NSX Edge node deployment remains in Pending status due to IP Pool exhaustion

Products

• VMware NSX

Issue/Introduction

• A newly deployed NSX Edge node remains in a configuration pending status.
• Controller connectivity from the Edge node shows as down with an OTHER_ERROR state.

 

• The /var/log/syslog on the Edge node displays connection closure events: 

2025-07-## NSX 2### - [nsx@6### comp="nsx-edge" subcomp="nsx-proxy" s2comp="nsx-net" tid="3##" level="WARNING"] StreamConnection[46864 Connected to ssl://#.#.#.#:1235 sid:46864] ReadCallback - closing connection (error: 167773206-sslv3 alert certificate unknown (SSL routines), socket: open)   <<<<<<
2025-07-## NSX 2### - [nsx@6### comp="nsx-edge" subcomp="nsx-proxy" s2comp="nsx-net" tid="3##" level="INFO"] StreamConnection[46864 Closing to ssl://#.#.#.#:1235 sid:46864] Closing (reason: network error)
2025-07-## NSX 2### - [nsx@6### comp="nsx-edge" subcomp="nsx-proxy" s2comp="nsx-net" tid="3##" level="INFO"] StreamConnection[46864 Closed to ssl://#.#.#.#:1235 sid:-1] Closed (reason: network error, error: 167773206-sslv3 alert certificate unknown (SSL routines)) <<<<
2025-07-## NSX 2### - [nsx@6### comp="nsx-edge" subcomp="nsx-proxy" s2comp="nsx-rpc" tid="3##" level="WARNING"] RpcConnection[46864 Negotiating to ssl://#.#.#.#:1235 0] ReadCallback - closing connection (error: 167773206-sslv3 alert certificate unknown (SSL routines))  <<<<

 

• The /var/log/proton/nsxapi.log on the NSX Manager displays IPAM allocation failure: 

2025-0#-## ERROR L2HostConfigTaskExecutor4 IPAMServiceImpl 5140 POOL-#### [nsx@6876 comp="nsx-manager" errorCode="MP5109" level="ERROR" subcomp="manager"] Insufficient Resource Exception : no free IP found to allocate from the pool IpPool/####-####-####-####.
2025-0#-## ERROR L2HostConfigTaskExecutor4 IPAMUtils 5140 FABRIC [ns#@6876 comp="ns#-manager" errorCode="MP8212" level="ERROR" subcomp="manager"] Failed to get a valid IP from IpPool IpPool/####-####-####-#### with cidr null, {}.

Environment

VMware NSX

Cause

The NSX Edge node fails to initialize successfully due to IP address exhaustion within the assigned IP Pool (e.g., TEP IP Pool).

Resolution

This is a condition that may occur in a VMware NSX environment.

 

To resolve this issue, expand the capacity of the exhausted IP Pool.

1. Log in to the NSX Manager UI.

2. Navigate to System > Fabric > Settings > IP Pools (or Profiles > IP Pools depending on exact topology configuration).

3. Identify the specific IP Pool referenced in the Insufficient Resource Exception logs.

4. Edit the IP Pool to increase the IP range or add a new valid subnet.

5. Verify the Edge node configuration status successfully transitions from Pending to Success.