Modem Bonding Issue on Cisco 10K CMTS "a WB cap but online CM" |

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Modem Bonding Issue on Cisco 10K CMTS "a WB cap but online CM"

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Modem Bonding Issue on Cisco 10K CMTS "a WB cap but online CM"
Plain text icon Modemerr.txt20.85 KB

I ran a debug (registration,tlv) on a modem thats not bonding and found the following unique message: RCP index = 3; a WB cap but online CM 7871.9cf2.1d21
What is a WB cap? I cannot find any info about it online and there doesn't seem to be any impaired channels. Other modems are bonding fine in the nearby area, so Im assuming a bad modem/drop but im curious about this message.
I've attached the debug log.seem Its a Cisco 10K PRE5 running SCJ2a. Thanks in advance!

wideband capable modem is

wideband capable modem is what WB cap means,

It is basically saying a modem that is capable of bonding, but is not actually bonding... could have many reasons, but if below command does not work, you should check your bonding groups carefully.

add this command in config
cable wideband auto-reset

here is the blurb from cisco's manual

Usage Guidelines
Use this command to enable wideband auto-reset mode on the CMTS. If wideband auto-reset mode is enabled, wideband cable modems registered on a cable interface as traditional DOCSIS modems (DOCSIS 1.x/2.0 modems) are auto-reset when the cable interface becomes wideband-capable. When a wideband cable modem auto-resets, it deregisters on the CMTS as a traditional DOCSIS cable modem and immediately attempts to re-register as a wideband cable modem.

A cable interface is considered wideband-capable when at least one fully configured and operational wideband channel has been associated with the interface’s traditional DOCSIS (narrowband) channel.

For a fully configured wideband CMTS, wideband cable modems may register as traditional DOCSIS modems for a variety of reasons, such as cable interface line card boot order or line card online insertion and removal (OIR). Rather than defer wideband cable modem registration, wideband cable modems are permitted to register as traditional DOCSIS modems.

If a wideband-capable modem registers as a traditional DOCSIS modem, it registers on a primary downstream channel that has been assigned with the downstream cable command to the modem’s fiber node if the fiber node is configured. If the modem’s fiber node is not configured, the wideband-capable modem can register on any downstream channel that is visible to it (as a traditional cable modem does).

In Cisco IOS Release12.3(21)BC, the primary downstream channel is a traditional DOCSIS downstream channel for the fiber node. Beginning in Cisco IOS Release 12.3(23)BC, either an RF channel from the SPA or a Cisco uBR10-MC5X20 downstream channel serves as a primary channel in a fiber node. Beginning in Cisco IOS Release12.3(23)BC if the primary downstream channel for this fiber node is assigned from a SPA downstream, then the downstream cable command is not required.
When and if a cable interface becomes wideband capable, wideband cable modems that have registered as traditional DOCSIS modems are reset for CMTS routers with wideband auto-reset mode enabled. These modems are only reset when the interface first becomes wideband-capable and are not reset again if they subsequently fail to register as wideband cable modems.

you can also kickstart the process after applying the config by running

clear cable modem registered-traditional-docsis reset

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