System information

Configuring OSPF
11-19
Configuring General OSPF Interface Parameters
You can change certain interface-specific OSPF parameters using the ip ospf
hello-interval, ip ospf dead-interval, and ip ospf authentication-key commands. If
you change these parameters, ensure that the configurations for all routers on your
network have compatible values. You can change the parameters shown in Table 11-1:
1. To specify the cost of sending a packet on an OSPF interface, use the ip ospf cost
command in Interface Configuration mode, as shown below:
MOT(config-if)#ip ospf cost <n>
Table 11-1 OSPF Parameters
Parameter Description Default Values
cost Metric value for sending a
packet on an OSPF
interface; the higher the
bandwidth, the lower the
cost
10
8
/
bandwidth
1 to 65535
retransmit-interval Time interval between
LSA retransmissions
5 seconds 1 to 65535
seconds
transmit-delay Time interval for LSA
retransmissions
1second 1 to 65535
seconds
priority Value used to determine
OSPF designated router
1seconds 0 to 255
seconds
hello-interval Time interval between
hello packets
10 seconds 1 to 65535
seconds
dead-interval Time interval between
router hello packets after
which neighboring
routers consider the
router down
40 seconds 1 to 65535
seconds
authentication-key Password for use by
neighboring OSPF
routers that use OSPF
simple password
authentication
None Character
string up to
8 bytes
message-digest-key Key enabling OSPF MD5
authentication
disabled enabled or
disabled