H3C S9500 Series Operation Manual page 258

Operation Manual – Routing Protocol
H3C S9500 Series Routing Switches
Table 4-15 Configure summarization of imported routes by OSPF
Configure summarization of imported
routes by OSPF
Remove summarization of routes
imported into OSPF
By default, summarization of imported routes is disabled.
After the summarization of imported routes is configured, if the local router is an
autonomous system border router (ASBR), this command summarizes the imported
Type-5 LSAs in the summary address range. When NSSA is configured, this command
will also summarize the imported Type-7 LSA in the summary address range.
If the local router works as an area border router (ABR) and a router in the NSSA, this
command summarizes Type-5 LSAs transformed from Type-7 LSAs. If the router is not
the router in the NSSA, the summarization is disabled.
4.2.9 Setting OSPF Route Preference
Since maybe multiple dynamic routing protocols are running on one router concurrently,
the problem of route sharing and selection between various routing protocols occurs.
The system sets a preference for each routing protocol, which will be used in
tie-breaking in case different protocols discover the same route.
Perform the following configuration in OSPF view.
Table 4-16 Set OSPF route preference
Configure
comparing with the other routing protocols
Restore the default protocol preference
By default, the OSPF preference is 10, and that of the imported external routing
protocol is 150.
4.2.10 Configuring OSPF Timers
I. Setting the interval for Hello packet transmission
Hello packets are a kind of most frequently used packets, which are periodically sent to
the adjacent router for discovering and maintaining the adjacency, and for electing DR
and BDR. The user can set the Hello timer.
Operation
Operation
a preference for
4-16
Chapter 4 OSPF Configuration
Command
asbr-summary
[ not-advertise | tag value ]
undo asbr-summary ip-address mask
OSPF for
preference [ ase ] preference
undo preference [ ase ]
ip-address mask
Command