[cisco-nas] AS 5800 SS7/RLM Errors / AS5300 C7 signalling configuration

[Helen M. Robison Voice SPSE]

First of all, the SC2200 had a product name change well more than a year ago to
the PGW 2200, so it will help in your debugging &/or looking for Cisco 
assistance for
all to use that name.

Secondly, this "signaling mode" or "nailed" method of SS7 interconnect is only
one method.  I assume it's what you wanted to do, but for general notice, one
can also do SS7 interconnect with the voice gateways controlled via MGCP by
either the PGW 2200 in switched mode or with the BTS 10200.

When using the PGW, 2200 mode, I would recommend using SCTP rather than RLM
for the gateway/PGW 2200 interface.

Thirdly, you should be looking at debugs on the PGW 2200 as well as on the
gateway for your "channel unavailable" problem.  You may have a span/nfas 
interface
mismatch or some other configuration mismatch which is causing the PGW 2200
to take the channel out of service.  At any rate, merely looking at the 
gateway is not
sufficient.

For general information on configuation & debugging, (currently supported 
software for
the PGW 2200 is 9.3(2)), see:
http://www.cisco.com/univercd/cc/td/doc/product/access/sc/rel9/

SS7 Solution information:
http://www.cisco.com/univercd/cc/td/doc/solution/dialvoic/

Best regards,
Helen Robison


At 04:15 PM 11/28/2003 +0100, Oliver Boehmer (oboehmer) wrote:

> > 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
>
>_______________________________________________
>cisco-nas mailing list
>cisco-nas at puck.nether.net
>https://puck.nether.net/mailman/listinfo/cisco-nas


Helen M. Robison                                email: hrobison at cisco.com
Voice Technical Marketing Engineer              direct: (408) 526-8938
Service Provider Solution Engineering (SPSE)    mobile: (408) 666-9027
Cisco Systems, SJ-17/1                          pager: (800) 365-4578

Time wastes too fast:  every letter I trace tells me with what
rapidity Life follows my pen: the days and hours of it ...
flying over our heads like light clouds of a windy day,
never to return more.... [L. Sterne]