BGP Connection Not Connecting on NSX-T edge node due to TCP: MD5 Hash failed

Products

• VMware NSX

Issue/Introduction

A known issue with the MD5 checksum and BGP

Symptoms:
BGP connection not established with the peer

To find more, go to the root directory of /var/log/

cd /var/log/

To search for this specific error, run the following

grep 'TCP: MD5 Hash' syslog

You will find something similar to

2023-05-23T20:37:39.064Z edgenode.localhost kernel - - - [10027703.550290] TCP: MD5 Hash failed for (source-bgp-ip, 46784)->(destination-bgp-ip, 179)

when facing this issue

Environment

VMware NSX-T Data Center

Cause

$ is not a supported character for BGP password and will cause MD5 checksum error

Resolution

known issue - do workaround

Workaround:
remove $ from the password and the connection will establish if this is the only issue

Additional Information

Impact/Risks:
unable to establish BGP connection when $ is in the password of the BGP connection