Can you pleas mark this

faizkarimullah baig · ‎05-02-2014

hi ,

we use 3900 router,today morning when i come to know my default-gateway not able to response,then i connected to console ,i came to know which is in rommon mode ,when i check few command ,noting impact.

in rommon mode i did use some commands plz check

rommon 1 > boot
Compact Flash0: Not present

rommon 2 > boot flash1:
program load complete, entry point: 0x4000000, size: 0x18fa0
boot: cannot determine first executable file name ondevice "flash1:"

rommon 3 > dir flash1:
program load complete, entry point: 0x4000000, size: 0x18fa0
Directory of flash1:

rommon 4 >reset

System Bootstrap, Version 15.0(1r)M6, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2010 by cisco Systems, Inc.

Total memory size = 1024 MB - DIMM0 = 512 MB, DIMM1 = 512 MB
CISCO3945-CHASSIS with C3900-SPE150/K9 with 1048576 Kbytes of main memory
Main memory is configured to 72/72(dimm 0/1) bit mode with ECC enabled

Readonly ROMMON initialized
Compact Flash0: Not present

System Bootstrap, Version 15.0(1r)M6, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupports
Copyright (c) 2010 by cisco Systems, Inc.

Total memory size = 1024 MB - DIMM0 = 512 MB, DIMM1 = 512 MB
CISCO3945-CHASSIS with C3900-SPE150/K9 with 1048576 Kbytes of main memory
Main memory is configured to 72/72(dimm 0/1) bit mode with ECC enabled

Readonly ROMMON initialized
program load complete, entry point: 0x4000000, size: 0x18fa0
boot: cannot determine first executable file name ondevice "flash1:"

System Bootstrap, Version 15.0(1r)M6, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2010 by cisco Systems, Inc.

Total memory size = 1024 MB - DIMM0 = 512 MB, DIMM1 = 512 MB
CISCO3945-CHASSIS with C3900-SPE150/K9 with 1048576 Kbytes of main memory
Main memory is configured to 72/72(dimm 0/1) bit mode with ECC enabled

Readonly ROMMON initialized
Compact Flash0: Not present

System Bootstrap, Version 15.0(1r)M6, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2010 by cisco Systems, Inc.

Total memory size = 1024 MB - DIMM0 = 512 MB, DIMM1 = 512 MB
CISCO3945-CHASSIS with C3900-SPE150/K9 with 1048576 Kbytes of main memory
Main memory is configured to 72/72(dimm 0/1) bit mode with ECC enabled

Readonly ROMMON initialized

rommon 2 > meminfo
-------------------------------------------------------------------
Current Memory configuration is:
DIMM0: Size = 512 MB : Start Phy Addr = 0x0_00000000 (interleaved)
DIMM1: Size = 512 MB : Start Phy Addr = 0x0_00000000 (interleaved)
-------------------------------------------------------------------
Main memory size: 1024 MB in 72/72(DIMM0/DIMM1) bit mode.
Available main memory starts at 0x1008000, size 1032160KB
Smart Init is enabled.
NVRAM size: 256 KB

Manufacturer's JEDEC ID code:
DIMM0: 7f94000000000000 (p/n SG572648FG8P0ILSG2)
DIMM1: 7f94000000000000 (p/n SG572648FG8P0ILSG2)

how to resolve this one ?

which cause this problem comes?

plz give me idea

Leo Laohoo · ‎05-02-2014

Your CF in Slot1 is not formated properly.

If you have a multi-card reader, format this with FAT16, copy the IOS into the CF and try again.

faizkarimullah baig · ‎05-02-2014

thank u for reply

can u plz tell me which cause that was happend like that because which was running for a long time good

condition but suddenly .

because as per my knowledge ,when that was good condition all configuration which is loaded in ram from flash card ,until then router restated this problem was not happend ?

Leo Laohoo · ‎05-03-2014

I am not sure. By default, your CF should be in Slot 0, but in your case, the CF is in Slot 1. So some human life form has taken what was in Slot 0 and something, instead, was used in Slot 1. Could be a third-party (and un-supported) CF in Slot 1. I don't know as I'm not there.

faizkarimullah baig · ‎05-03-2014

Yes you are right, what happened when this problem came i thought it may be problem in slot0 so that i manually changed to slot1.

i am not sure plz tell me this one point ,

Example:-if i erase flash card or problem in flash card, it never gives me error until then i restart the router. Because all my configuration and ios is loaded in ram?

but my case router is in rommon mode and flash card is empty, then i restarted the router but same result. so i changed flash card in another slot but same output.

And i connected a flash card in my system. card is working and no configuration files (empty) in flash card.

Leo Laohoo · ‎05-03-2014

Example:-if i erase flash card or problem in flash card, it never gives me error until then i restart the router. Because all my configuration and ios is loaded in ram?

but my case router is in rommon mode and flash card is empty, then i restarted the router but same result. so i changed flash card in another slot but same output.

Let me get this straight ... You ERASED all the contents of your CF?

If the answer to this is "yes" then your router is responding (by booting into ROMmon) as "normal". The router can't find a valid IOS therefore it goes into ROMmon.

Now if you want to load the IOS back, there are several ways of doing this.

1. Eject the CF and copy the IOS from the PC into the CF;

2. Boot the IOS from a supported USB thumb drive;

3. TFTPdnld; or

4. Xmodem

Your choice.

faizkarimullah baig · ‎05-04-2014

with this above info-

i came to know that "router need a ios only one time when router booting". when router found ios ,although any one deleted or problem in flash card, router never goes to rommon mode until i restart or power off

thanks a lot for your replay.

Leo Laohoo · ‎05-05-2014

Can you pleas mark this thread as "Answered"?

3900 ROUTER flash card not detecing