Reference Guide

N8406-023 1Gb Intelligent L3 Switch Browser-based Interface Reference Guide 173
OSPF Area Configuration
To display the following form, go to the OSPF Areas Configuration form. Select an area number, or open the
OSPF Areas folder and click Add OSPF Area.
The following table describes the OSPF Area Configuration controls:
Table 140 OSPF Area Configuration controls
Control
Descriptions
Area number (0-2)
Assigns a numeric identifier for the OSPF area.
Area ID
Defines the area ID of the OSPF area number.
Enabled?
Enables or disables the OSPF area. The default is disabled.
Area Type
Defines the type of area. For example, when a virtual link has to be established with the
backbone, the area type must be defined as transit.
Transit area: allows area summary information to be exchanged between routing
devices. Any area that is not a stub area or NSSA is considered to be transit area.
Stub area: is an area where external routing information is not distributed.
Typically, a stub area is connected to only one other area.
NSSA: Not-So-Stubby Area (NSSA) is similar to stub area with additional
capabilities. For example, routes originating from within the NSSA can be
propagated to adjacent transit and backbone areas. External routes from outside
the Autonomous System (AS) can be advertised within the NSSA but are not
distributed into other areas.
The default is transit.
Stub Area Metric (1-65535)
Configures a stub area to send a numeric metric value. All routes received via that stub
area carry the configured metric to potentially influencing routing decisions.
Metric value assigns the priority for choosing the switch for default route. Metric type
determines the method for influencing routing decisions for external routes. The default
is 1.
SPF Interval (0-255)
Sets time interval between two successive SPF (shortest path first) calculations of the
shortest path tree using the Dijkstra‘s algorithm. The default is 10.
Authentication Type?
Defines the authentication method, as follows:
None: No authentication required.
Password: Authenticates simple passwords so that only trusted routing devices
can participate.
MD5: This parameter is used when MD5 cryptographic authentication is required.
The default is none.