Extreme Networks ExtremeWare XOS Command Spezifikationen PDF herunterladen (Seite 522)

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522 ExtremeWare XOS 10.1 Command Reference Guide

IGP Commands

configure ospf vlan area

configure ospf vlan <vlan-name> area <area-identifier>

Description

Associates a VLAN (router interface) with an OSPF area. By default, all router interfaces are associated

with area 0.0.0.0.

Syntax Description

Default

Area 0.0.0.0

Usage Guidelines

Any OSPF network that contains more than one area is required to have an area configured as area 0,

also called the backbone. All areas in an autonomous system must be connected to the backbone. When

designing networks, you should start with area 0, and then expand into other areas.

The backbone allows summary information to be exchanged between ABRs. Every ABR hears the area

summaries from all other ABRs. The ABR then forms a picture of the distance to all networks outside of

its area by examining the collected advertisements, and adding in the backbone distance to each

advertising router.

When a VLAN is configured to run OSPF, by default you must assign it to an area.

Example

The following command associates the VLAN accounting with an OSPF area:

configure ospf vlan accounting area 0.0.0.6

vlan-name Specifies a VLAN name.

area-identifier Specifies an OSPF area.

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