Mailing List Archive: AS 5800 SS7/RLM Errors

I have an AS5800 running version 12.2(13)T5. We are using the SC2200 / SS7 solution and get many of the following error messages noted below. It seems to increase especially under heavier load. 95% of the error messages are the %ISDN-6-CHAN_UNAVAILABLE:

026220: Nov 27 20:01:28.215: %ISDN-4-RLM_STATUS_CHANGE:ISDN SC Se1/1/0:19:23 SC: Status Changed to: Link Recovered.

026221: Nov 27 20:09:15.869: %ISDN-6-CHAN_UNAVAILABLE: Interface Se1/1/0:19:23 SC Requested Channel 5 is not available

026222: Nov 27 20:15:11.650: %ISDN-4-RLM_STATUS_CHANGE: ISDN SC Se1/1/0:19:23 SC: Status Changed to: Link Recovered.

026223: Nov 27 20:31:36.761: %ISDN-4-RLM_STATUS_CHANGE: ISDN SC Se1/1/0:19:23 SC: Status Changed to: Link Recovered.

026224: Nov 27 20:37:48.839: %ISDN-6-CHAN_UNAVAILABLE: Interface Se1/1/0:19:23 SC Requested Channel 15 is not available

We've experienced this problem with multiple IOS versions on the 5800. It doesn't seem to be service impacting, but it does fill our logs up.

Any insight?

Thanks,

Dave

**DISCLAIMER
This e-mail message and any files transmitted with it are intended for the use of the individual or entity to which they are addressed and may contain information that is privileged, proprietary and confidential. If you are not the intended recipient, you may not use, copy or disclose to anyone the message or any information contained in the message. If you have received this communication in error, please notify the sender and delete this e-mail message. The contents do not represent the opinion of D&E except to the extent that it relates to their official business.

> I have an AS5800 running version 12.2(13)T5. We are using the SC2200
> / SS7 solution and get many of the following error messages noted
> below. It seems to increase especially under heavier load. 95% of
> the error messages are the %ISDN-6-CHAN_UNAVAILABLE:

you might want to check your SC2200 configuration and verify if your
release-mode is set to "Sync"
(http://www.cisco.com/univercd/cc/td/doc/product/access/sc/rel7/relnote/
rn7412.htm#xtocid2075171). Maybe there is also an inconsistency in the
channel state. This ISDN-6-CHAN_UNAVAILABLE happens if the AS5800 still
considers a channel as occupied while the SC2200 considers the CIC as
being available.
Which SC2200 version are you using?

> 026220: Nov 27 20:01:28.215: %ISDN-4-RLM_STATUS_CHANGE:ISDN SC
> Se1/1/0:19:23 SC: Status Changed to: Link Recovered.

Here you had a problem with the IP connectivity between the SC and the
AS5800 so RLM failed over to the other connection.

> We've experienced this problem with multiple IOS versions on the
> 5800. It doesn't seem to be service impacting, but it does fill our
> logs up.

The ISDN-6-CHAN_UNAVAILABLE is service impacting, the call in question
received a fast-busy so the user had to re-connect.

oli