Cluster Replication

I hope somebody could guide me on this regarding cluster replication issues.

Legend:

SiteA - Domino1 & Domino2

SiteB - Domino3 & Domino4

We have two clustered sites (SiteA & SiteB) environment. Two members (Domino) on each clustered site. Main Domino in SiteA is the SMTP server (Domino1), and the main Domino in SiteB is the NRPC server (Domino3). The second server’s (Domino2 & Domino4) in SiteA & SiteB acts as a failover domino to the mains.

We did a successful upgrade from 6.5.4 to 7.0.2 few weeks ago. Before the upgrade, cluster replication (on the failover server) was working perfectly, mail documents replicated at once. We noticed after the upgrade that the second Domino (Failover server on the SiteA - Domino2) not functioning 100% as we expected. Although I am also monitoring the failover server in SiteB if it is functioning 100%.

Mails on the Domino1 has the same replica id’s on the failover server (Domino2) and all nsf’s are listed in the cluster directory, but the count and number of documents/mails are not sycn, so it seems replication not to be working at all. I have Been troubleshooting it but cannot find the solution or what might caused the issue.

TIA