crypto isakmp key 0 disappear

Unanswered Question
Mar 27th, 2008
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Hi all.

I have this problem with a 3640 router.

I've configured a vpn peer with command:

crypto isakmp key 0 <key> <address>

but router save this command in startup-config without the zero

crypto isakmp key <key> <address>

so when I reload it, ios can't insert this line into configuration

Is there any way to solve this problem?

I've tested many ios releases.

My "workaround" now is to configure password encryption aes, so ios save crypto isakmp key with a 6 before the encrypted key.

Is the only solution?

Thanks in advance.


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irisrios Wed, 04/02/2008 - 07:05
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Have you tried specifying key number other than 0 since 0 might be the default mode of the password which is normally assumed.


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