From: Virnoche, Phil (phil.virnoche@xxxxxxxxx)
Date: Fri Jan 19 2001 - 19:57:44 GMT-3
I think CDP uses snap ?
Philip G. Virnoche CCNA
Network Engineer - AT&T Wireless
phone: 425.580.5239
cell: 206.601.3134
"HAM AND EGGS - A day's work for a chicken; A lifetime commitment for a
pig."
-----Original Message-----
From: Connary, Julie Ann [mailto:jconnary@cisco.com]
Sent: Friday, January 19, 2001 2:38 PM
To: ccielab@groupstudy.com
Subject: unidentified snap frame from catalyst keeping up isdn between
dlsw peers
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
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Julie Ann Connary
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c i s c o S y s t e m s Email: jconnary@cisco.com
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