[nsp] Speaking of Multicast

[Erik L. Montemer]

Here's something that might help you out, in our infrastructure we've got a variety of switches, along with our customer networks in which the Catalyst flavour varies...

http://www.cisco.com/en/US/tech/tk828/tk363/technologies_tech_note09186a0080122a70.shtml 


--erik 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Kristofer Sigurdsson
Sent: Wednesday, May 19, 2004 11:58 AM
To: Gert Doering
Cc: cisco-nsp at puck.nether.net; sthaug at nethelp.no
Subject: Re: [nsp] Speaking of Multicast

Gert Doering, Wed, May 19, 2004 at 06:58:45PM +0200 :
> Hi,
> 
> On Wed, May 19, 2004 at 04:52:02PM +0000, Kristofer Sigurdsson wrote:
> > > Isn't it the case that newer boxes (e.g. 3550) do IGMP, older 
> > > boxes do CGMP? At least that's how I think of it.
> > We're using CGMP on 3550 boxes...
> 
> CGMP as a router, or CGMP as a switch?
> 
> I know about CGMP-as-a-router (so the 3550 is the L3 device, that's 
> telling *other* L2 devices where to send multicast packets to), but to 
> my knowledge, CGMP-as-a-switch (the 3550 listens to a separate L3 
> router) is not supported.
> 
> *If* it is, I stand corrected, and apologize...

Sorry, my bad, should have noted that we are using the 3550 boxes as 3rd layer devices (I'm not very inclined to calling these things "routers" :D).

-- 
Kristófer Sigurðsson		   | Tel: +354 525 4103 / MSN: ks at rhi.hi.is
Netsérfræðingur/Network specialist | Reiknistofnun HÍ/University of Iceland _______________________________________________
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