H3C Technologies H3C S7500E Series Switches - Manual (Page 99)

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Configuring the OSPF Network Type for an Interface as P2P
Follow these steps to configure the OSPF network type for an interface as P2P:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Configure the OSPF network
type for the interface as P2P
ospf network-type p2p
Required
By default, the network type of an
interface depends on the link layer
protocol.
Configuring OSPF Route Control
This section covers how to control OSPF routing information advertisement and reception, and route
redistribution from other protocols.
Prerequisites
Before configuring this task, you have configured:
z IP addresses for interfaces
z OSPF basic functions
z Corresponding filters if routing information filtering is needed.
Configuring OSPF Route Summarization
You can configure route summarization on an ABR or ASBR to summarize routes with the same prefix
into a single route and distribute it to other areas.
Route summarization reduces the traffic of routing information exchange between areas and the sizes
of routing tables on routers and thus improves route calculation speed on routers.
Assume in an area are three internal routes 19.1.1.0/24, 19.1.2.0/24, and 19.1.3.0/24. By configuring
route summarization on the ABR, the three routes are summarized into the route 19.1.0.0/16 that is
advertised into other areas.
Configuring route summarization on an ABR
If contiguous network segments are available in the area, you can summarize them into a single
network segment. An ABR generates Type-3 LSAs on a per network segment basis for an attached
non-backbone area.
In this way, the ABR in the area distributes only the summary LSA to reduce the scale of LSDBs on
routers in other areas and the influence of topological changes.
Follow these steps to configure route summarization on an ABR: