H3C Technologies H3C S7500E Series Switches - Manual (Page 107)

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To do… Use the command… Remarks
Enter interface view
interface interface-type
interface-number
—
Specify the hello
interval
ospf timer hello seconds
Optional
The hello interval on P2P, Broadcast interfaces
defaults to 10 seconds 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.
Specify the dead
interval
ospf timer dead seconds
Optional
The default dead interval is 40 seconds on P2P,
Broadcast interfaces and 120 seconds on
P2MP and NBMA interfaces.
Specify the
retransmission interval
ospf timer retransmit interval
Optional
The retransmission interval defaults to 5
seconds.
z The hello and dead intervals restore to default values after you change the network type for an
interface.
z The dead interval should be at least four times the hello interval on an interface.
z The poll interval is at least four times the hello interval.
z The retransmission interval should not be so small for avoidance of unnecessary LSA
retransmissions. In general, this value is bigger than the round-trip time of a packet between two
adjacencies.
Specifying an LSA Transmission Delay
Since OSPF packets need time for traveling on links, extending LSA age time with a delay is necessary,
especially for low speed links.
Follow these steps to specify an LSA transmission delay on an interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—