Users Guide

ip ospf hello-interval
Sets the time interval between the hello packets sent on the interface.
Syntax
ip ospf hello-interval seconds
Parameters seconds — Enter the hello-interval value in seconds, from 1 to 65535.
Default 10 seconds
Command Mode INTERFACE
Usage Information All routers in a network must have the same hello time interval between the hello packets. The no version of the
this command resets the value to the default.
NOTE: When you configure hello-interval for OSPF, the OSPF dead-interval value is implicitly set
to a value four times greater than the hello-interval value.
Example
OS10(conf-if-vl-10)# ip ospf hello-interval 30
Supported
Releases
10.2.0E or later
ip ospf message-digest-key
Enables OSPF MD5 authentication and sends an OSPF message digest key on the interface.
Syntax
ip ospf message-digest-key keyid md5 key
Parameters
• keyid — Enter an MD5 key ID for the interface, from 1 to 255.
• key — Enter a character string as the password. A maximum of 16 characters.
Defaults Not configured
Command Mode INTERFACE
Usage Information All neighboring routers in the same network must use the same key value to exchange OSPF information. The no
version of this command deletes the authentication key.
Example
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# ip ospf message-digest-key 2 md5 sample12345
Supported
Releases
10.3.0E or later
ip ospf mtu-ignore
Enables OSPF MTU mismatch detection on receipt of DBD packets.
Syntax
ip ospf mtu-ignore
Parameters None
Default Not configured
Command Mode INTERFACE
Usage Information When neighbors exchange DBD packets, the OSPF process checks if the neighbors are using the same MTU on a
common interface. If the receiving MTU in the DBD packet is higher than the IP MTU configured on the incoming
interface, OSPF adjacency does not establish. The no version of this command disables the IP OSPF mtu-ignore
configuration.
Example
OS10(conf-if-vl-10)# ip ospf mtu-ignore
Supported
Releases
10.2.0E or later
626 Layer 3