Catalyst 2600 upgrade - reset?

Discussion in 'Other Cisco Equipment' started by no_logo_f_kansas, Dec 9, 2006.

  1. no_logo_f_kansas

    no_logo_f_kansas LI Guru Member

    another quick question for you cisco guys...

    to apply a firmware upgrade to a catalyst you're required to reset the router, but according to cisco's site, there's two different sorts of resets:

    1) reset ROM monitor and 2) reset - switch.

    If I understand this right, reset ROM monitor with simply quickly reload the IOS, while reset - switch will reset the entire system.

    i'm curious what's needed here, if it's a quick restart, that would work, but this is a crucial switch and can't be down for more than a second or two.
  2. ifican

    ifican Network Guru Member

    First off its going to take a couple "minutes" to reload the device. If its a real basic config with not much going on could be down to about 60 seconds but its definetely going to feel alot longer then that. Do this after hours if you dont want to worry about downtime.

    If you are updating IOS and its the only IOS on the device then it will boot with the new image (will give you a pointer error but its harmless and unless you are watching via the console you wont even see it). However if you are keeping the old image and adding a new one, you will need to change the boot statement to reflect which IOS you want the router to boot too. By default its going to boot to the old or only image depending on what is loaded.
  3. no_logo_f_kansas

    no_logo_f_kansas LI Guru Member

    i can do cisco configs but upgrading and reinstalling ios:n... ughh... basic ccna knowledge but thats it.

    do i actually need to completely reinstall the ios for an upgrade, because browsing ciscos web site, it seemed that i should be able simply to apply some patches via CiscoWorks. but after talking to a friend of mine with a limited knowledge of cisco, he thought the entire image has to replaced.

    essentially, im asking how upgrades work on any ios.
  4. ifican

    ifican Network Guru Member

    Yes - the patch or upgrade is just that an IOS / patch update. It will be the old code with whatever changes were necessary to fix or add features. Router and switch updates work like reinstalling your OS, not like OS patch management. Usually switch code is only a couple megs so it fast, but in order to get the features of the update you have to reboot to the new image, that is what takes the most time. Generally you dont need to make any changes to your config, though at times and its a good habit, you need to point the boot loader at the image you want it to boot.
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