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[Xen-users] Connecting dom0's with VPN?



Hi there,

I have two dom0 hosts with two network interfaces.

One of those interfaces is configured with an IP address and is the 'service entrance' for maintenance of the host.

The other interface is allocated to the Xen bridge and does not have IP addresses assigned to it.

The two dom0 hosts are connected on this interface with a crossover cable. This forms a network for the domU virtual machines on each dom0 and some of these domU machines replicate disk via this crossover cable with drbd and also do heartbeat monitoring.

So far this is all working perfectly.

I would like very much to be able to seperate the two physical hosts and to temporarily place them into different facilities.

A really really long crossover cable is out of the question.

What I am thinking of is creating a VPN between the two machines however I'm not sure how to do this.

I am thinking that if I create a VPN tunnel between the two sites and then connect the bridged interface to the VPN this won't work. Or will it? Remember that the bridged interface itself doesn't have an IP address. And I'm not sure how OpenVPN would react to passing packets from the Xen bridges.


Can anyone please offer any suggestions as to how to create a tunnel between these two hosts (to simulate the crossover cable)?

Thanks!




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