Boot 3750 from tftp

[Pavel Doronin]

Tell me please is there any way to boot catalyst 3750 (3560, 2960) switch from tftp?

[Collin Clark]

There really is only one way...if you're looking for suggestions, use FTP and if you're in a secure environment (which I guess you're not if you're using TFTP) use SCP.

[Pavel Doronin]

Thanks but what command i must use?

boot system ftp://xxx.xxx.xxx.xxx/3750.bin

I'm tryed to use

boot system tftp://xxx.xxx.xxx.xxx/3750.bin

and it did not work.

Output was No such device.

P.S. Ping works fine

[Jon Marshall]

Pavel

Are you using the correct filename for the image. See this link for full details of setting up to load image from tftp -

https://supportforums.cisco.com/community/netpro/network-infrastructure/switching/blog/2011/07/20/booting-cisco-router-from-a-tftp-server

note, i have not used this on a 3750 switch so it may or may not work, you will need to test.

Jon

[Somasundaram Jayaraman]

Hi,

I think it is not possible to boot 3750 switch using tfp. you can try auto install feature.

i have mentioned below the link for auto install feature

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/ffun_c/ffcprt1/fcf002.htm#wp1012146

Otherwise we left with xmodem recovery.

Hope this helps.

Cheers
Somu

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[Leo Laohoo]

Can you elaborate what you are trying to do?

[Pavel Doronin]

on Catalysr 3750G i try to

boot system tftp://xxx.xxx.xxx.xxx/file.bin

May be i must set any variables in rommon mode?

[Leo Laohoo]

Are you trying to boot your appliance from a missing or corrupt IOS?

Recovering Catalyst Fixed Configuration Switches from a Corrupted or Missing Image

[Pavel Doronin]

I try to load IOS that is more than my Catalyst flash )))

[Leo Laohoo]

I try to load IOS that is more than my Catalyst flash

Ok, then why not delete the un-necessary files so the BIN file can fit into your appliance's flash memory?

Can you post the command "dir flash:" please?

[Pavel Doronin]

IOS file 20 MB

Flash size 16 MB

Not a variant ))

[Leo Laohoo]

IOS file 20 MB

Hold on.  WHAT file are you talking about?  The TAR file (is > 16 mb) or the BIN file (<14 mb)?  You should upload the BIN file as per the link I've posted.

If you have a TAR file then use a free proggie called WinRAR to unpack it.

[Pavel Doronin]

*.bin file is 20MB

[Leo Laohoo · Accepted solution]

*.bin file is 20MB

Ok then.  I think I know WHY you are in this predicament.  Anyways ...

Download the IOS version 12.2(55)SE.  For a 3750 with only 16mb of flash, this version (55) is the highest you can go.  It says so in the 12.2(58)SE Release Notes.

[Pavel Doronin]

Long time ago i boot 2500 router directly from tftp, because ios image was bigger than flash on 2500 router and it works fine!

I try to find the way to do this on Cat3750.