Thanks all
That's literally all the info I have just now, it's a client network I
may have to go look at. Just figured I'd toss it out and see if
anybody had a screamer of a disclaimer on that hardware.
I'll see how much more Ivan find out before I being this world of pain
down on myself :)
Sent from my iPhone
On Aug 18, 2008, at 9:33 AM, Paul Cosgrove <[EMAIL PROTECTED]>
wrote:
Hi Christian,
You will need to explain more about the topology, your multicast setup
and the traffic flows, for instance:
- Are the foundary switches acting as your RPs?
- Have you any other commands applied which will cause multicasts to
be
process switched?
- Do you have high rates of multicast on the network?
- Are you using any multicast groups which will appear the same as
well
known multicast groups at Layer 2 (e.g. x.0.0.1, x.0.0.2 etc)?
If the Foundary switches are your RPs, the requirement to decapsulate
register messages could explain why these are affected much more than
your 6500s, 3750s and netscreens. 'ip pim register-rate-limit 5'
applied to the cisco designated routers will help if that is the
problem
(not sure about equivalent netscreeen command).
Paul.
Christian MacNevin wrote:
Hi
I've only got the most superficial of ideas what's going on with this
network, but i've been asked if there's any particular reason
some Foundry switches would be being brought to their knees every
time
mcast is switched on in a network. 65s, 3750s and Netscreens
all handle it fine.
Given Foundry's marketing, they dobrag that everything's handled in
port-based ASICs, but obviously it sounds like this stuff is going
to the processor. Maybe it's PIM Sniffing not supported in
hardware, not
sure.
Anyway, sorry for the amazing vagary here, but it's all I've got
right
now. Any thoughts?
Cheers
Christian_______________________________________________
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