All things related to multicast

[Peter John Hill <>]

We thank you for beta testing this software for us... If I picked the  
correct image.. this image was released 01-MAR-2006.

Well, you should open a ticket up with Cisco so that they can file a  
bug. I did not find any obvious candidates, so it looks new.

In the mean time, what features do you need in 12.4(7)? Do you need  
12.4 in general? In fact, do you need 12.3? Many more bugs have been  
fixed in 12.2 (and 12.3). They have been found by people who want to  
run the latest code. Just the fact that it is only a (7) release  
makes me scared.. That is 7 patches. Not too many.

Peter



On Mar 23, 2006, at 8:21 AM, Michael Forrest wrote:

> Has anyone seen the following issue with Cisco router running ipv4
> multicast?
>
> The log messages just seem to be full of the following msg:-
>
> Mar 20 16:05:38 door.erg.abdn.ac.uk 299: *Mar 16 06:39:31.369 UTC:
> %MROUTE-6-UNSUPPORTED_SAP_FORMAT: Received unsupported format SAP  
> message
> from (129.116.74.139)
>
> The MFIB (multicast forwarding information base) seems to have a  
> memory leak
> and eventually consumes all the memory available on the router. The  
> router
> becomes inaccessible on the console and over the network and  
> requires a
> power cycle to recover. Although strangely enough, still seems to be
> functional (if just unaccessible).
>
> A show ver from the router yields (it's a Cisco 2621XM):-
>
> Cisco IOS Software, C2600 Software (C2600-ADVENTERPRISEK9-M), Version
> 12.4(7), RELEASE SOFTWARE (fc6)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Tue 28-Feb-06 23:32 by alnguyen
>
> Doing a show proc memory shows that it seems to consume about 1MB  
> of memory
> every 4-5hours until the router just falls over.
>
> All the unsupported SAP messages come from a cluster of machines with
> similar names to:-
>
> vbrick-cma5136.communication.utexas.edu
>
> Anyone had/solved this issue before?
>
> -Michael
>
> --
> Michael Forrest,
> Directorate of Information Systems and Services,
> University of Aberdeen.
>
> Tel: +44-1224-273392