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Configuring OSPF
1-6 Command Line Interface Protocol Configuration Guide
8.
Define or modify the OSPF interface parameters.
ip ospf authentication-key
password
The password neighboring OSPF routers on a
network segment use for OSPF’s simple password
authentication. Up to 8 bytes of any continuous
string of characters is allowed. All neighboring
routers on the same network must have the same
password to route OSPF traffic.
ip ospf cost cost The cost to send a packet on an OSPF interface.
This is an unsigned integer expressed as the link
state metric. The range is 1 to 65535.
Example OSPF interface costs are:
• T1 (1.544-Mbps serial) - 128
• Ethernet - 10
All routers on the same link must have the same
cost.
ip ospf dead-interval
seconds
Number of seconds hello packets must not have
been seen before its neighbors declare the router
down. This value must be the same on
neighboring routers.
The default is four times the hello interval.
ip ospf hello-interval seconds Number of seconds between the hello packets
sent to the OSPF interface. This value must be the
same on neighboring routers. The default is 10
seconds.
ip ospf message-digest-key
keyid md5 key
Enable OSPF MD5 authentication on an OSPF
interface. By default, this is disabled.
keyid - identifier in the range 1 to 255.
key - alphanumeric password of up to 16 bytes.
ip ospf poll-interval seconds The time interval between hellos sent to an
inactive interface. The default is 120 seconds. The
range is 0 to 3600 seconds.
ip ospf priority priority An 8-bit unsigned integer that represents the
router priority level. The range is 0 to 255. The
default is 1.
A value of 0 indicates an interface cannot be
elected as a designated router (DR) or backup
designated router (BDR).
ip ospf retransmit-interval
seconds
Number of seconds between link state
advertisement retransmissions for adjacencies
belonging to the interface. The default is 5
seconds.
This value must be greater than the expected
round-trip delay between two devices on the
attached network. The range is 1 to 65535
seconds.