Dell BigIron RX Series, Руководство по настройке

Страница: 775 / 1458

BigIron RX Series Configuration Guide 699
53-1002253-01
Configuring OSPF
25
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
OSPF point-to-point links
In an OSPF point-to-point network, where a direct Layer 3 connection exists between a single pair of
OSPF routers, there is no need for Designated and Backup Designated Routers, as is the case in
OSPF multi-access networks. Without the need for Designated and Backup Designated routers, a
point-to-point network establishes adjacency and converges faster. The neighboring routers
become adjacent whenever they can communicate directly. In contrast, in broadcast and
non-broadcast multi-access (NBMA) networks, the Designated Router and Backup Designated
Router become adjacent to all other routers attached to the network.
NOTE
This feature is supported on Gigabit Ethernet and 10-Gigabit Ethernet interfaces.
NOTE
This feature is supported on physical interfaces. It is not supported on virtual interfaces.
NOTE
Brocade supports numbered point-to-point networks, meaning the OSPF router must have an IP
interface address which uniquely identifies the router over the network. Brocade does not support
unnumbered point-to-point networks.
Configuring an OSPF point-to-point link
To configure an OSPF point-to-point link, enter commands such as the following.
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