Configuring OSPF | Configuring OSPF |
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Configuring Static Neighbors
It is possible to configure neighbors statically on Non Broadcast Multi Access (NBMA),
NBMA requires all routers attached to the network to communicate directly (unicast), and every attached router in this network becomes aware of all of its neighbors through configuration. It also requires a Designated Router (DR) “eligibility” flag to be set for every neighbor.
To set up a router to use NBMA routing, follow the following steps:
1Create an OSPF interface using the CLI command ip ospf interface and perform all the normal config- uration for the interface as with broadcast networks (attaching it to an area, enabling the status, etc.).
2The OSPF interface type for this interface should be set to
ip ospf interface type command. For example, to set interface 1.1.1.1 to be an NBMA interface, enter the following:
-> ip ospf interface 1.1.1.1 type non-broadcast
3Configure static neighbors for every OSPF router in the network using the ip ospf neighbor command. For example, to set an OSPF neighbor with an IP address of 1.1.1.8 to be a static neighbor, enter the following:
-> ip ospf neighbor 1.1.1.8 eligible
The neighbor attaches itself to the right interface by matching the network address of the neighbor and the interface. If the interface has not yet been created, the neighbor gets attached to the interface as and when the interface comes up.
If this neighbor is not required to participate in DR election, configure it as
page | OmniSwitch 6600 Family Advanced Routing Configuration Guide March 2005 |