Collecting core dump on CISCO 4451 router - TFTP timing out

[jc12]

I'm trying to copy a core dump from my Cisco 4451 router, but it keeps timing out when the file is almost done being transferred.  

> copy bootflash:/core/<core dumbe> tftp: < server IP>

> timeout error occurs once the file is almost complete.

Is there something that can be done to prevent this or is the file just too big and I need to get someone to console in and copy to a usb device or something?

[Leo Laohoo]

Archive the files in the coredump folder and then export it out.

[jc12]

I don't suppose you could point me in the right direction of some documents for doing this on the router.

[Leo Laohoo]

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@jc12 wrote:

I don't suppose you could point me in the right direction of some documents for doing this on the router.

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archive tar /create <FILENAME>.tar bootflash:/core

[jc12]

All this did was may a bigger file, which is the issue I believe.

[Georg Pauwen · Accepted solution]

Hello,

not sure which TFTP server software you are using, but try the Solarwinds server, maybe it is the software that causes your problem...

https://www.solarwinds.com/free-tools/free-tftp-server

[jc12]

Well Solarwinds worked!  I was using 3CDaemon.  Was going to try the blocksize next but didn't need to this time.

[Georg Pauwen]

Hello,

you could try and change the TFTP blocksize. Try different values...

4451(config)#ip tftp blocksize