Nortel Networks 40M2420 manual Cfg/l3/ospf/aindex area index, Area Index Configuration

Alteon OS Command Reference

/cfg/l3/ospf/aindex <area index>

Area Index Configuration

[OSPF Area (index) 1 Menu]

areaid	- Set area ID
type	- Set area type
metric	- Set stub area metric
auth	- Set authentication type
spf	- Set time interval between two SPF calculations
enable	- Enable area
disable	- Disable area
delete	- Delete area
cur	- Display current OSPF area configuration

Table 6-73Area Index Configuration Menu Options (/cfg/l3/ospf/aindex)

Command Syntax and Usage

areaid <IP address (such as, 192.4.17.101)>

Defines the IP address of the OSPF area number.

type transitstubnssa

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 exam- ple, 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.

metric <metric value (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.

auth nonepasswordmd5

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.

spf <interval (1-255)>

Sets time interval between two successive SPF (shortest path first) calculations of the shortest path tree using the Dijkstra’s algorithm.

40M2420, April 2007 Chapter 6: The Configuration Menu „ 271