Dual IPSEC VPN tunnel on single remote peer

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Aug 28th, 2007
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is it possible to establish two IPSEC VPN tunnels to a single remote peer?


I currently have two ISP connections and i wanted to make two tunnels for failover but im not sure if there is an issue on the tunnel groups since i would end up having only on tunnel group for both the tunnel.



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mattiaseriksson Wed, 08/29/2007 - 05:16
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How is your internet redundancy configured? Are you using PIX,ASA,IOS or what?

brianbono Wed, 08/29/2007 - 06:30
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Im currently using an ASA that is configured with a static route tracking feature.

mattiaseriksson Wed, 08/29/2007 - 07:40
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If you have PIX/ASA/VPNC on both ends you can use the backup Lan-to-Lan feature.


The end that will connect to multiple ip-addresses should be configured as originate-only with the set connection-type command, and use the crypto map set peer command to order the priority of the peers.


The other end should be configured with the answer-only keyword.


The originate-only end attempts to negotiate with the first peer in the list. If that peer does not respond, the ASA works its way down the list until either a peer responds or there are no more peers in the list.

brianbono Wed, 08/29/2007 - 09:02
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I have a cisco asa on my end but on the remote end is a multitech firewall.


how do i go about this?

mattiaseriksson Wed, 08/29/2007 - 09:43
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In that case I am not sure. But if the other end permits multiple peer statements you can try to just configure your end as answer-only, or do nothing and see what happens. It mostly depends on how the multitech handles redundancy, the ASA side only has one address to connect to.


A router on each side eould provide much better redundancy by running DMVPN.

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