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config-register 2101 on Cisco 4507 issue

Currentlt I have a Cisco 4507 has the following info.

Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-IPBASEK9-M), Version 12.2(40)SG, RELEASE SOFTWARE (fc2)

Technical Support:

Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Wed 07-Nov-07 18:51 by prod_rel_team

Image text-base: 0x10000000, data-base: 0x117EBBE8

ROM: 12.2(31r)SGA1

Dagobah Revision 226, Swamp Revision 34

Switch uptime is 2 minutes

Uptime for this control processor is 2 minutes

System returned to ROM by power-on

System image file is "bootflash:cat4500-ipbasek9-mz.122-40.SG.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

cisco WS-C4507R-E (MPC8245) processor (revision 10) with 262144K bytes of memory.

Processor board ID FOX1209GL5P

MPC8245 CPU at 266Mhz, Supervisor II+

Last reset from PowerUp

1 Virtual Ethernet interface

100 Gigabit Ethernet interfaces

511K bytes of non-volatile configuration memory.

Configuration register is 0x2101

Is the config-register 2101 correct ?

It should be 2102 ? any advise Thanks


Re: config-register 2101 on Cisco 4507 issue


Yes you are correct, you want the config register to read 0x2102, a setting of 0x2101 will result in the router/switch booting into bootstrap mode when it reboot.

Bootstrap mode is used for you to run a mini IOS, when your main IOS image is corrupt, this lets you config an IP address so you can download a proper full image.



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