I encountered something similar with IOS 12.1.10 enterprise on the 2500 series. I reported it to Cisco and posted something on the list here a month or two back.
There is a bug in some of the 12.1 codes. ""Andrew Larkins"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hi all, > > I was upgrading some 2600's yesterday with new flash and DRAM. > The router boots up into rommon mode correctly. All the TFTP variables are > then set and the code uploaded. Problem is that when the code is finished I > get an error about invalid checksum. Downloaded some new code and same > results. > Eventually, through sheer frustration I tried IOS 11.3 IP only. This worked. > I then reloaded the router for the new code to take effect. I was now able > to upload the IOS 12.2.12 that I was originally trying. Worked perfectly. > Routers are 100% stable. > > Anyone else have problems like this?? > > Andrew Larkins > BCom, CCNP, CCDP > Bytes Technology Networks > A Division of the Bytes Technology Group > A Member of the Altron Group > www.btgroup.co.za > visit the press office @ www.itweb.co.za/office/bytes > > Tel : +27 11 800 9336 > Fax : +27 11 800 9496 > Mobile : +27 83 656 7214 > Email : [EMAIL PROTECTED] > OR [EMAIL PROTECTED] > > "This e-mail and its attachments may contain information that is > confidential and that may be subject to legal privilege and copyright. If > you are not the intended recipient you may not peruse, use, disclose, > distribute, copy or retain this message. If you have received this message > in error, please notify the sender immediately by e-mail, facsimile or > telephone and return and thereafter destroy the original message. > > Please note that e-mails are subject to viruses, data corruption, delay, > interception and unauthorised amendment, and that the sender does not accept > liability for any damages that may be incurred as a result of communication > by e-mail. > > No employee or intermediary is authorised to conclude a binding agreement on > behalf of the sender by e-mail without express written confirmation by a > duly authorised representative of the sender. > > By transmitting this e-mail message over the Internet the sender does not > intend to allow the contents hereof to become part of the public domain, and > the confidential nature of the contents shall not be altered or diminished > from by such transmission." Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54871&t=54871 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]