Upgrading the IOS on Cisco router 871W

timt976 · ‎04-05-2008

Hello,

I am trying to upgrade the IOS on my Cisco 871w. I have the enterprise IOS which required me to upgrade the flash. Well since I swapped out the flash the router is booting up to the ROMMON prompt. How do I get the new IOS on to the router?

Thanks,

Tim

kmccourt · ‎04-06-2008

Format the new flash and use the ROMMON tftpdnld command to download the new IOS image from a tftp server.

Essentially, you have to set the variables below and download via FE0, for example:

rommon 1 >IP_ADDRESS=192.168.1.10

rommon 2 >IP_SUBNET_MASK=255.255.255.0

rommon 3 >DEFAULT_GATEWAY=192.168.1.1

rommon 4 >TFTP_SERVER=192.168.1.20

rommon 5 >TFTP_FILE=c870-advipservicesk9-mz.124-15.T4.bin

rommon 6 >tftpdnld

Full instructions are at http://www.cisco.com/en/US/docs/routers/access/800/850/software/configuration/guide/rommon.html

timt976 · ‎04-06-2008

rommon 2 > ip_address=192.168.10.200

rommon 3 > ip_subnet_mask=255.255.255.0

rommon 4 > default_gateway=192.168.10.1

rommon 5 > tftp_server=192.168.10.21

rommon 6 > tftp_file=c870-advipservicesk9-mz.124-15.XY2.bin

rommon 7 > tftpdnld

Missing or illegal ip address for variable IP_ADDRESS

Illegal IP address

I enter all the commands but I am still getting that error. Is there something else I need to do first? Like change the config register.

Richard Burts · ‎04-06-2008

Tim

Try it again and this time put the commands into upper case rahter than lower case.

HTH

Rick

HTH

Rick