In a non-linked vCenter Server configuration, logging into the Site Recovery Plugin shows the vSphere Replication server status as "Not accessible"
vSphere Replication 8.x
vSphere Replication 9.x
vCenter Server 8.x
vCenter Server 9.x
The local VLSR/SRM appliance needs to check the health status of the local vSphere Replication appliance via port 5480
Validate connectivity between VLSR/SRM appliance and vSphere Replication appliance on port 5480.
1. Using nc
SSH to VLSR/SRM appliance.
nc -z [vSphere Replication Appliance] 5480
2. Using curl command can also be used to validate the endpoint destination.
SSH to VLSR/SRM appliance.
curl -k -v https://FQDN-of-vSphere-Replication-appliance:5480/configureserver/health/hms?ui=1
If there is no connection then the firewall will need to be open to allow the communication across that port.
SRM drplugin.log shows similar entries
2025-10-07 17:03:01,136 [srm-reactive-thread-2330] WARN com.vmware.dr.plugin.handlers.dashboard.VrHealthStatusHandler #-#-#-#-# - DrRequestHandlerError:
java.lang.Exception: Unable to get VR health status at URL: https://FQDN-of-vsphere-replication-appliance:5480/configureserver/health/hms?ui=1.
at com.vmware.dr.plugin.handlers.dashboard.VrHealthStatusHandler$RequestCallback.fail(VrHealthStatusHandler.java:180)
at com.vmware.dr.plugin.handlers.dashboard.VrHealthStatusHandler$RequestCallback.failed(VrHealthStatusHandler.java:158)
at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:137)
at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.executionFailed(DefaultClientExchangeHandlerImpl.java:101)
at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.failed(AbstractClientExchangeHandler.java:432)
at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.connectionRequestFailed(AbstractClientExchangeHandler.java:352)
at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.access$100(AbstractClientExchangeHandler.java:64)
at org.apache.http.impl.nio.client.AbstractClientExchangeHandler$1.failed(AbstractClientExchangeHandler.java:396)
at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:137)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$1.failed(PoolingNHttpClientConnectionManager.java:318)
at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:137)
at org.apache.http.nio.pool.RouteSpecificPool.timeout(RouteSpecificPool.java:169)
at org.apache.http.nio.pool.AbstractNIOConnPool.requestTimeout(AbstractNIOConnPool.java:632)
at org.apache.http.nio.pool.AbstractNIOConnPool$InternalSessionRequestCallback.timeout(AbstractNIOConnPool.java:898)
at org.apache.http.impl.nio.reactor.SessionRequestImpl.timeout(SessionRequestImpl.java:198)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processTimeouts(DefaultConnectingIOReactor.java:213)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:158)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:351)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.execute(PoolingNHttpClientConnectionManager.java:221)
at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(CloseableHttpAsyncClientBase.java:64)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.net.ConnectException: Timeout connecting to [FQDN-of-vsphere-replication-appliance/#.#.#.#:5480]
... 10 more
For the same kind of problem with linked mode vCenters see https://knowledge.broadcom.com/external/article/400280/site-recovery-plugin-ui-shows-vsphere-re.html