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Tuesday, November 27, 2012

What are the steps to upgrade IOS for VSS 6509 switches?

We have 2 6509 switches configured with VSS. We would like to enable SSH but it is not available existing IOS which is "s72033-ipbase-mz.122-33.SXI3.bin". SSH available in "s72033-ipbasek9-mz.122-33.SXI10".

Please advise step by step procedure for upgrade the IOS with VSS configured switches.


Here are the steps to upgrade IOS for VSS 6509 
1.  Copy the IOS from the TFTP to the active blade supervisor card:  copy tftp:///IOS.bin sup-bootflash:
2.  Copy the IOS from the TFTP to the secondary blade supervisor card:  copy tftp:///IOS.bin slavesup-bootflash:
3.  Go to enable mode and change the bootstring/boot variable.
NOTE:  In this step, what we've done is specify that the chassis boot the NEW IOS and also specify that the chassis boot the old or existing IOS in case the first one fails.

conf t
NO boot system flash sup-bootdisk:OLD_IOS.bin
boot system flash sup-bootdisk:NEW_IOS.bin
boot system flash sup-bootdisk:OLD_IOS.bin
end
copy run start
reboot

Please click here for Cisco IOS In-Service Software Upgrade procedures from Cisco. 


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