Comments on: Howto upgrade IOS on a 3750 switch stack

By: Manmeet

Manmeet — Thu, 29 Jan 2009 15:32:38 +0000

hi julie,

Please use the .tar file for a stack…it will be more easy to make a stack without headache to think about the MAC addresses for switches.

Try this command in privileged mode:

archive download-sw /imageonly tftp:///.tar

and give a cold restart.

It will automatically delete the old IOSs from all the switches and restart with new IOSs only.
Master selection process will also automatically after setting the priority before giving the cold restart and may take sometime around 15 minutes to get all switches back to up state…So be cool and wait for the prompt…

Ask for more help…

By: Steve

Steve — Tue, 20 Jan 2009 10:40:15 +0000

Before reloading the master, you need to go into config mode and issue the command:

boot system switch all flash:/c3750-ipbasek9-mz.122-46.SE.bin

(or whatever IOS you have loaded on each switch. They should all be the same).

Before you reload, verify the contents of the switches’ flash and that the IOS are all the same, with: dir all

AND, check each switches’ boot config with: sho boot

For example they should all read:
BOOT path-list : flash:/c3750-ipbasek9-mz.122-46.SE.bin

HTH

By: Julie

Julie — Wed, 17 Dec 2008 12:13:50 +0000

I have a question regarding this topic. ‘howto update IOS on a 3750 switch stack’. I have copied the IOS to the master and member switches. boot flash is using new IOS, but when the reload command was issued only the master was upgraded.
Following the reload with the new IOS on the master, the member switches were not recognized. Disconnected the members and chg’d boot flash on each manually.
How can this be done automatically?