Troubleshooting OSPF Neighbor Adjacency

Fabian_Martinez1 · July 30, 2016, 12:46am

Hello,

I have a question regarding passive interfaces. From my understanding a “passive interface” under OSPF doesn’t send hello packets and makes adjacencies. I have the following config up on a router and would like clarification:

Routing Protocol is "ospf 250"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Router ID 10.16.1.1
  Number of areas in this router is 1. 1 normal 0 stub 0 nssa
  Maximum path: 4
  Routing for Networks:
    10.0.0.0 0.255.255.255 area 28
  Passive Interface(s):
    Embedded-Service-Engine0/0
    GigabitEthernet0/2
    GigabitEthernet0/2.701
    Backplane-GigabitEthernet0/3
    GigabitEthernet0/0/0
    Serial0/3/0

CORVG01#sh ip ospf interface brief 
Interface    PID   Area            IP Address/Mask    Cost  State Nbrs F/C
Lo0          250   28              10.16.1.1/29       1     LOOP  0/0
SM1/0        250   28              Unnumbered Gi0/2.701 1     DOWN  0/0
Se0/3/0      250   28              10.160.9.2/30      64    DOWN  0/0
Gi0/2.701    250   28              10.0.8.250/24      1     DR    0/0&lt;-------
Gi0/1        250   28              10.16.1.10/31      1     P2P   1/1
Gi0/0        250   28              10.16.1.8/31       1     P2P   1/1

my question is why are we still seeing Gi0/2.701 as on OSPF interface? is it because Interface Gi0/2.701 has an ip address that falls under the network 10.0.0.0 0.255.255.255 area 28 command?

router ospf 250
 router-id 10.16.1.1
 passive-interface default
 no passive-interface GigabitEthernet0/0
 no passive-interface GigabitEthernet0/1
 network 10.0.0.0 0.255.255.255 area 28 &lt;---------

Thanks