All things related to multicast

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Peter, I've seen this problem before. It came up a few years ago when I was
building out a large service provider network. If I remember correctly, the
solution was a software/line card upgrade. This a line card limitation. Best
way to handle it is to keep multicast traffic to a minimum, try tunneling
multicast with GRE and configure routing protocols to use unicast updates.
The link below should give you some more information.

http://www.cisco.com/warp/public/770/fn13171.shtml

Artie


----- Original Message ----- 
From: "Peter Gutierrez" 
<>
To: 
<>
Sent: Wednesday, March 24, 2004 10:15 AM
Subject: Multicast traffic causes unicast drops in cisco 15454 SONET mux?


> My Internet 2 traffic is using a new circuit provisioned by a provider
> that I Wil^H^H on't Tel the name of here, who is claiming that some
> small but persistent unicast packet loss is caused by a problem
> handling PIM traffic. We connect to what they call a Cerent box, which
> I assume is the cisco (that borg'ed Cerent) ONS 15454 SONET mux, via
> GigEthernet, that is carried around the SONET ring in an OC12 slice,
> average traffic rate 100Mbs, and hands off GigE to a cicso 6509 router.
> Does anyone else have the same transport system, with problems caused
> by multicast traffic?
>
> -- 
> Peter Gutierrez  OIT/Network Services  U. Massachusetts Amherst
> Voice: 413 545 1606   Fax: 413 545 3203    
> 
> Opinions?  "Ain't nobody's business but my own" - Irving Taylor