RE: CLNS - ISIS Traffic

From: Alexander Arsenyev (GU/ETL) (alexander.arsenyev@ericsson.com)
Date: Mon Mar 28 2005 - 15:51:24 GMT-3

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On LAN media (Ethernet/FE/GE) - depending on platform - You can use:

1) VLAN map with MAC extended access-list matching on lsap 0xFE
2) MAC extended access-list matching on well-known ISIS multicast MAC addresses (exercise left to the reader).

AFAIK, there is no way of filtering CLNS/ISIS on PPP/Frame Relay/HDLC interfaces UNLESS You play with mtu/ip mtu/hello padding to prevent ISIS Hellos from being recognised, see http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00801e1e2b.shtml
Ignoring ISIS Hellos due to MTU mismatch breaks the ISIS adjacency/ISIS adjacency does not form.
HTH,
Cheers
Alex

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]
Sent: 26 March 2005 13:47
To: ccielab@groupstudy.com
Subject: CLNS - ISIS Traffic

Hi

What is the correct filter for the CLNS - ISIS traffic? Thanks.

Mauricio

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