RIPv2 Passive Interface

Using passive interface on RIP only does 1 thing (stop sending RIP updates out of interface) but will not stop advertising the subnetwork on the interface to peer neighbors

Ex On R2 enabling passive interface on S0/0

R2(config)#router rip
R2(config-router)#passive-interface s0/0

If you check on R1 now you'll see that 2.2.2.2 is no longer learnt from R2

R1#sh ip route 2.2.2.2
Routing entry for 2.2.2.2/32
  Known via "rip", distance 120, metric 3
  Redistributing via rip
  Last update from 192.168.13.3 on Serial0/1, 00:00:20 ago
  Routing Descriptor Blocks:
  * 192.168.13.3, from 192.168.13.3, 00:00:20 ago, via Serial0/1   <<<<<<< R3
      Route metric is 3, traffic share count is 1

Ex2:  Enabling passive interface on loopback interface , long ago i used to believe would stop router processor from sending the RIP update about this network but turned out I'm wrong

R2(config)#router rip
R2(config-router)#passive-interface lo0

R4#sh ip route 2.2.2.2
Routing entry for 2.2.2.2/32
  Known via "rip", distance 120, metric 1
  Redistributing via rip
  Last update from 192.168.24.2 on Serial0/1, 00:00:22 ago
  Routing Descriptor Blocks:
  * 192.168.24.2, from 192.168.24.2, 00:00:22 ago, via Serial0/1   <<<<< Still R4 learns about it
      Route metric is 1, traffic share count is 1

So seems to do filtering we can use route-filtering but not passive interface :(