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ip ospf dead-interval
seconds
Set the number of seconds that a device's hello packets must
not have been seen before its neighbors declare the OSPF
router down. This value must be the same for all routers
attached to a common network. The default value is 40
seconds.
ip ospf authentication-key
key
Assign a specific password to be used by neighboring OSPF
routers on a network segment that is using OSPF's simple
password authentication. The key length can be up to 8
characters.
ip ospf message-digest -key
keyed
md5
key
Set an OSPF MD5 authentication key for cryptographic
password. The key length is up to 16 characters.
5.7.5 Configure OSPF Network Type
You have the choice of configuring the OSPF network type as either broadcast or non-broadcast, regardless of the
default media type. They can configure broadcast networks as non-broadcast networks when, for example, there are
routers in the network that do not support multicast addressing. You can also configure the OSPF network type as a
point-to-multipoint network when there is a partially meshed network. Routing between two routers not directly
connected will go through the router that has virtual circuits to both routers. This feature saves you from having to
configure neighbors.
If an OSPF point-to-multipoint interface is not defined in non-broadcast networks, you must configure neighbors on
OSPF network.
To configure the OSPF network type, use the following command in interface configuration mode.
Command Purpose
ip ospf network {broadcast | non-
broadcast | point-to-multipoint | point-
to-point}
Configure the OSPF network type for a specified interface.
5.7.6 Configure OSPF for Non-broadcast Networks
To configure routers that interconnect to non-broadcast networks, perform the following task in router configuration
mode.
Command Purpose
neighbor
ip-address
[
priority
number
]
[
poll-interval
seconds
]
Configure routers interconnecting to non-broadcast networks.
As there might be many routers attached to an OSPF network, a designated router is selected for the network. It is
necessary to use priority and poll-interval parameters in the designated router selection if broadcast capability is not
configured. These parameters need only be configured in those devices that are eligible to become the designated
router or backup designated router.
5.7.7 Configure Area Parameters
You can configure several area parameters including authentication, defining stub areas, and assigning specific costs
to the default route.
