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тАО06-23-2006 07:53 AM
тАО06-23-2006 07:53 AM
We are using a 6400 with 10GB as the core, 3 3400s uplinked to the 6400 at 10GB and 2600's uplinked to the 3400's at 1000T. Our firmware is up to date on all switches, we have qos on the voice vlan (qos dscp 101110), and I have on all the ports on the 6400 broadcast throttling (broadcast-limit 30).
The network monitors do not seem to show the bandwidth maxing out, it is high, but no where near maxed.
Any ideas on how to manage this so it does not take down the entire network?
Thanks
Solved! Go to Solution.
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тАО06-23-2006 11:22 AM
тАО06-23-2006 11:22 AM
Re: Multicast slowdowns
With the broadcast limiting it also limits multicast traffic, so the first thing I would test would be removing that.
With it enabled, I suspect the CPU is shooting up which is causing your latency issues. Before disabling the broadcast-limit you could keep an eye on the CPU usage of the switches and try ghosting again to verify.
Don't forget to assign points to any replies you get, even if they don't solve your problem immediately you should assign at least a few points for the persons effort.
Matt
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тАО07-04-2006 10:33 PM
тАО07-04-2006 10:33 PM
Re: Multicast slowdowns
We use Ghost a lot and noticed that due to the nature of the system, Ghost was trying to multicast all of its communication but because we didn;t have IGMP enabled the multiocast was being treated as a broadcast and causing the network to slow down.
It was interesting to look at, our port utilization would shoot up as soon as the ghost sessions was started...
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тАО07-05-2006 12:41 AM
тАО07-05-2006 12:41 AM
Re: Multicast slowdowns
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тАО07-05-2006 02:35 AM
тАО07-05-2006 02:35 AM
Re: Multicast slowdowns
If I enter the command igmp delayed-flush nnn where nnn is a number from 0-255... does anyone recommend a good value to try... since it is our core switch and 58 sites go thru it to reach the internet, I would like to proceed with caution before changing anything on it.
Thanks
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тАО07-05-2006 09:48 AM
тАО07-05-2006 09:48 AM
SolutionHave a read through this thread:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1008022
I'm going to say you should assign some points to replies again even though the message doesn't seem to be getting through.