C6880-X Assymetrical memory configuration

[eekman]

When doing a ISSU upgrade of a 6880 VSS cluster I got the following log message:

Asymmetrical redundant configuration: Active SP has (2097151/262144K) memory, Standby has (2097151/409600K).

This seemed a bit strange since we bought the two chassis at the same time. I can't find a way to verify that the SP memory differs on the two units.

show platform hardware capacity

does not give me any information that supports a different memory configuration on the two units.

How can I verify the amount of SP memory on the two units?

[Mark Malone]

To see the 2nd unit you can try below that's 6509 vss may work for 6800 too

remote command standby-sp show ver

remote command standby-sp show mem

[eekman]

Thanks for your reply. I have tried that, but I don't trust the output:

switch1#remote command standby-sp show version
Cisco IOS Software, c6880x Software (c6880x-IPSERVICESK9-M), Version 15.1(2)SY4, RELEASE SOFTWARE (fc5)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Wed 05-Nov-14 16:37 by prod_rel_team

ROM: System Bootstrap, Version 15.1(02)SY01 [ Rel 1.1], RELEASE SOFTWARE

BOOTLDR: 
Switch1 uptime is 1 year, 19 weeks, 1 day, 21 hours, 30 minutes
...
<output omitted>
...
Cisco C6880-X-LE ( Intel(R) Core(TM) i3- CPU @ 2.00GHz ) processor (revision ) with 1833984K/262144K bytes of memory.

It says uptime is over a year, and it can't be since I rebooted the standby switch a week ago. The active switch was never rebooted (ISSU upgrade was aborted since a line card did not power on in the secondary switch).

[Mark Malone]

You may need to reboot both of the switches to clear the alarm if nothing has physically changed and it was working fine before , something may have happened when only 1 was rebooted and it came up and didn't sync correctly

https://supportforums.cisco.com/document/19981/pfredun-sp-4-physmemmismatch-asymmetrical-redundant-configuration-error-message

does the show redundancy and the show switch virtual role detail look ok ?

[Mark Malone]

Just checked both my vss switches as I had power outage around week ago unplanned

I see similar type of time issue , outage was 1 week ago yet remote switch is telling me its up 2 weeks but its control process or is same time as outage

same whether I check the standby-rp or sp

 (SWA)uptime is 1 week, 3 days, 12 hours, 45 minutes
Uptime for this control processor is 1 week, 3 days, 12 hours, 46 minutes

 (SWA-REMOTE) uptime is 2 weeks, 5 days, 1 hour, 47 minutes
Uptime for this control processor is 1 week, 3 days, 12 hours, 44 minutes

[eekman]

Yes, the standby looks OK, it's in hot standby and SSO looks ok. During ISSU upgrade I had a few issues, even after abortversion. I had to physically power off the switch and power it back on again to get a line card to power up. But after that everything looks good.

Even if the uptime is lying the amount of memory does not match that of the error message. I get the feeling it's only showing me info from the active switch.

[Rolf Fischer]

We were facing a similar slightly different problem and I found this discussion while doing an internet search.

%PFREDUN-SW2-4-PHYSMEM_MISMATCH: Asymmetrical redundant configuration: Active SP has (2097151/409600K) memory, Standby has (4194303/409600K).

I know this is an old discussion but our findings may help others:

The first 6880's were shipped with 2 GB onboard memory, but beginning from March 2016 they are shipped with 4 GB (link: datasheet, see table 2 "Onboard memory"). This can lead into hardware mismatch problems when replacing an existing VSS memberswitch (e.g. RMA). A memory upgrade kit (C6880-X-LE-MEMKIT=) is available for such cases. If you don't have the upgrade kit, you could also downgrade the new switch to 2 GB in order to avoid the mismatch.

Link: Cisco Catalyst 6880-X-LE Memory Upgrade

BR,

Rolf