Ping time out when using VMotion

[denz1217]

Hi All,

It seems that I'm getting a single or a couple ping timed out result when doing Vmotion from one node to another. Basically, I run ping -t on the virtual machine and then do a live migrate (VMotion). All seems fine except that I get a timed out result. I tried hard-coding the NIC speed of my vmkern and using auto-negotiate, however, the problem persists. I've also installed the vmtools on the test windows 2003 virtual machine. Am I missing something here?

Thanks and regards,

Dennis

[weinstein5]

a dropped packet or two can actually happen - the nature of the tcp/ip network will allow it to recover

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[runclear]

a single ping "timeout" is typical & Expected of a vmotion... nothing to worry about.

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[caciolli · Accepted solution]

Yes, the single ping timeout is expeted, I think this is mostly due to the arp cache (mac address tables) on the physical switches.

The 'notify switch' option does not change this behavior.

[denz1217]

Hi Guys,

Thanks ya'll for your responses. I now feel relieved. The demo at http://blip.tv/file/738911 got me to believe and expect that there shouldn't be droping of packets during Vmotion.Thanks again to everyone who replied.

[mouse77]

Hi,

It is wrong to miss packets. when that happens is some physical problem

on network or is working with SAN to verify performance.

We found this problem, but was identified when the SAN works with poor or low perfermonce.

Regards.

Edgardo morgan

[satish_lx]

Dont warried its good sign... means somthing going on at VMotion side in my network i am gettting 3 timeout problem is at VMotion time system put whole machine in Memory bit map and then transfer that bit map to destination machine so that time only you got timeout and its depend on your network speed so its not a problem.

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Thanks

Satish Patel

• Journey toward "Virtual world"