I just set up a RB450G to accept RIPv2 unicasts so i am able to inject some routes from an external system.
So I set up RIP in passive mode: And enable a neighbor on ether2: Now the system accepts routes and inserts them correctly into the routing table (RIP metric of the injected routes is 1 and they show up with metric 120).

But it also starts sending out the received routes back to the neighbor, with metric 16 (unreachable) which imho basically makes no sense since:
1 - the interface is set to passive so nothing should go out.
2 - it makes no sense to send "unreachable" routes (metric 16)

Using rip/network 192.168.74.0/24 to accept the routes and multicast destination 224.0.0.9 works properly with no invalid routes resent.

Is this a intended behavior in unicast mode or just a bug?