Site pairing is failing on SRM instances with error "Unable to connect to Site Recovery Manager Server"

Products

• VMware vCenter Server
• VMware Site Recovery Manager 8.x

Issue/Introduction

Symptoms:

• SRM UI display the below errors while creating a site pair or when trying to reconnect the site pair which is disconnected after vcenter server upgrade:

Unable to connect to Site Recovery Manager Server at https://srm-xxxxxxxxxxxxxxx.xxx:443/drserver/vcdr/vmomi/sdk.

Reason:java.net.UnknownHostException: srm-xxxxxxx-01.cxxx.xxxxx.xx.xxOperation



Unable to connect to Site Recovery Manager Server at https://srm-xxxxxxxxxxxxxxx.xxx:443/drserver/vcdr/vmomi/sdk.

Reason:java.net.SocketTimeoutException: 30,000 milliseconds timeout on connection http-outgoing-33 [ACTIVE]




• SRM Server at DR site is unreachable.

Environment

VMware vCenter Server 8.x
Site Recovery Manager 8.x
VMware Live Site Recovery 9.x

Cause

• It is observed when the vCenter version is not compatible with the Site Recovery Manager version

• For instance, the vcenter server version is 8.0u3c and the SRM version is 8.8, these warnings are expected when we try to reconnect the site pair

• Refer below interoperability and compatibility guide as below.

Resolution

Upgrade and match vCenter version, SRM and vSphere replication versions as per the compatibility and interoperability to resolve the issue.

Ref: Interoperability matrix link