Robot communication Issue with RHEL 7.2

Document ID : KB000077080
Last Modified Date : 11/04/2018
Show Technical Document Details
Issue:
Client had a RHEL 7.2 and SUSE 12 SP2 connected to a secondary hub
that was using a tunnel to connect back to the primary.
From the primary trying to open up IM or AC2 to the robots you would get a communication error.

 
Environment:
UIM 8.51
Robot 7.93
RHEL 7.2
SUSE 12 SP2
Cause:
Client Linux admin had enabled:
tcp_tw_recycle
and
tcp_tw_reuse

by setting these values to 1 in the OS configuration for IPV4 TCP files
Resolution:
When the client changed these system setting back to 0 from 1
and restarted the machine the communication to the robots would then work.
 
Additional Information: