H3C Technologies H3C S10500 Series Switches - Manual (Page 110)

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Configuring OSPF to give priority to receiving and processing
hello packets
To ensure OSPF runs properly, a router receives and processes hello packets and other protocol packets
at the same time. When the router has established neighbor relationships with multiple routers, and the
routing table size is big, the router must receive and process large numbers of packets. In this case, you
can configure OSPF to give priority to receiving and processing hello packets to ensure stable neighbor
relationships.
Follow these steps to configure OSPF to give priority to receiving and processing hello packets:
To do… Use the command… Remarks
Enter system view system-view —
Configure OSPF to give
priority to receiving and
processing hello packets
ospf packet-process prioritized-treatment
Required
Not configured by default.
Configuring the LSU transmit rate
Sending large numbers of LSU packets affects router performance and consumes too much network
bandwidth. You can configure the router to send LSU packets at a proper interval and limit the maximum
number of LSU packets sent out of an OSPF interface each time.
Follow these steps to configure the LSU transmit rate:
To do… Use the command… Remarks
Enter system view system-view —
Enter OSPF view
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
—
Configure the LSU
transmit rate
transmit-pacing interval interval count count
Optional
By default, an OSPF interface
sends up to three LSU packets
every 20 milliseconds.
Enabling OSPF ISPF
When a network topology is changed, Incremental Shortest Path First (ISPF) allows the system to
recomputes only the affected part of the shortest path tree (SPT), instead of the entire SPT.
Follow these steps to enable OSPF ISPF:
To do… Use the command… Remarks
Enter system view system-view —
Enter OSPF view
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
—
Enable OSPF ISPF ispf enable
Optional
Disabled by default.