Issue Description:
There is dbreplication issue between CUCM Pub and Sub. CUCM version is 9.1.
Investigation:
Output of "utils dbreplication runtimestate" shows (3) PUB Setup Completed and (?)Setup Completed. Publisher is connected and Subscriber is Off-Line.
On publisher - Show Network cluster shows Subscriber is not authenticated
On subscriber - Show Network cluster shows Publisher is not authenticated
ICMP reachability to IPs and hostnames are there between the servers.
Traffic for port 1500 shows (SYN_SENT) on both nodes, not Established, but the network team says there is no firewall.
utils firewall ipv4 status shows firewall enabled
Unified CM database status on Unified Reporting says
"connection to RTMT on subscriber could not be established"
and "Could not send/receive UDP packets for Subscriber"
RTMT is showing Subscriber server down. But both of the servers are up and expected services are running.
Changes made since the issue started:
DNS server IP has been changed to valid ones.
Have run "utils dbreplication forcedatasyncsub" and "utils dbreplication repair"
Can someone please suggest a solution or workaround or things which I need to check that can help me to fix this issue ?
