From: Christopher M. Heffner (cheffner@certified-labs.net)
Date: Wed Oct 09 2002 - 18:50:32 GMT-3
The flash detail shows that the 2501 router is equipped with 2 - 4 mb
flash simms.
The 2500 series will NOT do a file transfer via the console port like
you can do in the 1700/2600/3600 series routers since you have a RXBoot
image in the roms.
If you have tried to download the file multiple times and it refuses to
work then one of two problems has occurred.
First problem: The original file on the tftp fileserver is corrupt.
Second problem: One of the two 4 mb flash simms (if not both) are bad
and will need to be replaced. I would look at getting two new 8 mb
flash simms for the 2500 series router. (This is more than likely the
problem.)
If you buy 3rd party flash simms for your router you might also need to
upgrade your boot roms.
This should fix the problem.
Christopher M. Heffner
Strategic Network Solutions, Inc.
Certified Cisco Systems Instructor
Installation and Maintenance of Cisco Routers Course Director
CCIE, CCSI, MCT, MCSE, MCNI, MCNE, CLI, PCLP, FCSE, CTT, ASE, A+
> -----Original Message-----
> From: David L Stewart [mailto:D.Stewart@mail.UTexas.edu]
> Sent: Wednesday, October 09, 2002 7:27 AM
> To: ccielab@groupstudy.com
> Subject: RE: OT: Urgent Help req on 2501
>
>
> Some folks put 12MB flash in a 2500. It works if you put
> 8MB in the first slot and 4MB in the second slot. The only
> problem is that the FLASH size routine will report 16MB.
>
> If you load an IOS over 12MB it will never pass the CRC
> check. This is because the last 4 MB is mirrored from
> 13MB to 16MB and gets written over. And you will always
> crash when you try to run it.
>
> Try loading the smallest IOS you can through the console
> port. This will get let you boot. Then, you can play
> with it and see what is wrong.
>
> At 08:43 AM 10/8/2002, Zeb Khan wrote:
> >Thunai,
> >
> >There is another option but it does not appear to be open to you. I
> >have
> >put the flash in the other router, in the second back and copied it
> >across. You have 2x4M so cannot do this.
> >
> >I would tend to think if you have copied runnignIOS from a
> working 2500
> >and still get the error, that there is a problem with the flash.
> >
> >Zeb ;-(
> >
> > >>> <thunai@netsol.co.in> 10/08/02 11:30am >>>
> >Hai
> > I tried this from router to router and from tftp to this
> >router both giving me the same message
> >
> >
> >warm regsd
> >thunai
> >
> >
> > > -----Original Message-----
> > > From: Zeb Khan [SMTP:zeb.khan@environment-agency.gov.uk]
> > > Sent: Tuesday, October 08, 2002 3:55 PM
> > > To: ccielab@groupstudy.com; thunai@netsol.co.in
> > > Subject: Re: OT: Urgent Help req on 2501
> > >
> > > If you are getting the same message each time, it would indicate
> > > that your file is bad. When it is copied, you need to
> make sure it
> > > was copied as a binary file, otherwise it screws up the checksum
> > > (gets dealt with as an ASCII file)
> > >
> > > The best way to copy the IOS is to get it from another router. If
> > > this is available to you, set it up as a tftp server and crack on.
> > >
> > > Drop me a mail direct if you need more help
> > >
> > > >>> <thunai@netsol.co.in> 10/08/02 11:00am >>>
> > > Hai group ,
> > > Cisco 2501 is giving me the following error
> message when
> > > do an ios upgrade
> > >
> > >
> > > Verifying checksum... invalid (expected 0x8007, computed 0xC97F)
> > > Flash copy took 0:04:56 [hh:mm:ss]
> > >
> > >
> > > Flash copy took 0:04:56 [hh:mm:ss]
> > > Router(boot)#show flash
> > >
> > > System flash directory:
> > > File Length Name/status
> > > 1 7433568 c2500-i-l.120-7.T2.bin [invalid checksum]
> > > [7433632 bytes used, 954976 available, 8388608 total]
> > > 8192K bytes of processor board System flash (Read/Write)
> > >
> > > Router(boot)#
> > >
> > >
> > >
> > > Router(boot)#show flash detailed
> > >
> > > System flash directory:
> > > File Length Name/status
> > > addr fcksum ccksum
> > > 1 7433568 c2500-i-l.120-7.T2.bin [invalid checksum]
> > > 0x40 0x8007 0xC97F
> > > [7433632 bytes used, 954976 available, 8388608 total]
> > > 8192K bytes of processor board System flash (Read/Write)
> > >
> > >
> > >
> > > Router(boot)#show flash err
> > >
> > > System flash directory:
> > > File Length Name/status
> > > 1 7433568 c2500-i-l.120-7.T2.bin [invalid checksum]
> > > [7433632 bytes used, 954976 available, 8388608 total]
> > > 8192K bytes of processor board System flash (Read/Write)
> > >
> > > Chip Bank Code Size Name
> erase write
> > > 1 1 89A2 1024KB INTEL 28F008SA
> 0 0
> > > 2 1 89A2 1024KB INTEL 28F008SA
> 0 0
> > > 3 1 89A2 1024KB INTEL 28F008SA
> 0 0
> > > 4 1 89A2 1024KB INTEL 28F008SA
> 0 0
> > > 1 2 89A2 1024KB INTEL 28F008SA
> 0 565367
> > > 2 2 89A2 1024KB INTEL 28F008SA
> 0 0
> > > 3 2 89A2 1024KB INTEL 28F008SA
> 0 0
> > > 4 2 89A2 1024KB INTEL 28F008SA
> 0 0
> > > Router(boot)#
> > >
> > >
> > > Please give your suggestions is the flash bad , or can i do
> > > some workaround to me it work ..
> > >
> > > Thanks in advance
> > > warm regds
> > > thunai
> > >
> > >
> > >
> > >
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