topic Snapmirror across different networks/subnet in ONTAP Discussions

Snapmirror across different networks/subnet

ov12 — Wed, 04 Jun 2025 21:36:47 GMT

I have two clusters, both running ontap 8.3.1.

They're on two different networks on two different subnets, the remote cluster being the one that doesn't have intercluster lifs set up (and won't be either)

Is there a way to set up cluster peering in order to snapmirror, other than having ic lifs set up? Maybe something to do with routing?

Thanks

Re: Snapmirror across different networks/subnet

SeanHatfield — Wed, 30 Mar 2016 22:23:56 GMT

No intercluster lifs, no snapmirror. The two clusters have to be able to communicate, and the snapmirror traffic runs over the intercluster lifs. They can be routed. Layer2 adjacency is not required.

Re: Snapmirror across different networks/subnet

ov12 — Thu, 31 Mar 2016 13:34:09 GMT

I was told it could be routed over the data interfaces (for this example, cifs). I'm able to ping each cluster as well.

Re: Snapmirror across different networks/subnet

JamesIlderton — Thu, 31 Mar 2016 17:06:58 GMT

You can only route replication traffic over data interfaces using 7-mode; cDOT does require you to use Intercluster LIFs. You can create these on the same physical ports, if you don't have a spearate replication or management network you prefer to use. You'll have to make sure you have these LIFs on all nodes of the clusters, even if they don't currently house data you are replicating - to account for both Storage Failover and Volume/LUN Move events.

Re: Snapmirror across different networks/subnet

ov12 — Tue, 19 Apr 2016 19:30:34 GMT

Thank you so much for clearing that up!