NSX-T Global Manager error "Location X is not reachable, Networking entities needs to be reviewed"

Products

• VMware NSX Networking

Issue/Introduction

Symptoms:

• NSX-T Data Center 3.x with NSX Federation
• On the Global Manager under Configuration -> Location Manager, a red banner is displayed "Location X is not reachable, Networking entities needs to be reviewed"
• On the Local Manager under Configuration -> Location, the Global Manager connection is displayed as green and Active.
• The environment is functioning as normal with no known issues.

Environment

VMware NSX-T Data Center 3.x
VMware NSX-T Data Center

Cause

This UI error is a false positive. The incorrect status occurs due to a mismatch between the persisted and in-memory connection values.

Resolution

This is a known issue impacting NSX-T Data Center, there is currently no resolution.

Workaround:
To workaround this issue and clear the error banner, a restart of the Async Replicator service on the Global Manager is required. The restart must be perform on the Global Manager which is the leader of the AR service.

• To identify the AR Leader, on any Global Manager as admin user

#get cluster status verbose

Group Type: ASYNC_REPLICATOR
Group Status: STABLE

Members:
UUID FQDN IP STATUS
917e0142-9865-9c16-0c0f-abb376388456 global1 10.185.17.102 UP
1a040142-4080-f6fc-18ed-8a7f10245748 global2 10.182.19.101 UP
e4f40842-e755-19ca-6d89-c8f34f125c11 global3 10.184.61.58 UP

Leaders:
SERVICE LEADER LEASE VERSION
site-manager 917e0142-9865-9c16-0c0f-abb376388456 740
ar 917e0142-9865-9c16-0c0f-abb376388456 737   <<<< AR Leader UUID

 

• ssh as admin user to the Global Manager identified above

Restart the AR service : 

#service async-replicator-service restart

Alternatively a reboot of the GM appliance can be performed.