I came across this cool topic of Front-Door VRF (FVRF).
Front Door VRF is to isolate the underlay and overlay networks, both to avoid potential routing recursion issues as well as to add a layer of security by segmenting the underlay and overlay at L3.
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The specific topic is very interesting, and is associated with VRF-Aware IPsec. The truth is I haven’t found very much Cisco documentation about it, so it would make a good addition. Here is a link to Cisco documentation that mentioned it briefly…
Hi Pascal
I stumbled across the same topic a while ago - Denise Fishbourne has a cool blog on the topic including topologi and config examples.
Its quite easy to replicate her setup based on the blogpost.