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Exchange Server DAG heartbeat modification safe and what's the best practice for it?

New Contributor

Hi Experts,

 

I just want to confirm, Is it safe to modify Exchange Server DAG heartbeat and what is the best practice for this? I did a research and found some stuff but I did not see a Microsoft Docs supporting the claims.

 

Thanks in advance!

1 Reply
Best Response confirmed by vine0 (New Contributor)
Solution
The DAG replication rate depends on the replication traffic.

By default, heartbeat frequency (subnet delay) is 1000ms for both local and remote subnets and when a node misses 5 heartbeats (subnet threshold) another nod within your DAG cluster will initiate a failover.

A related thread for your reference.

DAG Replication Bandwidth
http://social.technet.microsoft.com/Forums/en-US/f23ebc4a-f237-4d5d-922c-7549ae54d2e1/dag-replicatio...

More information:

Planning for High Availability and Site Resilience
http://technet.microsoft.com/en-us/library/dd638104(v=exchg.150).aspx#NR

Configure Heartbeat and DNS Settings in a Multi-Site Failover Cluster
http://technet.microsoft.com/en-us/library/dd197562(WS.10).aspx