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New Member

2 vpn tunnels over one interface

As the title suggests, I am trying two create to VPN tunnels over a single ISDN circuit. But, I am wondering how to apply two crypto maps to that single interface, and how the interface will know which one to use. If anyone has any experience or advice on this I would love to hear from you.

Cisco Employee

Re: 2 vpn tunnels over one interface


You can only apply one crypto map to an interface. You would need to define different instances of the same crypto map for the vpn tunnels that you are trying to create.

You can find a sample config at:

Please take a look at the configuration of the "Hub Router", there are multiple instances of the crypto map "mymap" defined.



New Member

Re: 2 vpn tunnels over one interface

Thanks for the link. What I want to do is a bit different than that. I'll try to explain it a little better: Router 'a' is a spoke conencted to the hub via IPSEC VPN. I would like to add router 'b', by creating a IPSEC VPN directly to router 'a', without traversing the HUB. It seems like I should be able to get it to work, but everything I've tried so far is failing.

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