[cisco-nas] AS 5800 SS7/RLM Errors

[Oliver Boehmer (oboehmer)]

> 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