Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 207)

Brocade ICX 6650 Layer 3 Routing Configuration Guide 189
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Configuring OSPF
Example of specifying OSPF neighbor address
Brocade#show ip ospf interface
v20,OSPF enabled
IP Address 10.1.20.4, Area 0
OSPF state BD, Pri 1, Cost 1, Options 2, Type non-broadcast Events 6
Timers(sec): Transit 1, Retrans 5, Hello 10, Dead 40
DR: Router ID 10.1.13.1 Interface Address 10.1.20.5
BDR: Router ID 10.2.2.1 Interface Address 10.1.20.4
Neighbor Count = 1, Adjacent Neighbor Count= 2
Non-broadcast neighbor config: 10.1.20.1, 10.1.20.2, 10.1.20.3, 10.1.20.5,
Neighbor: 10.1.20.5
Authentication-Key:None
MD5 Authentication: Key None, Key-Id None, Auth-change-wait-time 300
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 subnet. If no neighbors are configured in the same subnet, a
message such as the following is displayed.
***Warning! no non-broadcast neighbor config in 10.1.100.1 255.255.255.0
Assigning virtual links
All ABRs (area border routers) must have either a direct or indirect link to the OSPF backbone area
(0.0.0.0 or 0). If an ABR does not have a physical link to the area backbone, the ABR can configure
a virtual link to another router within the same area, which has a physical connection to the area
backbone.
The path for a virtual link is through an area shared by the neighbor ABR (router with a physical
backbone connection), and the ABR requiring a logical connection to the backbone.
Two parameters fields must be defined for all virtual links—transit area ID and neighbor router:
• The transit area ID represents the shared area of the two ABRs and serves as the connection
point between the two routers. This number should match the area ID value.
• The neighbor router field is the router ID (IP address) of the router that is physically connected
to the backbone, when assigned from the router interface requiring a logical connection.
When assigning the parameters from the router with the physical connection, the router ID is
the IP address of the router requiring a logical connection to the backbone.
NOTE
By default, the Brocade router ID is the IP address configured on the lowest numbered loopback
interface. If the Layer 3 Switch does not have a loopback interface, the default router ID is the lowest
numbered IP address configured on the device. For more information or to change the router ID,
refer to
“Changing the router ID” on page 31.
NOTE
When you establish an area virtual link, you must configure it on both of the routers (both ends of
the virtual link).