Virtual machine nics stop responding after migration

[Ravi1987]

Hi experts,

i m using esx 3.5 update 4 environment with 5 ESX server (IBm 3650 with Broadcom nic). problem is that when i migrate ome machine from one server to other server they stop responding . means migration is complete but they are not pingable from network. this is very critical.

[weinstein5]

Make sure that the both server's networks are configured the same way - in other words that the virtual switch the vm connects to on the other host an get to the same network segment it was connected to on the originating host

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[AndreTheGiant]

Be also sure that the network label is the same on both ESX.

Check in VM / Properties after you have moved the VM to see if you loose the label.

Andre

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[Ravi1987]

Thanks for reply.

Everything is same on all server as far as network setting /labels are concerned

[MALIK_ADEEL_IMT]

asuming you are talking about the service console IP address you need to use

esxcfg-vswif

check

vi/etc/sysconfig/network

GATEWAY=<new gateway ip>

then run this

service network restart

that should be it!

Principle System Engineer

NetSol Technologies

Lahore Cantt Pakistan

54792

[AndreTheGiant]

Do you have other VM on destination ESX that are working on the same network? Their network connectivity is fine?

Andre

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[Ravi1987]

Yes Andre ,

Virtual machine network part wors fine until i do vmotion.

proces is that last day we do some maintenance with one of the server ragarding ram upgradtion. for that i put that server under Maintenance mode ..all machine randomely moves to another server but when hey moved they vstart unresponding .

Ravinder

[AndreTheGiant]

Virtual machine network part wors fine until i do vmotion.

But works fine on both ESX?

Could be a problem at physical switch level (maybe STP). Do you have a single core switch?

Andre

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[Ravi1987]

I have One core switch attached to all esx server.

[AndreTheGiant]

Have you enabled RSPT or Fast SPT?

Andre

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[Ravi1987]

Is that stp or spt

spanning tree protocol

[AndreTheGiant]

spanning tree protocol

Yes, STP.

Enable the Rapid or the Fast version.

Andre

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[Ravi1987]

Is there any Relation between thease two (Migration ,vmotion and STP)

because before 1 month everything with same conf running fine.

Ravinder

[AndreTheGiant]

Is there any Relation between thease two (Migration ,vmotion and STP)

Yes.

because before 1 month everything with same conf running fine.

What is changed in the last month?

You say memory, but if VM works fine memory is not the problem.

If you do a cold migration the VM will work?

Andre

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[Ravi1987]

We hav'nt tried with cold migration .but why it is commming

and wha are the possible cause so we can try some trouble shooting.

[AndreTheGiant]

If you are sure that virtual networking is working on all ESX, and is configured in the same way an all ESX, and NIC are working fine...

...then a possible cause is that physical switch can understand the network change during VMotion (arp table must change inside switch).

Andre

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[Siemens-CH]

Hi

Which type of switch do you have? If you have a Cisco switch, check Port-Security on the Ports. We had the same problem. We deactivated Port-Security and bingo, problem was resolved.

Greez

Patrick