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Home > Archive > CCNA > October 2003 > Confreg and IOS questions
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Confreg and IOS questions
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| MachMustang 2003-10-29, 8:05 am |
| In class we have several models of 2600 series routers. I've noticed that some of them when using the Confreg command to change the boot order require a different # (0xnnn2 as such)to boot to the same area (such as flash). Some give 0x2142, while some give 0x2102. What determines the n's in 0xnnn2?
How can a router lose a IOS in flash without it being overwritten or deleted? Several of our routers in class sometimes just lose the IOS in flash for no reason what so ever. Needless to say, we get alot of experience with Xmodem in ROM mode to fix this. Anyone have any suggestions on either or both of these?
Thanks | |
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| some has 2102 as default, read the documentation for its specific platform and version.
for config register meaning, consult
http://www.cisco.com/univercd/cc/td...000qs/22812.htm
prolly just another class messing with your class ;/ dunno, my mind is mush at the moment so can't think. | |
| Yankee 2003-10-31, 7:34 pm |
| 0x2102 is for normal operation. 0x2142 by passes NVRAM (startup-config) during boot and is typically used for password recovery.
Routers don't lose the IOS in flash by themselves. If you start in ROMMON mode it doesn't mean the flash is necessarily empty. Change to 0x2142 in ROMMON then reload. If it boots properly that time look for an improper boot system flash statement in the config. If it still goes to ROMMON then someone may be messing with you by erasing the flash.
Yankee |
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