From: Jason1 (Jason1@xxxxxxxxxx)
Date: Wed Dec 05 2001 - 04:28:20 GMT-3
2. You can make use of static route or default route on the router you are upgr
ading.
Jason
---------- Original Message ----------------------------------
From: "Christopher A. Jarosz" <cajarosz@mediaone.net>
Reply-To: "Christopher A. Jarosz" <cajarosz@mediaone.net>
Date: Tue, 04 Dec 2001 20:37:38 -0800
>Hi Jaspreet !!
>
>Since the 25XX series runs the stored IOS from flash, it always marks the flas
h
>as read only. The way to load a new image is....
>
>1) Prepare to run from the boot roms
>
>config t
>conf-reg 0x2101
>cntl <Z>
>write mem
>reload
>
>2) After the router reboots, you will see that the router's flash is now
>read/write. Copy the new image to the router via the "copy tftp flash"
>command. ** Please note ** the 25XX doesn't have routing enabled while
>running the IOS on the bootroms, so you'll need to have the TFTP server on the
>lan segment that directly connects to the router that you're upgrading.
>
>3) After the image has been copied and the checksum is good, do the following
:
>
>config t
>conf-reg 0x2102
>ctl <z>
>reload
>
>** DO NOT WRITE THE RUNNING CONFIG TO MEMORY. While you are running from the
>bootflash roms, it may (read WILL) not understand any configuration commands
>from the higher version of IOS in NVRAM, so any commands (say from 12.0) would
>be lost on the reboot.
>
>After the router reloads, you should be running from the new ios image. After
>it successfully loads, you can then do a "write mem". The router will ask you
>to confirm the write of config data from a previous ios level. Say "yes", and
>you'll be off and rocking on the new release.....
>
>HTH....
>
>chrisj
>
>Jaspreet Bhatia wrote:
>
>> Folks,
>> I have about 5 2511 routers taht I am trying to upgrade
>> to 12.1 .The problem is that the flash is read-only so will not allow me to
>> do anything on the flash .Is there a way to convert that flash into a R/W
>> flash ?
>>
>> Thanks for your help
>>
>> Jaspreet
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