IP Routing Features
Configuring OSPF
Assigning VLANs to an Area
Once you define OSPF areas, you can assign VLANs to the areas. All VLANs
in the switch must be assigned to one of the defined areas on an OSPF router.
When a VLAN is assigned to an area, the primary IP address is automatically
included in the assignment. To include secondary addresses, you must enable
OSPF on them separately, or use the “all” option in the assignment.
Example: To assign VLAN 8 of Switch A to area 192.5.0.0 and then save the
changes, enter the following commands:
HPSwitch(ospf)# vlan 8
RouterA(vlan-8)# ip ospf area 192.5.0.0
RouterA(vlan-8)# write memory
Modifying Interface Defaults
OSPF has interface parameters that you can configure. For simplicity, each of
these parameters has a default value. No change to these default values is
required except as needed for specific network configurations.
VLAN default values can be modified using the following CLI commands at
the VLAN interface level of the CLI:
■ ip ospf area < ip-addr >
■ ip ospf authentication-key < password >
■ ip ospf md5-auth-key-chain < chain-name-str >
■ ip ospf cost < num >
■ ip ospf dead-interval < value >
■ ip ospf hello-interval < value >
■ ip ospf priority < value >
■ ip ospf retransmit-interval < value >
■ ip ospf transmit-delay < value >
For a complete description of these parameters, see the summary of OSPF
interface parameters in the next section.
OSPF Interface Parameters
The following parameters apply to OSPF interfaces.
Area: Assigns an interface to a specific area. You can assign either an IP
address or number to represent an OSPF Area ID. If you assign a number, it
can be any value from 0 – 4,294,967,295.
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