This document is locked

Use HTTP/FTP to upgrade IOS

Document

Sep 25, 2009 8:04 AM
Sep 25th, 2009

There are many obvious reason to use FTP to upload an image, but the one I'm  going to cover is transferring an IOS image across the internet using HTTP. This  tutorial will work for FTP as well.

IOS_http.png

Referring to the image above, we want to upgrade the IOS on RTR-A. We will be  accessing the IOS image that is on the web server with the address of  69.aaa.bbb.ccc. The command we use is

copy  http://69.aaa.bbb.ccc/c3825-advsecurityk9-mz.124-25a.bin flash:

Now is where the fun starts! The first thing you may need to do is disable  passive FTP on RTR-A. The default is to use passive FTP.

no ip ftp passive

Next run the copy command from above.

RTR-A#copy  http://69.aaa.bbb.ccc/c3825-advsecurityk9-mz.124-25a.bin flash:
Destination filename [c3825-advsecurityk9-mz.124-25a.bin]?
%Error opening http://69.aaa.bbb.ccc/c3825-advsecurityk9-mz.124-25a.bin (I/O  error)

Well that's no good. What's going on? Checking the ACL applied to the public  interface, we some denied traffic.

057557: Jul 1 12:43:37 CST: %SEC-6-IPACCESSLOGP: list 102  denied tcp 69.aaa.bbb.ccc(80) -> 75.ggg.hhh.iii(20651), 1 packet

Ahh, we need to create an ACE to allow the traffic. But take a look at the  destination address. In this case it's 75.ggg.hhh.iii which is the PAT address for  internal clients, not the interface IP of 75.xxx.yyy.zzz! Add the ACE to the ACL.

permit tcp host  69.aaa.bbb.ccc host 75.ggg.hhh.iii eq 80

Try the copy again.

RTR-A#copy  http://69.aaa.bbb.ccc/c3825-advsecurityk9-mz.124-25a.bin flash:
Destination filename [c3825-advsecurityk9-mz.124-25a.bin]?
Loading http://69.aaa.bbb.ccc/c3825-advsecurityk9-mz.124-25a.bin  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
23372352 bytes copied in 344.504 secs (67843 bytes/sec)

Now it's working! Don't forget to verify the image. Directions for that can be found at https://supportforums.cisco.com/docs/DOC-6083.

Average Rating: 4 (3 ratings)

Actions

Login or Register to take actions

This Document

Posted September 25, 2009 at 8:04 AM
Stats:
Comments:0 Avg. Rating:4
Views:15132 Contributors:0
Shares:0
Tags: ios, upgrade, ftp, http
+

Related Content

Documents Leaderboard

Rank Username Points
1 106
2 20
3 9
4 5
Rank Username Points
15
5