Tuning and optimizing ospf networks, Configuration prerequisites, Configuring ospf packet timers – H3C Technologies H3C S10500 Series Switches User Manual
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To do…
Use the command…
Remarks
Advertise a host route
host-advertise ip-address cost
Optional
Not advertised by default.
Tuning and optimizing OSPF networks
You can optimize your OSPF network in the following ways:
•
Change OSPF packet timers to adjust the OSPF network convergence speed and network load. On
low-speed links, consider the delay time for sending LSAs.
•
Change the SPF calculation interval to reduce resource consumption caused by frequent network
changes.
•
Configure OSPF authentication to improve security.
•
Configure OSPF network management functions, such as binding OSPF MIB with a process,
sending trap information, and collecting log information.
Configuration prerequisites
Before configuring OSPF network optimization, complete the following tasks:
•
Configure IP addresses for interfaces
•
Configure OSPF basic functions
Configuring OSPF packet timers
You can configure the following timers on OSPF interfaces as needed.
•
Hello timer—Interval for sending hello packets. It must be identical on OSPF neighbors. The longer
the interval, the lower the convergence speed, and the smaller the network load.
•
Poll timer—Interval for sending hello packets to a neighbor that is down on the NBMA network.
•
Dead timer—Interval within which if the interface receives no hello packet from the neighbor, it
declares the neighbor is down.
•
LSA retransmission timer—Interval within which if the interface receives no acknowledgement
packets after sending an LSA to the neighbor, it retransmits 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
—
Specify the hello
interval
ospf timer hello seconds
Optional
The hello interval defaults to 10 seconds on P2P
and broadcast interfaces, and defaults to 30
seconds on P2MP and NBMA interfaces.
Specify the poll interval ospf timer poll seconds
Optional
The poll interval defaults to 120 seconds.