Brocade Network OS NETCONF Operations Guide v4.1.1 Manual do Utilizador descarregar pdf (Página 562)

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Performing basic OSPF configuration

<database-filter>

<all-out/>

</database-filter>

Assigning virtual links

All ABRs must have either a direct or indirect link to the OSPF backbone area (0.0.0.0 or 0). If an

ABR does not have a physical link to the area backbone, the ABR can configure a virtual link to

another router within the same area, which has a physical connection to the backbone area. Refer

to the Network OS Administrator’s Guide for details.

Figure shows an OSPF area border router, Device A, that is cut off from the backbone area (area

0). To provide backbone access to Device A, you can add a virtual link between Device A and Device

C using area 1 as a transit area. To configure the virtual link, you define the link on the router that

is at each end of the link. No configuration for the virtual link is required on the routers in the

transit area.

FIGURE 7 Defining OSPF virtual links within a network

To define the virtual link on Device A, establish a NETCONF session with Device A, and issue the

following <edit-config> RPC. The RPC configures both areas in which the router participates (area 2

and area 1). For the transition area (area 1), the <area> node element also includes the

<virt-link-neighbor> element, which specifies the router address of the ABR that connects the

transition area to the backbone area.

<edit-config>

OSPF Area 0

OSPF Area 1

“transit area”

OSPF Area 2

Device C

Router ID 209.157.22.1

Device B

Device A

Router ID 10.0.0.1

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