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Adtran 1638P rebooting

Per our customer the switch stack has rebooted three times in the past month.  The customer does operate in the GUI but advised that they were not logged in when the problem occurs.  I notice that the switch shows POWER-ON-RESET after the reboot.  Any thoughts?

1638P#sh ver

ADTRAN, Inc. OS version R11.2.0

  Mainline Version: ENM.14.50

  P4 Changelist: 144527

  Checksum: 7d11fe74c2aab8b04becde52fc582462

  Built on: Tue Jun  3 16:35:36 CDT 2014

  Upgrade key: c03ca9f9a2cc30165d23ec7a38a08240

Boot ROM version R10.3.0.SB

  Checksum: f569288f233ccb7a37bb2ccf4862855f

  Built on: Tue Aug  7 11:17:49 CDT 2012

Copyright (c) 1999-2014, ADTRAN, Inc.

Platform: NetVanta 1638P, part number 1700569F1

Serial number LBADTN1330AA498

Flash: 134217728 bytes  DRAM: 268435456 bytes

638P uptime is 2 days, 19 hours, 38 minutes, 14 seconds

System returned to ROM by Power-On Reset

Current system image file is ""

Primary boot system image file is ""

Backup boot system image file is ""

Primary system configuration file is "startup-config"


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Re: Adtran 1638P rebooting

Hi spc_fisherja:

I too am interested in the 'System returned to ROM' status.  I'm familiar with Warm Start when issuing the reload command, and Hard Reset after loss of power.  Not sure about Power-On Reset.

It is generally recommended to run the latest software release from the Extended Maintenance Branch; R11.4.3 as of this post.  I believe several important fixes have been provided and it's always a good place to start.