[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1889
  • Last Modified:

cisco 4506 boot Problem


I got a Problem with cisco 4506 switch booting..

it is going to ROMMON mode while restarting the device but in ROMMON mode , if i give the BOOT command , it is booting well and remaining things are fine.

Configuration register is 0x2102  now and  Boot system is configured from Flash..

I just worrried  that , if it gets down when man resources are not availble , then it would be a problem as it needs a manual intervention to assign boot command from ROMMON mode

pls help on this

1 Solution
You may have an improperly set bootvar from an upgrade?  You can check it with the following:

Switch#dir bootflash:
Directory of bootflash:/

    1  -rw-     6516904   Aug 13 2000 13:37:13  cat4000-is-mz.121-11b.EW

61341696 bytes total (54824664 bytes free)

Switch#show bootvar
BOOT variable = bootflash:cat4000-is-mz.121-8a.Ew,1
CONFIG_FILE variable does not exist
BOOTLDR variable does not exist
Configuration register is 0x2102

They don't match so change it with the following replacing with your  code values:

Switch#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#no boot system flash bootflash:cat4000-is-mz.121-8a.Ew
Switch(config)#boot system flash bootflash:cat4000-is-mz.121-11b.EW
Switch#write memory
Building configuration...
Compressed configuration from 4359 bytes to 1730 bytes[OK]

Then verify it was written with the following:

Switch#show bootvar
BOOT variable = bootflash:cat4000-is-mz.121-11b.EW,1
CONFIG_FILE variable does not exist
BOOTLDR variable does not exist
Configuration register is 0x2102
RAMU CHAuthor Commented:

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now