topic Re: VM power off when cable red is crash HA in VMware User Group (VMUG) Discussions

VM power off when cable red is crash HA

guson99 — Thu, 20 Jan 2011 18:58:14 GMT

Hi, I'm new in this platform and I installed Vphere 4.1, my environment is:
1 Storage
3 host
1 Vcenter with Datacenter created
The problem is in the HA apparently, I configured HA and now test my environment before going to productive.
I configured all vswitch with 2 nics, both to 1GB.
Today I change the cable of one nic of the HOST 1 and the VM in host 1 continuous running OK, but when I reconnect the cable in the nic, the VMWARE POWER OFF my VM and restarted in the same HOST 1.
Why occurs this if my second nic of host 1 never lost connection?
is this correct or my vm never has power off?

Sorry by my english is not very good.
Regards.

Re: VM power off when cable red is crash HA

cSonnierEsxi — Thu, 20 Jan 2011 22:23:51 GMT

How are you secondary nics setup in your vSwitch? Standby, Active, etc.

Re: VM power off when cable red is crash HA

a_p_ — Thu, 20 Jan 2011 23:01:45 GMT

Unless you configured something special, there may only be two reasons for this:

the physical switch ports are not configured for spanning-tree portfast
you did not increase the isolation response time - HA advanced settings -> das.failuredetectiontime = 30000 (30 sec)

The 30 sec are best practice and may be adjusted for your needs. Default setting is 15000 (15 sec).

André

Re: VM power off when cable red is crash HA

guson99 — Fri, 21 Jan 2011 18:39:22 GMT

Hi, thanks for response.
My 2 nics are in active mode in the vswitch.
The 2 nics are connected to the same switch Cisco 3750, but I not configured nothing with spanning-tree portfast
maybe this is a my problem.
Now, if I have another switch and I connect 1 nic connect to the cisco 3750 (1) and the another nic 2 connect to the cisco 3750 (2), I need spanning-tree portfast?
Do I have the same a problem?
Sorry for my unknowledge

Regards.

Re: VM power off when cable red is crash HA

a_p_ — Fri, 21 Jan 2011 19:04:46 GMT

You'll have to configure spanning-tree portfast on each switch port, no matter if it is on the same switch or another. Unless you set it, the spanning-tree protocol can take up to ~45 seconds to allow traffic on a port in case of an uplink failure. Since HA is triggered after 15 seconds (by default) you would always run into HA once an uplink fails.

André

Re: VM power off when cable red is crash HA

guson99 — Mon, 24 Jan 2011 13:58:30 GMT

Hi Andre, thank you for your recommendation.

Regards.