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0x0 registry value on next reload on Cat4006

When i reload:


Reload to the ROM monitor disallowed from a telnet line.

Set the configuration register boot bits to be non-zero.

... so i change the register

CS-4006-A#conf t

Enter configuration commands, one per line. End with CNTL/Z.


CS-4006-A(config)#config-register 0x2102



Building configuration...

Compressed configuration from 13077 bytes to 3733 bytes[OK]

but the sh ver state that register will be 0x0 at next reload !

CS-4006-A#sh ver

Cisco Internetwork Operating System Software

IOS (tm) Catalyst 4000 L3 Switch Software (cat4000-IS-M), Version 12.1(12c)EW, EARLY D

TAC Support:

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Thu 22-Aug-02 19:28 by hqluong

Image text-base: 0x00000000, data-base: 0x00CA7148

CRC32 failed for NVRAM at 0x54000000

Erasing NVRAM area at 0x54000000


Dagobah Revision 50, Swamp Revision 16

CS-4006-A uptime is 9 weeks, 4 days, 22 hours, 49 minutes

System returned to ROM by power-on

System image file is "bootflash:cat4000-is-mz.121-12c.EW.bin"

cisco WS-C4006 (MPC8245) processor (revision 7) with 262144K bytes of memory.

Processor board ID FOX064311H1

Last reset from PowerUp

96 FastEthernet/IEEE 802.3 interface(s)

26 Gigabit Ethernet/IEEE 802.3 interface(s)

467K bytes of non-volatile configuration memory.

Configuration register is 0x2102 (will be 0x0 at next reload)

WHhy ??


Re: 0x0 registry value on next reload on Cat4006


it seems to me like you might have problems with your NVRAM

(CRC32 failed for NVRAM at 0x54000000

Erasing NVRAM area at 0x54000000)

So I'd try to

1) backup the running config to tftp server

2) wr erase - clears the NVRAM

3) wr - saves the running config to the start-up config

4) sh start-up - checks if the wr command was successful

5) sh ver

The error message might disappear.

If it remains, I'd reload the switch. It's a little dangerous - if the NVRAM is damaged, you might loose your complete config.

6) confreg .....- set the config reisters to proper value in ROM monitor mode

7) boot ..... - manually from ROM monitor

8) sh ver - check the registers and NVRAM problem