December 2006
Intermediate to advanced
1188 pages
72h 8m
English
Content preview from Cisco IOS Cookbook, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Loading a New IOS Image
Problem
You want to upgrade the IOS image that your router uses.
Solution
The copy tftp command allows you to use TFTP to download a new IOS version into the router’s flash memory:
Router1#copy tftp://Destination filename [c2600-ik9o3s-mz.122-12a.bin]?172.25.1.1/c2600-ik9o3s-mz.122-12a.bin flash:Accessing tftp://172.25.1.1/c2600-ik9o3s-mz.122-12a.bin... Erase flash: before copying? [confirm]<enter>Erasing the flash filesystem will remove all files! Continue? [confirm]<enter>Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erased Erase of flash: complete Loading c2600-ik9o3s-mz.122-12a.bin from 172.25.1.1 (via FastEthernet0/0.1): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! [OK - 11135588 bytes] Verifying checksum... OK (0xE643) 11135588 bytes copied in 82.236 secs (135410 bytes/sec) Router1#<enter>Proceed with reload? [confirm]reload<enter>
Discussion
Sooner or later you will need to upgrade your router’s IOS image. Common reasons for upgrading the IOS include new features, bug fixes, and security vulnerabilities. Before you attempt to upgrade your IOS, you should save a backup copy of your current IOS to your TFTP server, as discussed in Recipe 1.9.
You should ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.