Thursday, June 17, 2021

Policy Based VPN - Same Encryption domain on tunnels to 2 sites

We have a customer who wishes to tunnel to us using an active/standby (2 VPN endpoints, 1 encryption domain) policy based VPN tunnel from one datacenter of theirs, to 2 datacenters of ours.

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We reverse route inject our policy based tunnels then redistribute the static routes into bgp. With this customers request, our network would have 2 bgp route entries to the customer, with only one of them being viable at any given time depending on which tunnel (Site A or Site B) is active at that particular moment in time.

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Is there anyway with policy based VPNs to essentially withdraw routes for tunnels that are down, or some other clever trick I can use to have my networks route back to the customer only through the site with the active VPN tunnel?

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All VPNs involved are Cisco ASAs. Appreciate any opinions, and let me know if I can answer any questions.



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