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New Member

Question regarding Boot variables on MSFC

I noticed on one of our 6509's with MSFC that it had the following boot statements:

boot system flash bootflash:c6msfc2-dsv-mz.121-13.E5.bin

boot system bootflash:c6msfc2-psv-mz.121-13.E14.bin

boot bootldr bootflash:c6msfc2-boot-mz.121-13.E14.bin

What is the difference between the first 2 statements?

also, I noticed that the first image name is not even in bootflash.

Directory of bootflash:/

1 -rw- 1787412 May 21 2004 07:58:18 c6msfc2-boot-mz.121-13.E14.bin

2 -rw- 13097736 May 21 2004 07:58:33 c6msfc2-psv-mz.121-13.E14.bin

3 -rw- 2071 Jul 31 2004 13:53:48 satrt

31981568 bytes total (17093964 bytes free)

Just wanted to get some clarification on how these boot variables work. Thanks.

2 ACCEPTED SOLUTIONS

Accepted Solutions
New Member

Re: Question regarding Boot variables on MSFC

Hello,

There is essentially no difference in the first 2 boot system statements, with the exception of the image name. The system will try to boot from bootflash: c6msfc2-dsv-mz.121-13.E5.bin first. If the file is not present it will move to the next sequential boot system command configured - boot system bootflash:c6msfc2-psv-mz.121-13.E14.bin. The 3rd command is for the boot image - this is a limited version of software if previous attempts to load the specified images fails and there isn't a valid image in flash. You will see router(boot) prompt if this image is loaded.

To verify boot variables from the MSFC you can issue the show boot command.

Hope this helps.

Regards,

James

Re: Question regarding Boot variables on MSFC

boot system flash bootflash:c6msfc2-dsv-mz.121-13.E5.bin is a valid boot variable.

boot system bootflash:c6msfc2-psv-mz.121-13.E14.bin is not a valid boot statement for MSFC, you need the "flash" keyword. However, if the config-register is set to 2102, this will boot into boot mode if reloaded, because the image "c6msfc2-dsv-mz.121-13.E5.bin" is not in the bootflash:. so it will boot the first available image in the bootflash which happens to be the boot loader.

To correct the boot variable remove the first and second boot statements:

config t

no boot system flash bootflash:c6msfc2-dsv-mz.121-13.E5.bin

no boot system bootflash:c6msfc2-psv-mz.121-13.E14.bin

then add the second boot statement:

boot system flash bootflash:c6msfc2-psv-mz.121-13.E14.bin

wr mem

show boot to confirm.

3 REPLIES
New Member

Re: Question regarding Boot variables on MSFC

Hello,

There is essentially no difference in the first 2 boot system statements, with the exception of the image name. The system will try to boot from bootflash: c6msfc2-dsv-mz.121-13.E5.bin first. If the file is not present it will move to the next sequential boot system command configured - boot system bootflash:c6msfc2-psv-mz.121-13.E14.bin. The 3rd command is for the boot image - this is a limited version of software if previous attempts to load the specified images fails and there isn't a valid image in flash. You will see router(boot) prompt if this image is loaded.

To verify boot variables from the MSFC you can issue the show boot command.

Hope this helps.

Regards,

James

Re: Question regarding Boot variables on MSFC

boot system flash bootflash:c6msfc2-dsv-mz.121-13.E5.bin is a valid boot variable.

boot system bootflash:c6msfc2-psv-mz.121-13.E14.bin is not a valid boot statement for MSFC, you need the "flash" keyword. However, if the config-register is set to 2102, this will boot into boot mode if reloaded, because the image "c6msfc2-dsv-mz.121-13.E5.bin" is not in the bootflash:. so it will boot the first available image in the bootflash which happens to be the boot loader.

To correct the boot variable remove the first and second boot statements:

config t

no boot system flash bootflash:c6msfc2-dsv-mz.121-13.E5.bin

no boot system bootflash:c6msfc2-psv-mz.121-13.E14.bin

then add the second boot statement:

boot system flash bootflash:c6msfc2-psv-mz.121-13.E14.bin

wr mem

show boot to confirm.

New Member

Re: Question regarding Boot variables on MSFC

sounds good. Thanks for the clarification.

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