Router config-register 0xC502

Tuvshinbayar Turtuvshin · ‎06-01-2010

Hi All,

I have Cisco 2811 Router and few days ago my router doesn't work correctly. I checked config and found config-register waas changed (0xC502).

HUV_Murun#sh version

Cisco IOS Software, 2800 Software (C2800NM-IPBASE-M), Version 12.4(9)T7, RELEASE SOFTWARE (fc3)

Technical Support: http://www.cisco.com/techsupport

Compiled Thu 10-Jan-08 16:35 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

HUV_Murun uptime is 23 hours, 36 minutes

System returned to ROM by power-on

System image file is "flash:c2800nm-ipbase-mz.124-9.T7.bin"

Cisco 2811 (revision 53.50) with 251904K/10240K bytes of memory.

Processor board ID FHK1228F2RY

2 FastEthernet interfaces

1 Serial interface

6 Channelized E1/PRI ports

DRAM configuration is 64 bits wide with parity enabled.

239K bytes of non-volatile configuration memory.

62720K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0xC502

Anybody know what is the meaning of this config-register (0xC502) and how can be changed config ?

BR,

Tuvshuu

Leo Laohoo · ‎06-01-2010

how can be changed config

Go to configuration mode and enter the command "config-register 0x2102".

Use of the Configuration Register on All Cisco Routers

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a008022493f.shtml

Please don't forget to rate useful posts. Thanks.

michael.leblanc · ‎07-14-2010

Tuvshuu:

Although I have not used it in a very long time, there is a free software utility "Config Reg Calculator" offered by Boson, which "allows you to determine what a router will do given the configuration register value".

It is available at:

http://www.boson.com/FreeUtilities.html

Perhaps it might be of interest to you.

Best Regards,

Mike

haneez2949 · ‎10-22-2012

Tuvshuu::

config-register (0xC502) means

C- 15th and 14th bit set

14th-IP broadcasts do not have network numbers

15th-Enable diagnostic messages and ignore NVRAM contents

5- 8th & 10th bit set

8th-Break disabled

10th-IP broadcast with all zeros

0-

2-Boot field

Thanks and regards.

HNZ

Thanks HNZ