used, the value specified for mac-address is the MAC address for Gigabit Ethernet interface on the edge QAM device.

The UDP port number set for the RF channel allows mapping an input UDP session to a specific QAM output port. Wideband traffic from different Wideband SPAs cannot be mixed on the same QAM output ports.

Preparing for Online Insertion and Removal of a SPA

The Cisco uBR10012 router supports online insertion and removal (OIR) of the SIP, in addition to each of the SPAs. Therefore, you can remove a SIP with its SPAs still intact, or you can remove a SPA independently from the SIP, leaving the SIP installed in the router.

This means that a SIP can remain installed in the router with one SPA remaining active, while you remove another SPA from one of the SIP bays (subslots). If you are not planning to immediately replace a SPA into the SIP, then be sure to install a blank filler plate in the bay. The SIP should always be fully installed with either functional SPAs or blank filler plates.

For more information about activating and deactivating SPAs in preparation for OIR, see the "Preparing for Online Insertion and Removal of SIPs and SPAs" section on page 5-2.