Re: Appletalk Phase II / SNAP

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#589

From: John Sherwood
Date: Tue, 21 Aug 1990 15:06

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John:
 
>Here at Indiana Univ we are having difficulty filtering out SNAP format
>packets from Phase II devices on our network. The environment is IP routed,
>Appletalk Phase I routed, all else bridged. In order to test out Phase II
>devices/gateways, we would like to be able to isolate by packet filtering
>the Phase II packets. Any Ideas?
>
>John Stigall
>Indiana Univ.
 
We were faced with the same problem. The only solution we could come up
with was to permit each protocol we wanted and then to deny all others.
Since we only needed to bridge DECnet, LAT and LAD, our access list was:
 
access-list 201 permit 0x6000 0x000f
access-list 201 permit 0x8041 0x0000
access-list 201 deny   0x0000 0xffff
 
Hope this helps.
 
John Sherwood
Dalhousie University
Halifax, Nova Scotia

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!wuarchive!usc!rutgers!ub!boulder!daemon
From: SHERWOOD@AC.DAL.CA (John Sherwood)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: Appletalk Phase II / SNAP
Message-ID: <24973@boulder.Colorado.EDU>
Date: 21 Aug 90 15:06:37 GMT
Sender: daemon@boulder.Colorado.EDU
Lines: 24