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Deleted/Corrupted/Wrong Type/No IOS image and router won’t boot(cisco 2600)

Deleted/Corrupted/Wrong Type/No IOS image and router won’t boot: http://www.dslreports.com/faq/13824
Break Key Sequence: http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080174a34.shtml
ROMmon Recovery for the Cisco 2600 Series Router:

http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a0080094a0b.shtml

How to Download a Software Image to a Cisco 2600 via TFTP:

http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008015bf9e.shtml

For Cisco 2600 Router :

(a) Connect to the router via Teraterm (console port)

(b) Now Turned on the router

(c) Press ALT+b to go to rommon mode

(d)

     rommon 16 > IP_ADDRESS=192.168.1.66      ( Ip of the Router)
     rommon 17 > IP_SUBNET_MASK=255.255.255.0
     rommon 18 > DEFAULT_GATEWAY=192.168.1.254
     rommon 19 > TFTP_SERVER=192.168.1.64
     rommon 20 > TFTP_FILE=c2600-is-mz.113-2.0.3.Q
     rommon 21 > TFTP_CHECKSUM=0

Note: As detailed in Cisco bug ID CSCdk81077 (registered customers only) , for Cisco 2600 and 1720 Series Routers running the ROM monitor command tftpdnld, the command might report a bad checksum comparison when it loads Cisco IOS software images of Cisco IOS Software Release 12.0(2.2)T or later.

Note: As a workaround to this problem, set the ROM monitor variable TFTP_CHECKSUM to 0. This is done by defining the variable TFTP_CHECKSUM=0 from the ROM monitor set command, and then proceeding with the tftpdnld procedure.

)

   rommon 22 > tftpdnld

After finish the upload the new ios, type

rommon 23> sync

Then reboot the router agian,it will show  the old ios again.

This entry was posted on Thursday, December 24th, 2009 at 11:06 am and is filed under Cisco Router/Switch. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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