Jun 26 2019
These are non-transitive extended communities. They can not cross an EBGP boundary, the deletion in policy-statement BGP_sanitize_in is perhaps superfluous.
Try the following, instead of 0, use 0.0.0.0
Jun 25 2019
To be researched: I'm not sure yet if bringing the validator closer to the routers (eg. in POPs) brings significant improvements. If so and once T96852 is solved, we could bring them closer to the POP routers.