Setting Ospf Timers - HP HPE FlexNetwork 7500 series Configuration Manual

•
Enable OSPF.

Setting OSPF timers

An OSPF interface includes the following timers:
•
Hello timer—Interval for sending hello packets. It must be identical on OSPF neighbors.
•
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 does not receive any hello packet from the
neighbor, it declares the neighbor is down.
•
LSA retransmission timer—Interval within which if the interface does not receive any
acknowledgment packets after sending an LSA to the neighbor, it retransmits the LSA.
To set OSPF timers:
Step
1. Enter system view.
2. Enter interface view.
3. Set the hello interval.
4. Set the poll interval.
5. Set the dead interval.
6. Set the retransmission
interval.
Command
system-view
interface interface-type
interface-number
ospf timer hello seconds
ospf timer poll seconds
ospf timer dead seconds
ospf timer retransmit interval
85
Remarks
N/A
N/A
By default:
•
The hello interval on P2P and
broadcast interfaces is 10
seconds.
•
The hello interval on P2MP and
NBMA interfaces is 30 seconds.
The default hello interval is restored
when the network type for an interface is
changed.
The default setting is 120 seconds.
The poll interval is a minimum of four
times the hello interval.
By default:
•
The dead interval on P2P and
broadcast interfaces is 40
seconds.
•
The dead interval on P2MP and
NBMA interfaces is 120 seconds.
The dead interval must be a minimum of
four times the hello interval on an
interface.
The default dead interval is restored
when the network type for an interface is
changed.
The default setting is 5 seconds.
A retransmission interval setting that is
too small can cause unnecessary LSA
retransmissions. This interval is typically
set bigger than the round-trip time of a
packet between two neighbors.