RRAS Routing and Remote Access Service (Farsi User Guide)
Resource: Windows 2000 Server Resource kit Internetworking Guide

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Virtual Links
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این مورد زمانی رخ می دهد که یک Area دارای ABR ROUTER  با Backbone Area از نظر فیزیکی در ارتباط نباشد و بخواهد ارتباط برقرار کند توسط یک Area که با Backbone Area در ارتباط

باشد.

In Figure 3.20, Area 0.0.0.3 does not have a router physically connected to the backbone, Area 0.0.0.0. Therefore, a virtual link is configured across the transit area of Area 0.0.0.2 between routers R2 and R3. R2 and R3 are known as virtual link neighbors.

Figure 3.20 OSPF Virtual Link

Configuring Virtual Links
 
 

برای تعریف یک  پیکربندی مانند شکل Figure 3.20 باید در قسمت Virtual Interfaces Tab مانند

 شکل  Transit Area و Virtual Neighbor را تعریف کرد .کلیه تغییرات زیر برروی R2 انجام می شود.

Transit Area

آن Area که نقش واسطه ارتباط بین Area 0 را با آن Area که از نظر فیزیکی  با Backbone Area ارتباط ندارد

را در این قسمت Area ID آن را مشخص می کنید.

Area 0 : Area ID 0.0.0.0  or (Backbone Area)

Virtual Neighbor

در این قسمت باید Router ID موجود  بر روی R3 را مشخص کرد .

To configure a virtual link, configure a virtual interface in the Routing and Remote Access snap-in from the properties of the OSPF routing protocol on each virtual link neighbor with the following:

  • The Area ID of the transit area for the virtual link.
  • The OSPF Router ID of the virtual link neighbor.
  • Adjacency settings such as the Retransmit Interval, Hello Interval, Dead Interval, and Password. The Hello Interval, Dead Interval, and Password must match between the two routers on each side of the virtual link in order for an adjacency to be established. The Retransmit Interval specifies how long the OSPF router waits before retransmitting Link State packets.

Example 1  Virtual Interface Configuration (R2)

 

To view the virtual links

  • In the Routing and Remote Access snap-in, in the IP Routing container, right-click OSPF, and then click Show Virtual Interfaces.

    The Virtual Interfaces window displays all configured virtual interfaces and their state.

Example 2

 
RRAS Routing and Remote Access Service (Farsi User Guide)

LastUpdate:2005/04/05

Winteacher.com > Part2 > RRAS > Step2 > OSPF > Virtual Links