OSPF Network Types - Broadcast

OSPF Network Types - Broadcast

1. Broadcast (Broadcast multi-access network) - Default for Ethernet interfaces.
2. Non-broadcast (Non-Broadcast Multi-Access (NBMA) network) - Exampple is a frame relay network which does not support multicast and broadcast.
3. Point-to-point - Can be configured regardless of the underlying technology (even on Ethernet interfaces).
4. Point-to-multipoint - Useful with frame relay networks that support “pseudo-broadcast”.
5. Point-to-multipoint Non-broadcast - Can be used in frame relay networks where pseudo-broadcast is not supported.

CONFIGURE:
R1:
conf t
interface gi0/1
no shut
ip address 10.10.123.1 255.255.255.0
!
router ospf 1
network 10.10.123.0 0.0.0.255 area 0
end
wr

R2:
conf t
interface gi0/2
no shut
ip address 10.10.123.2 255.255.255.0
!
router ospf 1
network 10.10.123.0 0.0.0.255 area 0
end
wr

R3:
conf t
interface gi0/3
no shut
ip address 10.10.123.3 255.255.255.0
!
router ospf 1
network 10.10.123.0 0.0.0.255 area 0
end
wr

VERIFY:
show ip ospf neighbor
show ip ospf interface !To check the network type.

RERENCES:
Chapter: Configuring OSPF

OSPF Non-Broadcast Network Type over Frame-Relay

OSPF network types

OSPF Network Types – Point-to-Point and Broadcast

#cisco #ccnp #ccie #ospf

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