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Redundant SUP IOS upgrade issue

Dear All,

               I have 6509-E chassis with redundant SUP.

show module output

5    2  Supervisor Engine 720 (Active)            WS-SUP720-3B     
6    2  Supervisor Engine 720 (Hot)                 WS-SUP720-3B      

We had s72033-adventerprisek9_wan-mz.122-33.SXH8b.bin IOS running on both SUPs. While upgrading to s72033-adventerprisek9-mz.151-2.SY2.bin, I followed this link.

After executing "hw-module module 6 reset" command for standby SUP, standby SUP reloaded but stopped responding after (Console message)

Cisco IOS Software, s72033_rp Software (s72033_rp-ADVENTERPRISEK9-M), Version 15.1(2)SY2, RELEASE SOFTWARE (fc3)
Technical Support:
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Wed 26-Feb-14 16:36 by prod_rel_team
Image text-base: 0x4010C158, data-base: 0x451DB140

from Primary SUP, output of show module was..

5    2  Supervisor Engine 720 (Active)         WS-SUP720-3B       
6    2  Supervisor Engine 720 (Other)          WS-SUP720-3B  

After quite a while primary SUP reloaded (without being standby SUP came online) and whole chassis reloaded.

This is not the expected behavior. Did anybody faced this problem before ?

Please share your thoughts.

Thanks & Regards

Ahmed Gadi


Everyone's tags (1)
Community Member

Hi Ahmed,Can you provide the

Hi Ahmed,

Can you provide the log from primary sup console after you reset slave sup? is there any crashinfo generated on slot5/6 sup?



Community Member

I do not have it in buffer, I

I do not have it in buffer, I will check our syslog server and will update.

VIP Super Bronze

Ahmad,At this stage, you may


At this stage, you may want to make sure you have the same exact IOS installed on both sups and reboot the entire chassis to bring the system back to normal with slot 5 as active and 6 as stand-by.  Also, is your config register set correctly for both sups  (0x2102)?


Community Member

Hi Reza,              Both

Hi Reza,

              Both installed IOS were same and newer IOS were same as well. 

Config register was 0x2102 as well.

This is what happened. Whole chassis got restarted, which is unexpected.

Please check attached text file before resetting standby SUP

VIP Super Bronze

Hi Ahmad,That is certainly

Hi Ahmad,

That is certainly not normal. I am thinking, you are encountering a bug in IOS 15, which in not uncommon specially since the devices were working fine before the upgrade.

Can you try loading a different version of IOS and test?


Community Member

Hi Reza/Vincent,             

Hi Reza/Vincent,

                              There is not much information on syslog server logs.

I have sea_console.dat files on supboot-disk: as well as slavesupboot-disk:.

How to copy sea_console.dat from slavesup-disk: to tftp ?

Will this Document resembles for sea_console.dat file ?


Community Member

sh version (Output taken

sh version (Output taken today)

CORE-2 uptime is 1 day, 4 hours, 8 minutes
Uptime for this control processor is 1 day, 4 hours, 8 minutes

System image file is "disk0:s72033-adventerprisek9-mz.151-2.SY2.bin"
Last reload reason: Unknown reason

Logs do not give much clear picture. check attached text file related to standby sup after active reloaded.

Community Member

Hi,can you check the last


can you check the last reboot reason of "show ver"? 

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