Exchange 2010, sp3 rollup 25 on server 2008 r2, EXI-vms.
Our DAG died an ugly death in the aftermath of another incident. There may have been the deletion of a second virtual network card, but I didn't do the initial setup of Exchangeor DAG, so dont know for sure.
Right now there is one card and one network address.
Oddly the active mailbox server seems to have the IP address of the DAG embedded in itself but it is not in the normal network card information under TCPIP/4. Its only visible when looking at ipconfig /all.
In any case, I am trying to re-establish the DAG, but can not.
I see in the event log that the account "ExchangeDAG$" has a login failure, but I dont think there ever was such an account/machine. There is a DNS entry for "ExchangeDAG" as required, but no actual active directory object for it.
I ran cluster verification to try and help understand what was going on - it warns that that the windows KB's dont match.
Should I break DAG, let users work on the existing server and then try to establish a new DAG?
Can I do this with one network card ? (PS, there is no MAPI network)
Is running cluster verification on 2010 EX/2008 r2 OS not a valid thing to do?
I have read a few articles but honestly I think I have a mental block on this.
I hope this doesnt end in a dreaded, $$, MS call...
which server gone down? active or passive?
if all mailbox databases went down?
1st of all try to bring online Mapi network
U can verify it from cluster console and ensure that it has correct IP assigned
Also check computer objects for DAG "ExchangeDAG"
Did you checked base cluster name and its ip if alive?