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What is the difference between config-register (0X2101) and (0X2102)?

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Question ajoutée par Marsed Elamin Elmamoun Ahmed , Senior IT Engineer (Part time) , KHADARNA CO.LTD
Date de publication: 2013/09/05
Abdullah Al-Bataineh
par Abdullah Al-Bataineh , Senior NOC Engineer , viacloud

0x2101
  • Boots into bootstrap
  • Ignores break
  • Boots into ROM if initial boot fails
  • 9600 console baud rate
0x2102
  • Ignores break
  • Boots into ROM if initial boot fails
  • 9600 console baud rate default value for most platforms

0x2101 is used when there is one IOS version is flash.0x2102 is used when there is more than one ios version in flash. You need to specify the ios version using command:

 

boot system flash:

Jahangeer Peer Mohamed
par Jahangeer Peer Mohamed , Network Infrastructure Architect , IBM

0x2101: boot from ROM (mini-IOS from ROM)•Boots into bootstrap•Ignores break•Boots into ROM if initial boot fails•9600 console baud rate0x2102: the default setting of config reg. (IOS from Flash & startup-config from NVRAM)•Ignores break•Boots into ROM if initial boot fails•9600 console baud rate default value for most platforms

Below is the useful link explains the use of the Configuration Register on All Cisco Routers.

http://www.cisco.com/en/US/products/hw/routers/ps13/products_tech_note09186af.shtml

 

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