Unable to connect Subscription URL from Subscribed Content Library of vCenter server | Error : "The remote library is not reachable"

Products

• VMware vCenter Server

Issue/Introduction

Symptoms:

Subscriber vCenter server is unable to connect to the Publisher URL.

It giving below Error while accessing Subscription URL: "The remote library is not reachable"

 

Environment

VMware vCenter Server 8.0.x
VMware vCenter Server 7.0.x

Cause

When Subscriber VCenter is unable to ping/connect to the Publisher VCenter OR if the Publisher VCenter is not reachable over HTTPS port 443 from Subscriber VCenter, will result into the Error: "The remote library is not reachable"

Resolution

• Test the connectivity between the Subscriber and Publisher vCenter server using Ping / curl. 
• Test the DNS name resolution on both Subscriber and Publisher vCenter
• Use the openssl command to test connectivity and also to confirm the current SSL information
  # openssl s_client -connect destination-ip:ssl-port

 

Based on the results, Engage internal network team to investigate the network communication issues between Publisher and Subscriber vCenter server.