VNXe 3200 Block-Level Replication Stalling/Freezing

Recently my company deployed dual VNXe 3200 series SANs for one of our clients. This client has a primary and a disaster recovery SAN. We currently utilize the built-in replication engine within the VNXe operating system. This is block-level replication technology that is used to replicate individual datastores across the client network to a remote site.

Currently, there are 4 datastores being replicated over to the remote site every hour. Just recently we discovered that 1 of the 4 datastores had stopped or became “hung/frozen.” All other datastores are replicating without issue. The problematic datastore has only 1 virtual machine stored in this location. EMC’s tier 1 support only response is to purge the destination datastore and reseed all of the data for the problematic datastore. Then reboot storage processors at source and destination sites. EMC blames this kind of problem on network related issues/outages. However, we have not be able to determine an outage lasting longer than 30 seconds.

My issue, is that if EMC is stating this is a network problem, then why haven't the other datastores had the same issue yet?

Anyone else run into this type of issue? This is what the replication session looks like currently. No change in the statistics since 9/11/2015.