From: Nigel Taylor (nigel_taylor@xxxxxxxxxxx)
Date: Fri Jan 19 2001 - 23:49:12 GMT-3
Julie Ann,
Not too sure exactly what's happening with this frame but I was looki
ng
around CCO and found this debug from a DLSW setup. It would seem that this
is typical traffic between the switch and the DLSW peers. You mentioned
that catalyst was in the reachability cache on your DLSW peers wich I guess
would explain why the frame is being sourced from the switch. Here's the
link.....watch the wrap...!
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/ibm_r/br
prt2/brdlsw.htm#xtocid2733318
Nigel...
>From: "Connary, Julie Ann" <jconnary@cisco.com>
>Reply-To: "Connary, Julie Ann" <jconnary@cisco.com>
>To: ccielab@groupstudy.com
>Subject: unidentified snap frame from catalyst keeping up isdn between
>dlsw peers
>Date: Fri, 19 Jan 2001 17:37:39 -0500
>
>Hi,
>
>can anyone tell me what these snap frames originating from a catalyst and
>going between my DLSW peers are:
>
>
>01:58:53: CSM: Received CLSI Msg : UDATA_STN.Ind dlen: 70 from DLSw Port0
>01:58:53: CSM: smac 0006.f418.e71d, dmac 8000.3033.3333, ssap AA, dsap AA
>01:58:53: BR0 DDR: ip (s=170.100.3.1, d=170.100.25.2), 170 bytes, outgoing
>inter
>esting (ip PERMIT)
>01:58:53: DLSW Received-ctlQ : CLSI Msg : UDATA_STN.Ind dlen: 112
>
>
>They are definitely SNAP frames and the are being sourced from the Catalyst
>I am using
>to setup ethernet vlans in my test networks.
>
>Are these Bridge BPDU's?
>
>Can they be safely filtered?
>
>I am doing some ddr testing for dlsw and I have determined that:
>
>1. you need to do dlsw netbios-keepalive-filter on both peers on either
>side of the isdn link
>2. you need to set the keepalive to 0 and the timeout to 90 on your remote
>peers.
>
>This will keep your link quiet, your netbios connection up and when other
>interesting traffic between the DLSW peers
>comes along, correctly invoke the isdn line.
>
>However these pesky snap packets are in the way. I notice that all my
>peers see the catalysts in their reachability
>cache's.
>
>Julie Ann
>------------------------------------------------------------------------
> Julie Ann Connary
> | | Network Consulting Engineer
> ||| ||| Federal Support Program
> .|||||. .|||||. 13635 Dulles Technology Drive,
>Herndon VA 20171
> .:|||||||||:.:|||||||||:. Pager: 1-888-642-0551
> c i s c o S y s t e m s Email: jconnary@cisco.com
>
>------------------------------------------------------------------------
>
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