Dell Brocade DCX, Configuration Manual, Page: 768 / 1436

696 BigIron RX Series Configuration Guide
53-1001810-01
Configuring OSPF
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You configure NBMAs on an interface. The routers at the other end of that interface must have a
non-broadcast neighbor configured. There is no restriction on the number of routers sharing a
non-broadcast interface (for example, through a hub or switch).
To configure NBMA on an interface, do the following.
1. Create an OSPF area on an interface, then enable NBMA on that interface.
BigIron RX(config)# int ve 20
BigIron RX(config-vif-20)# ip ospf area 0
BigIron RX(config-vif-20)# ip ospf network non-broadcast
BigIron RX(config-vif-20)# exit
Syntax: [no] ip ospf network non-broadcast
2. Then under the router OSPF level, specify the IP address of the neighbor in the OSPF
configuration. The non-broadcast interface configuration must be done on the OSPF routers on
both ends of the link.
For example, the following commands configure VE 20 as a non-broadcast interface.
The following commands specify 1.1.20.1 as an OSPF neighbor address. The address specified
must be in the same sub-net as a non-broadcast interface.
BigIron RX(config)# router ospf
BigIron RX(config-ospf-router)# neighbor 1.1.20.1
Syntax: neighbor <ip-address>
For example, to configure the feature in a network with three routers connected by a hub or switch,
each router must have the linking interface configured as a non-broadcast interface, and both of
the other routers must be specified as neighbors.
The output of the show ip ospf interface command has been enhanced to display information
about non-broadcast interfaces and neighbors that are configured in the same sub-net.
For example.
In the Type field, “non-broadcast” indicates that this is a non-broadcast interface. When the
interface type is non-broadcast, the Non-broadcast neighbor config field displays the neighbors
that are configured in the same sub-net. If no neighbors are configured in the same sub-net, a
message such as the following is displayed.
***Warning! no non-broadcast neighbor config in 1.1.100.1 255.255.255.0
BigIron RX# show ip ospf interface
v20,OSPF enabled
IP Address 1.1.20.4, Area 0
OSPF state BD, Pri 1, Cost 1, Options 2, Type nbma Events 6
Timers(sec): Transit 1, Retrans 5, Hello 10, Dead 40
DR: Router ID 1.1.13.1 Interface Address 1.1.20.5
BDR: Router ID 2.2.2.1 Interface Address 1.1.20.4
Neighbor Count = 1, Adjacent Neighbor Count= 2
Non-broadcast neighbor config: 1.1.20.1, 1.1.20.2, 1.1.20.3, 1.1.20.5,
Neighbor: 1.1.20.5
Authentication-Key:None
MD5 Authentication: Key None, Key-Id None, Auth-change-wait-time 300