3Com 7700 Configuration Manual page 92

84 C 5: R P
HAPTER OUTING
O
ROTOCOL PERATION
Table 30 Set a Dead Timer for the Neighboring Routers
Operation
Restore the default dead interval of
the neighboring routers
By default, the dead interval for the neighboring routers of P2P or broadcast
interfaces is 40 seconds and for the neighboring routers of P2MP or NBMA
interfaces is 120 seconds.
Note that both hello and dead timers restore the default values if you modify the
network type.
Configure an Interval Required for Sending LSU Packets
Trans-delay seconds should be added to the aging time of the LSA in an LSU
packet. Setting the parameter like this mainly considers the time duration that the
interface requires for transmitting the packet.
You can configure the interval for sending LSU messages. Obviously, more
attention should be paid to this item over low speed network.
Perform the following configuration in VLAN interface view.
Table 31 Configure an Interval for LSU packets
Operation
Configure an interval for
sending LSU packets
Restore the default interval of
sending LSU packets
By default, LSU packets are transmitted by seconds.
Set an Interval for LSA Retransmission Between Neighboring Routers
If a router transmits an LSA to the peer, it requires the acknowledgement packet
from the peer. If it does not receive the acknowledgement packet within the
retransmission, it retransmits this LSA to the neighbor. You can configure the value
of the retransmission interval.
Perform the following configuration in VLAN interface view.
Table 32 Set Retransmit Timer
Operation
Configure the interval of LSA
retransmission for the
neighboring routers
Restore the default LSA
retransmission interval for the
neighboring routers
By default, the interval for neighboring routers to retransmit LSAs is five seconds.
The value of the interval should be bigger than the interval in which a packet can
be transmitted and returned between two routers.
Command
undo ospf timer dead
Command
ospf trans-delay seconds
undo ospf trans-delay
Command
ospf timer retransmit interval
undo ospf timer retransmit