# OSPF Network Type Non-Broadcast

**URL:** https://forum.networklessons.com/t/ospf-network-type-non-broadcast/58723
**Category:** Lessons Discussion
**Created:** [September 25, 2025, 10:57am UTC](https://forum.networklessons.com/t/ospf-network-type-non-broadcast/58723 "2025-09-25T10:57:49Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![speedosuper111](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/s/a183cd/32.png) [@speedosuper111](https://forum.networklessons.com/u/speedosuper111)
#### Post date: [November 9, 2025, 3:13pm UTC](https://forum.networklessons.com/t/ospf-network-type-non-broadcast/58723/5 "2025-11-09T15:13:11Z")

</div>

The topology is simply three routers R1, R2 and R3 connected to a switch in a multic-access segment.  
R1 has:

```auto
interface FastEthernet0/0
ip address 123.1.1.1 255.255.255.0
ip ospf network non-broadcast
duplex half
!
router ospf 1
router-id 1.1.1.1
network 1.1.1.0 0.0.0.255 area 0
network 123.1.1.0 0.0.0.255 area 0
neighbor 123.1.1.3
neighbor 123.1.1.2

```

R2 has:

```auto
interface FastEthernet0/0
ip address 123.1.1.2 255.255.255.0
ip ospf network non-broadcast
duplex half
!
router ospf 1
router-id 2.2.2.2
network 2.2.2.0 0.0.0.255 area 0
network 123.1.1.0 0.0.0.255 area 0
neighbor 123.1.1.3
neighbor 123.1.1.1

```

and R3 has:

```auto
interface FastEthernet0/0
ip address 123.1.1.3 255.255.255.0
ip ospf network non-broadcast
duplex half
!
router ospf 1
network 3.3.3.0 0.0.0.255 area 0
network 123.1.1.0 0.0.0.255 area 0
neighbor 123.1.1.1
neighbor 123.1.1.2

```

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_[View the full topic](https://forum.networklessons.com/t/ospf-network-type-non-broadcast/58723)._