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IdentiFi Wireless spontaneous reset "Cause: MU Session Manager Not Responding."

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TitleIdentiFi Wireless spontaneous reset "Cause: MU Session Manager Not Responding."
Symptoms
  • Spontaneous reset.
  • MU Session Manager Not Responding.
  • Component [MU Session Manager] is down. Component will be restarted.
01/16/16 09:13:30   Critical    Startup Manager                 Initiating Reboot.  Cause: MU Session Manager Not Responding.
01/16/16 09:13:30   Major       Startup Manager                 Component [MU Session Manager] is down. Component will be restarted.

 
Environment
  • IdentiFi Wireless
  • WS-V2110 Medium Platform
  • Software version 9.15
  • Software build 9.15.10.0004
  • AP26xx
  • AP36xx
  • AP37xx
  • AP38xx
  • AP4102
  • W786.
  • IBM Blade Center HS22
  • VMWare VSphere 5 Enterprise Plus
  • VMWare ESXi 5.5.0 (4 vCPU / 2 GB Memory / 27 GB HDD)
Cause
Cause: MU Session Manager Not Responding.
Manager Component [MU Session Manager] is down. Component will be restarted.
Resolution

Upgrade firmware to version 9.21.18, 10.31.06 or higher. 

If the issue should occur again, firmware release 9.21.x has core logic enabled by default in code and if the system spontaneously reset it will produce a core in the tech support download package.Please see also How to Collect a Tech Support File From a Wireless Controller, create a case or contact support for an immediate technical assistance. Please, make sure to give reference to this article when you open a case with the support team.

How To Create a Case Through Extreme Support Portal

 

Additional notes
Release Note: 
wns0018025 - Corrected out of range exception on the controller where creating a new topology would Assign a VLAN ID greater than 4096.
wns0018025 -  Resolved a corner case where creating a topology may have an invalid internal VLAN ID causing Controller instability.

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