Configuring Ospf Route Control - 3Com Switch 4800G 24-Port Configuration Manual

Configuring OSPF
Route Control
Prerequisites
Configuring OSPF Route
Summarization
To do...
Enter system view
Enter interface view
Configure a router priority for
the interface
n
The DR priority configured with the ospf dr-priority command and the one with
the peer command have the following differences
The former is for actual DR election.
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The latter is to indicate whether a neighbor has the election right or not. If you
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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.
This section covers how to control OSPF routing information advertisement and
reception, and route redistribution from other protocols.
Before configuring this task, you have configured:
IP addresses for interfaces
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OSPF basic functions
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Corresponding filters if routing information filtering is needed.
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OSPF route summarization includes:
Configuring route summarization between OSPF areas on an ABR
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Configuring route summarization when redistributing routes into OSPF on an
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ASBR
Follow these steps to configure route summarization between OSPF areas on an
ABR:
To do...
Enter system view
Enter OSPF view
Enter OSPF area view
Configure ABR route
summarization
Follow these steps to configure route summarization when redistributing routes
into OSPF on an ASBR:

Configuring OSPF Route Control

Use the command...
system-view
interface interface-type
interface-number
ospf dr-priority priority
Use the command...
system-view
ospf [ process-id | router-id
router-id ] *
area area-id
abr-summary ip-address { mask |
mask-length } [ advertise |
not-advertise ] [ cost cost ]
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Remarks
-
-
Optional
The default router priority is 1.
Remarks
-
-
Required
Required
Available on an ABR only
Not configured by default