RE: Filtering routed protocols.

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#177

From: Allen Robel
Date: Fri, 23 Mar 1990 02:20

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> (1) Can we use some sort of filter to insure that protocols other than
> SNA are not bridged?  I'm thinking both of protocols not supported by
> cisco and protocols that are supported for routing, but don't happen to
> be enabled on a particular router.  One of the major reasons that I
> like routers is the isolation they provide.  I don't want to lose that.

You can use access lists for this.

For instance, if you want to filter AARP Apple Address Resolution
Protocol on ethernet 0, you would use the ethertype for this protocol
(803f hex) like:

interface ethernet 0
bridge-group 1
input-type-list 201

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!ncar!boulder!daemon
From: robelr@bronze.ucs.indiana.edu (Allen Robel)
Newsgroups: comp.dcom.sys.cisco
Subject: RE: Filtering routed protocols.
Message-ID: <18754@boulder.Colorado.EDU>
Date: 23 Mar 90 02:20:38 GMT
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