Reference Guide

640 | Open Shortest Path First (OSPFv2 and OSPFv3)
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Use any or all of the following commands in CONFIGURATION INTERFACE mode to change OSPFv2
parameters on the interfaces:
Use the
show config command in CONFIGURATION INTERFACE mode (Figure 29-16) to view interface
configurations. Use the
show ip ospf interface command in EXEC mode to view interface status in the
OSPF process.
Command Syntax Command Mode Usage
ip ospf cost
CONFIG-INTERFACE Change the cost associated with OSPF traffic on
the interface.
Cost: 1 to 65535 (default depends on the
interface speed).
ip ospf dead-interval seconds CONFIG-INTERFACE Change the time interval the router waits before
declaring a neighbor dead. Configure Seconds
range: 1 to 65535. Default: 40 seconds,
The dead interval must be four times the hello interval.
The dead interval must be the same on all routers in the OSPF network.
ip ospf hello-interval seconds CONFIG-INTERFACE Change the time interval between hello-packet
transmission.
Seconds range: from 1 to 65535 (default is 10
seconds).
The hello interval must be the same on all routers in the OSPF network.
ip ospf message-digest-key keyid
md5 key
CONFIG-INTERFACE Use the MD5 algorithm to produce a message
digest/key, which is sent instead of the key.
Keyid range: 1 to 255
Key: a character string
Note: Be sure to write down or otherwise record the key. You cannot learn the
key once it is configured. You must be careful when changing this key.
Note: Users can configure a maximum of six digest keys on an interface. Of the
available six digest keys, the switches select the MD5 key that is common. The
remaining MD5 keys are unused.
ip ospf priority number CONFIG-INTERFACE Change the priority of the interface, which is
used to determine the Designated Router for the
OSPF broadcast network.
Number range: 0 to 255 (the default is 1).
ip ospf retransmit-interval seconds CONFIG-INTERFACE Change the retransmission interval between
LSAs.
Seconds range: 1 to 65535 (default is 5 seconds).
The retransmit interval must be the same on all routers in the OSPF network.
ip ospf transmit-delay seconds CONFIG-INTERFACE Change the wait period between link state
update packets sent out the interface. Seconds
range: 1 to 65535 (default is 1 second).
The transmit delay must be the same on all routers in the OSPF network.