3Com S7902E, Configuration Manual

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To do… Use the command… Remarks
Enter OSPF view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
—
Enter area view area area-id
—
Advertise a host route
host-advertise ip-address
cost
Optional
Not advertised by default.
Configuring OSPF Network Optimization
You can optimize your OSPF network in the following ways:
z
Change OSPF packet timers to adjust the OSPF network convergence speed and network load.
On low speed links, you need to consider the delay time for sending LSAs on interfaces.
z
Change the interval for SPF calculation to reduce resource consumption caused by frequent
network changes.
z
Configure OSPF authentication to meet high security requirements of some mission-critical
networks.
z
Configure OSPF network management functions, such as binding OSPF MIB with a process,
sending trap information and collecting log information.
Prerequisites
Before configuring OSPF network optimization, you have configured:
z
IP addresses for interfaces;
z
OSPF basic functions.
Configuring OSPF Packet Timers
You can configure the following timers on OSPF interfaces as needed:
z
Hello timer: Interval for sending hello packets. It must be identical on OSPF neighbors. The longer
the interval, the lower convergence speed and smaller network load.
z
Poll timer: Interval for sending hello packets to the neighbor that is down on the NBMA network.
z
Dead timer: Interval within which if the interface receives no hello packet from the neighbor, it
declares the neighbor is down.
z
LSA retransmission timer: Interval within which if the interface receives no acknowledgement
packets after sending a LSA to the neighbor, it will retransmit the LSA.
Follow these steps to configure timers for OSPF packets:
To do… Use the command… Remarks
Enter system view system-view
—
Enter interface view
interface interface-type
interface-number
—