H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches Chapter 3 OSPF Configuration
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To do… Use the command… Remarks
Enter system view
system-view
—
Enter interface view
interface interface-type
interface-number
—
Configure a router priority
for the interface
ospf dr-priority priority
Optional
The default router priority
is 1.
 Note:
The DR priority configured with the ospf dr-priority command and the one with the
peer command have the following differences:
z The former is for actual DR election.
z The latter is to indicate whether a neighbor has the election right or not. If you
configure the DR priority for a neighbor as 0, the local router will consider the
neighbor has no election right, and thus no hello packet is sent to this neighbor,
reducing the number of hello packets for DR/BDR election on networks. However, if
the local router is the DR or BDR, it sends hello packets to the neighbor with priority
0 for adjacency establishment.
3.6 Configuring OSPF Route Control
This section covers how to control OSPF routing information advertisement and
reception, and route redistribution from other protocols.
3.6.1 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.
3.6.2 Configuring OSPF Route Summarization
OSPF route summarization includes:
z Configuring route summarization between OSPF areas on an ABR
z Configuring route summarization when redistributing routes into OSPF on an
ASBR
Follow these steps to configure route summarization between OSPF areas on an ABR: