I recommissioned a Cisco 4503 switch today with a SUP II+TS and whenever I get the chance to wipe a switch or device and start fresh I like to upgrade the IOS and ROMMON if applicable. This procedure was slightly different from a Router ROMMON upgrade:
! Copy the ROMMON image to the bootflash:
Switch#copy ftp://192.168.1.1/cat4500-ios-promupgrade-122_31r_SGA4 bootflash:cat4500-ios-promupgrade-122_31r_SGA4
! Once copied, reload the switch
Switch#reload
! Press Crtl-C to enter ROMMON during bootup and run the following command
rommon 1 > boot bootflash:cat4500-ios-promupgrade-122_31r_SGA4
After the ROMMON upgrade has completed, the switch wil reload automatically and boot into IOS. You can perform a show version to verify that the ROMMON has been upgraded.
More detailed instruction can be found in the Release Notes of the ROMMON image.
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