Core Switch 4507R Register code 0x5

[jlwomeld]

On Saturday out NOC exper a hard power outage,when power was restored one of my 4507R came up in RMON mode i booted from flash. I notice that the config register was set to 0x5 what would have cauesed this?

[Georg Pauwen]

Hello,

I think configuration register 0x5 means that you boot from TFTP. Do you have anything in your configuration that says something like 'boot * tftp *' ?

Regards,

GP

[paragm]

Hi :

config register 0x5 would, since bit 13 is unset,it disables Boot default Flash software if network boot fails (0x2000)

02 to 0F : Specifies a default filename for booting over the network; enables boot system commands that override the default filename.

So your network boot / boot system commands failed and that caused to get into rommon mode.

Check your configs, and change the config-register to recommended 0x2102.

Following link will give you more information on all config-register bits :

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/12_1e/swconfig/supcfg.htm#wp1021899

Hope it helps.

Thanks

Parag.