Upgrading IOS on VSS Switch (

[arkar bo bo]

Hi All,

I would like to upgrade IOS on 6509-E VSS switch. My SUP engine is Catalyst 6500 Series Supervisor Engine 2T. 

Current OS : s2t54-advipservicesk9-mz.SPA.150-1.SY3.bin

To Upgrade OS : s2t54-advipservicesk9-mz.SPA.150-1.SY7a.bin

Procedure is as below.

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1.  Copy the IOS to primary supervisor card using the command "copy tftp:/IOS.bin bootdisk:"

2.  Copy the IOS to the SECONDARY supervisor card using the command "copy tftp:/IOS.bin slave-bootdisk:"

3.  Remove the old boot variable string using the command "NO boot system flash bootdisk:OLD_IOS.bin"

4.  Add the new IOS file to the boot variable string using the command "boot system flash bootdisk:NEW_IOS.bin"

5.  Config register is already 0X2102 so no need to change it. Reload after this.

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Its there any other thing we may need to check because we do have lots of line card and incase it is not supporting new IOS . Also need advice if  any other step missing in upgrading procedure.

With Thanks.

[Leo Laohoo · Accepted solution]

Your procedure is what I always use.  

You can optionally check the MD5 hash value of the IOS file you've downloaded from the Cisco website against the MD5 hash value found in the Cisco website.