Conditional BGP redistribution of static routes

[mokaz]

Hi there,

I'm trying to figure out how could I conditionally redistribute static routes (present on ONS_2 in my uploaded representation) within BGP.
The static routes at ONS_2 are tied to a gateway entry (=host ip_forward=1 in my representation), gateway entry which has a Monitor IP set.

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My goal would be to possibly redistribute these routes within BGP only and if the Monitored IP is up.
Any hints at enabling this?

Thanks a lot,
Regards