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ESXi and Cisco Switch issue

post #1 of 8
Thread Starter 
Has anyone ever had their switch get frozen because of a vm host?

Recently we have put a new server that is running ESXi with 6 vm's running and the cisco switch we have seems to get confused and freezes; knocking the entire lan portion of our network down.

It is an older switch, C-2980g, but hasn't shown any problems until now.

I'm fairly sure it is the switch causing it since right now I have the VM host connected directly to the lan side of the router we have, and it is not having any problems.

Anyone ever experience this?
post #2 of 8
I have about 200 virtual servers and a few hundred switches on our network, and have never seen a problem like that being caused by a VM host. It's most likely a problem with the switch itself.
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post #3 of 8
Sounds like a failing switch to me.

What makes you think it's the VMs?
post #4 of 8
You double check the configs? Namely if you intend to have trunking used, but it is not properly configured in the switch and is causing a loop.

Check the configs for loops and such, but generally when a network device goes down when handed a moderate to heavy load, the network device should be replaced or relegated to be used in a test/non-essential environment where downtime has little meaning.
    
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post #5 of 8
I agree with trueg, check your configs.

Reminds me of a few months ago at work there were some changes made to a switch that connected to heavy-traffic servers, and for whatever reason the updated config didn't have filtering in place on one of the vLANs said servers were on - took that entire side of the network down in a jiffy.
    
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post #6 of 8
Thread Starter 
All the configs check out. I'm sure it is the switch causing it. Since there are multiple vm's on this machine, could it be something to do with spanning tree?
post #7 of 8
I doubt it, but possible. How many NICs do you have dedicated to VM traffic?
    
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post #8 of 8
Thread Starter 
Quote:
Originally Posted by TurboTurtle View Post
I doubt it, but possible. How many NICs do you have dedicated to VM traffic?
Just 1 since a majority of the traffic is done between the VM's. There is a very small amount of traffic outside of the VM's.
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