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upgrading 6509 in VSS mode

Hi guys,

we have two 6509 running in VSS mode and we encountered the bug described here

so basically we can't ssh into the chassis.

So we're planing on upgrading the chassis to fix it, which I couldn't practice in lab...

The current image is "sup-bootdisk:s72033-ipservicesk9_wan-mz.122-33.SXI3.bin" and we wou'd like to upgrade to s72033-ipservicesk9_wan-mz.122-33.SXI8.

I read the guidelines for upgrading here

but I noticed something I'm not familiar with :

eFSU Upgrade on an Installed Modular Image Example

This example shows how to perform an an eFSU upgrade on an installed modular image:

Router# copy sup-bootdisk:s72033-advipservicesk9_wan-vz.122-33.SXI2.bin

Router# copy slavesup-bootdisk:s72033-advipservicesk9_wan-vz.122-33.SXI2.bin

Router# install file sup-bootdisk:s72033-advipservicesk9_wan-vz.122-33.SXI2.bin sup-bootdisk:/newsys

Router# install file slavesup-bootdisk:s72033-advipservicesk9_wan-vz.122-33.SXI2.bin slavesup-bootdisk:/newsys

The thing is, the install command is not available on my switch :


% Unrecognized command

So I guess I'm not running a modular IOS.

I read a bunch of things about monolithic and modular IOS but I'm kinda lost here...

Could you tell me how can I tell the difference between a modular and a monolithic image?

And in my case, what should I do after copying the image on the sup-bootdisks?

Is there any other impact on the upgrade process?

Thank you for your answers!!