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<-------
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 <---------
Thanks