SRX

Is it possible to use the "route-active-on" policy-options feature to check for a static route being reachable, and based on the result stop advertising a different static route?

As an example:

Internal route (static) is 1.1.1.1/24

External route (static to be advertised via BGP) is 3.3.3.3/24

If 1.1.1.1/24 is no longer reachable then 3.3.3.3/24 stops being advertised out.  I've been looking for a method to do this, and without using scripting I haven't found anything.  I feel like I've overlooked something obvious though.

Thank you in advance for any assistance.

So, based off of that document, does this look proper to you?  I've never used condition checks on policies before, though I imagine the examples are rather spot-on.

Check for connectivity to 1.1.1.2 via bfd, remove the route if it goes down

Export 3.3.3.3/24 if 1.1.1.2/24 exists in the routing table

don't export anything if it doesn't exist

set protocols bgp group Public export conditional-export
set routing-options static route 1.1.1.2/24 next-hop 1.1.1.1
set routing-options static route 1.1.1.2/24 bfd-liveness-detection minimum-interval 500
set policy-options policy-statement conditional-export term public_range from route-filter 3.3.3.3/24 exact
set policy-options policy-statement conditional-export term public_range from condition internal_check
set policy-options policy-statement conditional-export term public_range then accept
set policy-options policy-statement conditional-export term otherwise then reject
set policy-options condition internal_check if-route-exists 1.1.1.2/24
set policy-options condition internal_check if-route-exists table inet.0

Thanks once more for all your help.

Yes, It should work as long as you have a BFD session with the next-hop device, you will be able to get a conditional advertisement.

Thanks much!