RIPv2 can use multicast for its routing traffic.  If you have a router
configured to use RIPv2 then it is likely it is sending multicast packets.
routed may generate these as well, I guess.

John Wiltshire

> -----Original Message-----
> From: Simon Bryan [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, 29 June 2000 3:49 pm
> To: [EMAIL PROTECTED]
> Subject: [SLUG] IGMP
> 
> 
> Hi,
> While digging around in my Switch logs, I found some ports 
> having a number of IGMP 
> packets associated with them, about 5 out of 40. I am not 
> 100% sure on IGMP but my 
> quick reading says it 'allows Internet hosts to participate 
> in multicasting'.
> Is this a concern? What type of applications (on aschool 
> network) would be doing 
> multicasting?
> 
> Cheers,
> 
> 
> --
> Simon Bryan                    [EMAIL PROTECTED]
> Information Technology Manager [EMAIL PROTECTED]
> OLMC Parramatta
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