troubleshooting Question

Exchange 2010 DAG died can't re-establish. Can I drop it, create new one using one network card (this is VM)?

Avatar of challBOE
challBOE asked on
NetworkingExchangeDNS* DAG
7 Comments1 Solution93 ViewsLast Modified:
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...
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 1 Answer and 7 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 7 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros