Rebooting last Switch of a Stack

[7rrivera7]

Yesterday i had an issue with switch #6 (last in the cascade) of an Avaya ERS4850 GTS PWR+ stack running firmware 5.6.2.1. Several users on this switch lost connectivity but others on the same switch were fine. While troubleshooting, I noticed the affected ports would maintain "LINK" even though the UTP cable was removed. Disabling and re-enabling the port did not resolve the issue so I requested a half hour window and re initiated switch #6. Unfortunately, the reboot affected switches 4 and 5 also which also rebooted.

AUR was configured and enabled. The system log and my SYSLOG server does not show the cause of the original failure or a possible reason for affecting switched 4 & 5.

Anyone experience this before? Switch #6 is at the end of the cascade and provided the "return" route but would this affect the other switches?

[MatzeKS]

Please try to figure out if there any software exception causes this behavior.

CLI:
show system last-exception unit all

good luck

[7rrivera7]

Thanks for the response Mat. Here is the output - can you assist me?

  Last Saved Exception - Unit# 1
--------------------------------------
No exception registered in the system.


  Last Saved Exception - Unit# 2
--------------------------------------
No exception registered in the system.


  Last Saved Exception - Unit# 3
--------------------------------------

bld version: 5.6.2.27 time: (09/Nov/12 13:15:44) view: (productio)
sysUpTime: 89 days, 23:42:01
Registers:

     R00      R01      R02      R03      R04      R05      R06      R07
00a5b294 06973be0 00000000 00000003 0625cff0 015e9624 025dc178 00000000
     R08      R09      R10      R11      R12      R13      R14      R15
00000000 00000004 00000001 00000004 00000001 00000000 00000000 00000000
     R16      R17      R18      R19      R20      R21      R22      R23
00000000 00000000 00000000 00000000 00000000 00000000 00000000 0257e4f8
     R24      R25      R26      R27      R28      R29      R30      R31
00000047 00000000 00000000 00000001 06973c6c 00000000 00000005 0625cff0

Exception type: Data Access
Task Name "tLLDP"
  KrnlSt 0, IntCnt 0, TskLckCnt 0, DAR 0x00000003, PC 0x00e58bc4, SP 0x06973d80
- Exception Stack Trace
  + PC 0x00a5aaa4
= Total 228 Bytes =


  Last Saved Exception - Unit# 4
--------------------------------------

bld version: 5.6.2.27 time: (09/Nov/12 13:15:44) view: (productio)
sysUpTime: 335 days, 11:16:12
Registers:

     R00      R01      R02      R03      R04      R05      R06      R07
00a5b294 06973be0 00000000 00000010 069258e8 015e9624 025dc178 00000000
     R08      R09      R10      R11      R12      R13      R14      R15
00000000 00000004 00000001 00000004 069258f0 00000000 00000000 00000000
     R16      R17      R18      R19      R20      R21      R22      R23
00000000 00000000 00000000 00000000 00000000 00000000 00000000 0257e4f8
     R24      R25      R26      R27      R28      R29      R30      R31
00000047 00000000 00000000 00000001 06973c6c 00000000 00000005 069258e8

Exception type: Data Access
Task Name "tLLDP"
  KrnlSt 0, IntCnt 0, TskLckCnt 0, DAR 0x00000010, PC 0x00e58bc4, SP 0x06973d80
- Exception Stack Trace
  + PC 0x00a5aaa4
= Total 228 Bytes =


  Last Saved Exception - Unit# 5
--------------------------------------

bld version: 5.6.2.27 time: (09/Nov/12 13:15:44) view: (productio)
sysUpTime: 335 days, 11:16:13
Registers:

     R00      R01      R02      R03      R04      R05      R06      R07
000aec28 050e5f60 00000000 0000ffff 00003032 00000001 00000001 00000000
     R08      R09      R10      R11      R12      R13      R14      R15
00000000 00000000 017cb404 0000061e 00000000 00000000 00000000 00000000
     R16      R17      R18      R19      R20      R21      R22      R23
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
     R24      R25      R26      R27      R28      R29      R30      R31
00000000 00000000 00000000 00000000 00000000 00000000 0000ffff ffffffff

Exception type: Data Access
Task Name "tRPC"
  KrnlSt 0, IntCnt 0, TskLckCnt 0, DAR 0x0000000f, PC 0x0001aea4, SP 0x050e7ea8
- Exception Stack Trace
  + PC 0x000aec48
  + PC 0x000aec28
  + PC 0x000aed58
  + PC 0x00dc8f50
= Total 200 Bytes =


  Last Saved Exception - Unit# 6
--------------------------------------
No exception registered in the system.

[MatzeKS]

Hi rrivera7,

as I expected you had a lot of software exceptions on your affected stack.
Your running software version is quite old (November 2012), therefore I'd recommend you to upgrade your stack to the latest available release v5.10. 
As far as I know you upgrade directly from v5.6.x to 5.10.x - save your current running-config (USB/TFTP) - upgrade the Diag (FW) first - reboot the stack - than upgrade the Image (SW).

Good luck

You'll find the related images here:
https://support.avaya.com/downloads/download-details.action?contentId=C20169201950471010_0&productId=P0610&releaseId=5.10.x

[Øyvind Nikolaisen]

You will actually have to have an intermediate step in order to upgrade to 5.10 - here's from the release notes:
To upgrade to the new software release 5.10 on ERS 4800, first verify or upgrade to software image
5.6.5 or 5.7.0, diagnostic image 5.8.0.01, or diagnostic image 5.8.0.03.

[7rrivera7]

Yes, I read the release notes and have already downloaded the intermediates. Thanks for the heads up. 

[subnet11]

Hi,

Was this ever resolved ? I am having almost the same issues.