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OSPF Commands

XSR CLI Reference Guide 5-89

Thenoformofthiscommandremovesthevirtuallink:

no area area-id virtual-link router-id [authentication [message-digest | null]]

[hello-interval seconds] [retransmit-interval seconds] [transmit-delay seconds]

[dead-interval seconds] [authentication-key key | message-digest-key keyid md5

key]

Mode

Routerconfiguration:XSR(config-router)#

Defaults

•hello‐intervalseconds:10seconds

•retransmit‐intervalseconds:5seconds

•transmit‐delayseconds:1second

•dead‐intervalseconds:40seconds

• authentication‐keykey:Nodefault

•message‐digest‐keykeyidmd5key:Nodefault

Example

Thefollowingexample,asillu stratedinFigure 5‐1,showsthevirtuallinkconfigurationfortwo

ABRs.ABR1physicallyinterfacesarea2tothebackbone(area0.0.0.0).ABR2physicallyinterfaces

area3toarea2.AvirtuallinkiscreatedbetweenthetwoABRsbymeansofarea2,whichbecomes

thetransitarea.TheRouterIDforABR1is192.168.33.1.TheRouterIDforABR2is192.168.33.2.

OnABR1enterthefollowingcommands:

XSR(config)#interface fastethernet 1

XSR(config-if<F1>)#ip address 172.16.150.1 255.255.255.0

XSR(config)#interface serial 1/0

XSR(config-if<S1/0>)#ip address 192.16.33.1 255.255.255.0

XSR(config)#router ospf 1

XSR(config-router)#network 172.16.150.0 0.0.0.255 area 0.0.0.0

XSR(config-router)#network 192.16.33.0 0.0.0.255 area 2

XSR(config-router)#area 2 virtual-link 192.16.33.2

OnABR2enterthefollowingcommands:

XSR(config)#interface fastethernet 1

XSR(config-if<F1>)#ip address 172.15.0.1 255.255.0.0

XSR(config)#interface serial 1/1

XSR(config-if<S1/1)#ip address 192.16.33.2 255.255.255.0

XSR(config)#router ospf 1

XSR(config-router)#network 172.15.0.1 0.0.0.0 area 3

XSR(config-router)#network 192.16.33.0 0.0.0.255 area 2

XSR(config-router)#area 2 virtual-link 192.16.33.1

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