2610 0x2101 problem

Answered Question
Mar 10th, 2010
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Hello,


I have this 2610 router and I'm trying to flash a new IOS.  The router was given to us so we do not have the passwords.


I get to rommon and do "confreg 0x2101" then "reset" to reboot the router.


The problem is that it loads the installed IOS normally; with the configuration and everything.  It's like it's completely ignoring the confreg command.




Any ideas?

Correct Answer by Jon Marshall about 7 years 3 months ago

scott.bridges wrote:


Hello,


I have this 2610 router and I'm trying to flash a new IOS.  The router was given to us so we do not have the passwords.


I get to rommon and do "confreg 0x2101" then "reset" to reboot the router.


The problem is that it loads the installed IOS normally; with the configuration and everything.  It's like it's completely ignoring the confreg command.




Any ideas?

Scott


0x2101 just tells the router to load the first IOS it finds in flash and it will use the saved config. If you are trying to do a password recovery and want to bypass the saved config you need to use 0x2142. See this link for full details -


http://www.cisco.com/en/US/products/hw/routers/ps259/products_password_recovery09186a0080094675.shtml


Jon

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Correct Answer
Jon Marshall Wed, 03/10/2010 - 17:30
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scott.bridges wrote:


Hello,


I have this 2610 router and I'm trying to flash a new IOS.  The router was given to us so we do not have the passwords.


I get to rommon and do "confreg 0x2101" then "reset" to reboot the router.


The problem is that it loads the installed IOS normally; with the configuration and everything.  It's like it's completely ignoring the confreg command.




Any ideas?

Scott


0x2101 just tells the router to load the first IOS it finds in flash and it will use the saved config. If you are trying to do a password recovery and want to bypass the saved config you need to use 0x2142. See this link for full details -


http://www.cisco.com/en/US/products/hw/routers/ps259/products_password_recovery09186a0080094675.shtml


Jon

scott.bridges Thu, 03/11/2010 - 07:33
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Thank you!


Whatever page I was using for that 2101 was obviously incorrect.


I now have the router wiped with a default config.  I'm trying to load an updated IOS on here.  My TFTP server is 10.1.1.1 255.255.255.0 and I *am* able to ping the router from my computer (tftp server).  However, I cannot ping the computer *from* the router.  So I cannot TFTP.


int ethernet 0/0

ip address 10.1.1.2 255.255.255.0

no shut


ip route 0.0.0.0 0.0.0.0 ethernet 0/0


copy tftp: flash:

10.1.1.1

filename.bin


And it times out.  Am I missing something obvious?

Jon Marshall Thu, 03/11/2010 - 10:15
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scott.bridges wrote:


Thank you!


Whatever page I was using for that 2101 was obviously incorrect.


I now have the router wiped with a default config.  I'm trying to load an updated IOS on here.  My TFTP server is 10.1.1.1 255.255.255.0 and I *am* able to ping the router from my computer (tftp server).  However, I cannot ping the computer *from* the router.  So I cannot TFTP.


int ethernet 0/0

ip address 10.1.1.2 255.255.255.0

no shut


ip route 0.0.0.0 0.0.0.0 ethernet 0/0


copy tftp: flash:

10.1.1.1

filename.bin


And it times out.  Am I missing something obvious?


Scott


If you can ping the router from the computer but not the other way around then you should check to see if there is a personal firewall on the computer blocking incoming traffic.


Jon

Leo Laohoo Thu, 03/11/2010 - 13:14
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Firewall on the PC?

Leo Laohoo Wed, 03/10/2010 - 17:31
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The password recovery procedure states that initial bootup, the config-registry should be 0x2142.  I have no idea what proceedure you are following.

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