3Com SuperStack 4 Configuration Manual page 126

138 C 6: IP R
HAPTER OUTING
P O
ROTOCOL PERATION
Perform the following configuration in Interface View
Table 139 Setting Hello Timer and Poll Interval
Operation
Set the hello interval of the interface
Restore the default hello of the interface
Set the poll interval on the NBMA interface
Restore the default poll interval
By default, P2P and broadcast interfaces send Hello packets every 10 seconds, and
P2MP and NBMA interfaces send Hello packets every 30 seconds.
Setting a Dead Timer for the Neighboring Routers
If hello packets are not received from a neighboring router, that router is
considered dead. The dead timer of neighboring routers refers to the interval after
which a router considers a neighboring router dead. You can set a dead timer for
the neighboring routers.
Perform the following configuration in Interface View:
Table 140 Setting a Dead Timer for the Neighboring Routers
Operation
Configure a dead timer for the neighboring routers
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.
Both hello and dead timers restore to the default values if you modify the network
type.
Configuring an Interval Required for Sending LSU Packets
Trans-delay seconds should be added to the aging time of the LSA in an LSU
packet. This parameter affects the time duration that the interface requires to
transmit the packet.
You can configure the interval for sending LSU messages. This is more important
on low speed networks.
Perform the following configuration in Interface View
Table 141 Configuring an Interval for LSU packets
Operation
Configure an interval for sending LSU packets
Restore the default interval of sending LSU packets
By default, the LSU packets are transmitted every second.
Command
ospf timer hello seconds
undo ospf timer hello
seconds
ospf timer poll
undo ospf timer poll
Command
ospf timer dead
undo ospf timer dead
Command
ospf trans-delay
undo ospf trans-delay
seconds
seconds