Re: ip multicast boundary [filter-autorp]

From: Tim Chan (timanji@yahoo.com)
Date: Fri Sep 01 2006 - 05:40:40 ART


Thanks Petr!

-tim

----- Original Message ----
From: Petr Lapukhov <petr@internetworkexpert.com>
To: Tim Chan <timanji@yahoo.com>
Cc: ccielab@groupstudy.com
Sent: Friday, September 1, 2006 1:32:17 AM
Subject: Re: ip multicast boundary [filter-autorp]

Hi Tim,
 
 the idea is that filter-autorp filters "denied" groups from Auto-RP
 messages, hence permitting Auto-RP announces to pass-through
 boundary, but cutting out certain unwanted groups.
 
 HTH

2006/9/1, Tim Chan <timanji@yahoo.com>: Hi all,

I'm not 100% sure what the "filter-autorp" keyword means.

It's applied after the acl, so does that mean that for those prefixes in the acl
it will also block auto-rp messages for those specific prefixes?

So if I'm trying to block auto-rp messages from being sent out to a backbone
router...are these the same then?

access-list 10 deny 224.0.1.39
access-list 10 deny 224.0.1.40
access-list 10 permit any
!
interface ethernet 0/0
  ip multicast boundary 10

vs.

access-list 10 deny 224.0.0.0 15.255.255.255
access-list 10 permit any
!
interface ethernet 0/0
  ip multicast boundary 10 filter-autorp

Any comments would be helpful..
-tim



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