Host Disconnects at Random

This started yesterday at our "other site" (two sites total) that has 7 hosts and around 40 vm's. My solarwinds alarms started going CRAZY! Although it was not effecting business because they would disconnect for a few seconds then come back.

I went ahead and increased the vcenter heartbeat timeout and still had the same issues. Net Engineer noticed some packet blocks in the firewall (UDP traffic aka heartbeats) and he can't figure out why its blocking it. We had some other issues going on and I rebooted the domain controller at this other location and since then, no disconnects. Still can't pin point why/how this happened.

Wondering if it would be wise to go with a linked mode configuration so the heartbeats wouldn't have to travel over the link. Anyone have a similar experience?

(Our main location that hosts vcenter did not experience any disconnects, net engineer said network wasn't congested)

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Comments

Essendon

What do the logs on the DC say? Standard edition of vCenter minimum for linked mode.

jibbajabba

Assuming you got a vCenter in either site, are the two sites in the same logical network and are they able to see each other ?

If so, do both vCenter have a different ID ? If not then you will have duplicate Mac addresses which may cause the firewall to block hosts.

tstrip007

Essendon wrote: »

What do the logs on the DC say?

We were getting NETLOGON failed to authenticate system messages and ActiveDirectory_DomainService - This directory server has not recently received replication information from a number of directory servers....