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Title
Exchange Servers disconnect from an Exchange DAG while running a replication. -
Description
Exchange Servers disconnect from an Exchange DAG (Database Availability Group) while running a replication.
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Cause
When taking a Quiesced snapshot there may be a split second disconnect from the network. This causes the Exchange server to disconnect from the DAG.
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Resolution
Put the following in a .bat file and run once on the exchange server in the cluster
###.bat file to change the cluster settings###
@Echo Off
REM #####################################################################
REM RUN THIS ON THE EXCHANGE DAG SERVER YOU WANT TO BACKUP
REM ####################################################################REM ##############################################################
REM Configures the Heartbeat settings for a cluster
REM ##############################################################
cluster.exe /prop SameSubnetDelay=2000:DWORD
cluster.exe /prop CrossSubnetDelay=4000:DWORD
cluster.exe /prop CrossSubnetThreshold=10:DWORD
cluster.exe /prop SameSubnetThreshold=10:DWORD -
Additional Information
THIS WILL AFFECT CLUSTER FAILOVER TIME
Effectively what this does is increases the timeout value for your Cluster Failover.
This is a possible workaround but may not work in every environment.This is the Microsoft document where the information is sourced from:
http://technet.microsoft.com/en-us/library/dd197562(v=ws.10).aspx