Jon writes:

From: jlewis@lewis.org To: "Mr. James W. Laferriere" <babydr@baby-dragons.com> CC: nanog@merit.edu Subject: Re: Odd problem on very old Cisco ios (OT) Date: Mon, 21 Feb 2000 00:46:39 -0500 (EST)

On Sun, 20 Feb 2000, Mr. James W. Laferriere wrote:

...

Silverdale#copy tftp flash Copy aborted. Flash address space cannot be written to.

2501's default to running from flash. If it let you blow away the flash while code was running from it, bad things would happen.

ena conf t config-register 0x2101 control-z reload [say no when it asks about saving changed config] [wait for router to boot up from ROM] ena copy tftp flash [answer questions about remote server ip and file name...wait for file to load...make sure it says checksum was good] conf t config-register 0x2102 control-z reload [say no when it asks about saving changed config]

This is the reason why you can't write to flash. Two things to keep in mind when updating IOS on this router: 1) IOS 11.0 is the minimum IOS that has been tested for Y2K compliance 2) You only have 4MB of flash, so you may have trouble finding an 11.0 image to fit in that space, considering that you may be running multiple protocols on it. You have 6MB of RAM, and 4MB of flash. IP images and IP/IPX images will fit into 4MB of flash, but anything beyond that (Desktop, which is IP, IPX, ATalk, DEC, etc), IP/IPX/IBM, and IP/IBM all require 8MB of flash. Good luck, -rb ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com