I am currently having some serious problems with my exchange 2010 dag environment running on 5 exchange mailbox servers and 14 databases. 3 mailbox servers holding database copies and 2 mailbox server are being used for only heartbeat for now.
2 exchange mailbox server (ex01 and ex03) are on the 10.78.133.0 subnet. (10.78.133.143, 10.78.133.150)
1 Exchange mailbox server (ex02) is on the 10.65.65.0 subnet (10.65.65.100) (All 3 mailbox servers are on one site)
hw01 - mailbox server (seperate site)
nw01 - mailbox server (seperate site)
The cluster is on a node majority mode
dag ips 10.78.133.50
Earlier this morning, ex02 ip went offline with the following event log 1135 and 10.78.78.50 dag ip came online and 10.65.65.0 was offline. As a result all of the databases on 10.65.65.100 went in a failed state and 10.65.65.100 ip went unavailable and was giving errors like the network manager could not be intialized.
after sometime and a reboot ex02 came back online, but ex03 10.78.78.150 ip became unavailable and its database went into failed state. I am not sure about ex03, why did it go out and how can i bring the ip to an available state
Would need your help in the matter?