Upgrading IOS images for SSH support on 4506 with single Sup IV engine

[Rick Pancratz]

I have been asked to upgrade the IOS images on three 4506 switches with a single Supervisor IV engine in each to allow for SSH2 access.

The current image is cat4000-i5s-mz.122-25.EWA.bin

I have uploaded cat4000-i5k91s-mz.122-25.EWA14.bin to bootflash on each Supervisor engine.

The ROM on each SUP IV is 12.1(20r).  I don't want to have to upgrade the ROM version.

Will the cat4000-i5k91s-mz.122-25.EWA14.bin image retain all the current features of the current image and provide SSH2 support, without requiring a ROM upgrade?

Each switch has 512 Mb of RAM.

If this image will accomplish what I want, what are the commands used to select the new image from bootflash.  I'm familiar with image updates on fixed chassis switches using the boot system flash command.

Thanks,

Rick

[Edison Ortiz · Accepted solution]

You don't need to update the ROM while moving from your current code to the new code.

Updating the ROM is rarely needed and often it is highlighted in the release notes from the code you are about to install.

Since the release notes from your current code to the new code are the same, I suspect no changes.

ROM update is also needed when a newer hardware requires it, also rare.

The process for image update is the same. Copy the file from TFTP to a file system in the switch then change the boot system flash command while appending the exact location and filename.

[glen.grant]

  Personally I would go with something that's  newer .  That train is end of support.