Installing and Administering Internet Services

352 Chapter8
Configuring gated
Configuring the OSPF Protocol
routers in the network. A sample value for a LAN is 5 seconds.
Default: None (you must specify a value)
Range: 0 - 65535
hellointerval specifies the number of seconds between transmission of
OSPF Hello packets. Smaller intervals ensure that changes in network
topology are detected faster; however, routing traffic can increase. A
sample value for an X.25 network is 30 seconds. A sample value for a
LAN is 10 seconds.
Default: None (you must specify a value)
Range: 0 - 255
NOTE The hellointerval value must be the same for all OSPF routers.
routerdeadinterval specifies the number of seconds that hello packets
are not received from a router before it is considered “down” or “inactive”
by its neighbors. This value should be some multiple of the
hellointerval value.
Default: None (you must specify a value)
Range: 0 - 65535
NOTE The routerdeadinterval value must be the same for all OSPF routers.
A point-to-point interface can be defined with or without a nonbroadcast
clause. If the nonbroadcast clause is specified, then the pollinterval
statement must be defined:
pollinterval specifies a rate at which hellos are sent when a
neighboring router becomes inactive. (A router is considered inactive
when hellos have not been received from the router for the amount of
time specified by the routerdeadinterval definition.) The value of
pollinterval should be larger than the value of hellointerval. A
sample value for an X.25 network is 2 minutes.
Default: None (you must specify a value)
Range: 0 - 255