OSPF over NBMA
RFC standard modes
- Nonbroadcast
=default
=static define neighbour
=DR/BDR
-Point to multipoint
=No BR
=Dynamic
=treat like point to point
Cisco Propretiary modes
-Broadcast
=DR/BDR
=Full connectivity/ Full Mesh
-Point to point
=no DR/BDR
-Point to multicast Non broadcast
=least popular
=static negihbour
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Point to multipoint
R1
router ospf 1
router-id 1.1.1.1
network 170.100.100.1 0.0.0.0 area 0
network 170.100.200.1 0.0.0.0 area 0
network 10.1.19.0 0.0.0.255 area 0
sh ip ospf int
int s0/.1
ip ospf priority 255
router ospf 1
negihbour ip 170.100.100.2
neighbour ip 170.100.100.3
R2
router ospf 1
router-id 2.2.2.2
network 179.100.100.2 0.0.0.0 area 0
network 170.100.2.1 0.0.0.0 area 1
int s0
ip ospf priority 0
R3
int s0/0
ip ospf priority 0
router ospf 1
router-id 3.3.3.3
network 170.100.100.3 0.0.0.0 area 0
network 170.100.3.1 0.0.0.0 area 2
R2
int s0/0
frame map ip 170.100.100.3 201 br
R3
int s0/0
frame map ip 170.100.100.2 301 br
---------------------------------------------------------
Point to Point
R4
router ospf 1
router-id 4.4.4.4
network 170.100.200.2 0.0.0.0 area 0
network 170.100.4.1 0.0.0.0 area 3
R1
router ospf 1
netowrk 170.100.100.1 0.0.0.0 area 0
int s0/0.1
ip ospf network point-to-multipoint
R2
router ospf 1
router-id 2.2.2.2
network 170.100.100.2 0.0.0.0 area 0
int s0
ip ospf network point-to-multipoint
-----------------------------------------------
OSPF sh command
sh ip ospf int
sh ip ospf
sh ip ospf database
int s0/0.1
ip ospf hello-interval 40
ip ospf dead-interval 120
ip ospf retransmit-interval 280
