Boot a Cisco router off of a USB Drive (Recovery option)

Hi all,

I would like to post this because this method has saved me when I upgrade my router with new ios. I used this as a recovery option. This will come in real handy if you are on-site with 128 MB to 1 GB USB Drive.

  •     Format your USB drive with FAT file system. This needs to be FAT and not FAT32  :)
  •     Copy the IOS image to the USB drive.
  •     Power off the router, plug in the USB flash drive to the USB port on the router.
  •     Power on the router and when it starts to boot up press the Break key to enter ROMMON mode.
  •     In ROMMON mode enter the following command to boot to USB:
                     boot usbflash0:    (e.g. boot usbflash0:c1800-io3-mz.123-26.bin)

When you are upgrading your IOS image after upload it via tftp please check the checksum before you boot from that image. it will help you to upgrade your ios without more hassle. ;)

Comments

Post a Comment

Popular posts from this blog

MRTG configurations

Setup the Device cisco(config)# snmp-server community public RO setup the MRTG server yum install   mrtg   -> will install the MRTG yum install httpd -> will install the apache to view the graphs crated by mrtg To configure the MRTG issue following command: Cfgmaker –global   “WorkDir: /var/www/mrtg” –output /etc/mrtg/mrtg.cfg   device-community - string @( hostname or IP ) in this command :             --global   “WorkDir: /var/www/mrtg”   -> this is global configuration to define where the graphs will be store - -output /etc/mrtg/mrtg.cfg    ->    this is the output file name   device community   string ->   Configured snmp name on the device. In this case it is ‘public’   as   configured under the cisco device hostname or IP  ->   device IP or hostname Now run the indexmaker...
Read more

ADSL configuration on Cisco router

PPPoA   with   Cisco 1700+ WIC-1ADSL I have configured following with Cisco 1700 series router which includes  WIC-1ADSL Card. Please make sure the IOS is latest than 12.2 Configure ATM interface with the PVC number, DSL Mode , encapsulation and dialer pool interface ATM0   no ip address   no atm ilmi-keepalive   dsl operating-mode auto   pvc 0/38   encapsulation aal5mux ppp dialer   dialer pool-member 1 In here please check the dsl operating mode and encapsulation with your ISP. Most probably dsl operating mode   will works with auto. But you should   have to check the encapsulation   with ISP[aal5snap/ aal5mux]. BT(United Kingdom) use aal5mux. After that you have to configure the dialler interface with ADSL username and password accordingly PPPoA with Dynamic IP interface Dialer1   ip address negotiated   ip nat outside   encapsulation ppp   dialer pool 1 ...
Read more