From: emonk@xxxxxxx
Date: Thu Dec 06 2001 - 13:37:03 GMT-3
Ben,
My point was that manually putting the router into boot
rom mode 0x2101 was not the only way to upgrade the
flash in a 2500. (CCIE level work should train you to
stay open to all aspects of how to accomplish a task.)
That is why I had the Cisco Works comment in my note and
mentioned your routing is not disabled if you do not put
it in boot rom mode manually.This keeps open the
possibility of using other methods. Cisco Works for
instance and it functions very close to what Phil
described. Booting the router from a TFTP type server.
Then upgrading the flash. Etc...
Then there is the way I described. Uses the on board
flash load helper. It does the work for you but it does
disable routing and does go into boot rom. So you have
to be on a local segment/interface.
That leaves you at least 2 ways to do the upgrade with
software. One way only works on a local segment. The
other way you can do a remote load. As well as at least
one more different way I can think of off the top of my
head to accomplish this flash upgrade without changing
the boot register to 0x2101.
> Phil, et al:
> Emonk says that he never goes into boot mode. Even by your own post the
> router goes into boot mode. He does not manually reboot the router into
> boot mode by changing the config registers himself, but the router does go
> into boot mode. It is all a matter of the flash can not be written to when
> the IOS is running from that flash. He is on a local segment so no need to
> set a gateway so when the router starts pulling the image all is well.
> Router completes pull and reloads.
> Ben P.
>
> -----Original Message-----
> From: Phil [mailto:ciscostudent1@yahoo.com.br]
> Sent: Thursday, December 06, 2001 7:08 AM
> To: Parrish, Ben; ccielab@groupstudy.com
> Cc: 'emonk@att.net'; 'jasbhati@cisco.com'
> Subject: RE: Important: Read -only flash on 2500 routers
>
>
>
> Sorry but Emonk is right.
>
>
> I've always upgraded my 2500 images the way he states. What happens is that
> before starting the copy itself the router reboots and puts itself in
> bootrom so, obviously, you lose connectivity with the router if you're not
> connected to the console but the upgrade happens (unless the image is
> corrupted or you have any other unexpected problem). I particularly don't
> like this behavior so what I do is to make the router boot from tftp with an
> ip only image about 5M in size (this image is small enough to fit the 2500
> DRAM - all my 2500 have 16MB). After that I can do whatever I want, erase
> flash, copy from tftp, etc and the router won't reboot during the process,
> it will behave like any router running IOS from RAM.
>
>
> Phil.
>
>
>
> "Parrish, Ben" <parrisb@netsolve.net> escreveu:
>
>
> All,
> I have to Disagree. As stated previously by another poster the
> 2500 runs the IOS from flash. Therefor you can not write to the flash
> partition in use.
>
> If you have a large enough flash you can partition your flash and then
> write to the second partition. After the image is on the second
> partition, use a "boot system flash" command to boot from the second
> image. By pushing the image down to the router while it is fully
> functional there is no need to put the router into boot mode.
>
> Benjamin Parrish
> Customer Engineering
> NetSolve, Inc.
> Austin Network Management Center
>
> -----Original Message-----
> From: emonk@att.net [mailto:emonk@att.net]
> Sent: Wednesday, December 05, 2001 10:02 AM
> To:: Jaspreet Bhatia
> Cc: ccielab@groupstudy.com
> Subject: Re: Important: Read -only flash on 2500 routers
>
> Jaspreet and everyone.
>
> HOW WOULD YOU REMOTELY UPGRADE YOUR IOS IF YOU HAD TO GO
> INTO BOOT ROM MODE? WOULD CISCO WORKS BE ABLE TO UPGRADE
> YOUR IOS? Here is the answer.
>
> I just upgraded my 2501 without going into boot rom mode
> 2101. I kept my reg at 2102. My setup was my PC attached
> to a CAT5000 switch and the routers eth0 to the same
> vlan on the switch. Both on the same subnet obviously. I
> used the Cisco TFTP server.
>
> Then all I did was issue the copy TFTP: Flash: command
> and I upgraded my IOS from 11.2 to 12.16. The only thing
> that I did was change the name of the file to have an
> 8.3 extension. Example "1216FW56.bin" Sometimes
> Windows95/98/ME does not like Unix style file names.
>
> After upgrading reboot the router and do a write mem.
> Just like several other guys said. Changing the boot reg
> works but it is harder. Not changing it keeps your
> routing functional and you can do a remote flash upgrade.
> > >Jaspreet Bhatia wrote:
> > >
> > >> Folks,
> > >> &nb sp; 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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