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Tunnel fails to connect with message: CTRL send message failed / failed to get ID

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Article ID: 211366

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Updated On:

Products

DX Unified Infrastructure Management (Nimsoft / UIM)

Issue/Introduction

A newly installed tunnel client is not connecting to the tunnel server.  Other clients connect fine; this client fails to connect and the following message is seen in the hub.log:

 

Feb 18 11:10:32:570 [140353004885760] 1 hub: SSL using cipher: DHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=DH       Au=RSA  Enc=AESGCM(256) Mac=AEAD
Feb 18 11:10:37:582 [140353004885760] 0 hub: CTRL send message failed for get id command
Feb 18 11:10:37:582 [140353004885760] 0 hub: CTRL failed to get ID from 111.11.11.111/48003

Environment

Release : 20.3

Component : UIM - HUB

Resolution

Check the default MTU Settings on the Ethernet interface of the tunnel client.

If it is not set to the normal default value of 1500 it may cause this issue.  

Example:

before:

 

[[email protected]]  ifconfig

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 8900

change:

[[email protected]]# ifconfig eth0 mtu 1500

 

after:


[[email protected]]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500