3com S7906E Manuel De Montage

 

1-66 

 

The interface state DROther means the interface is not the DR/BDR. 

 

z 

In the following figure, Area 2 has no direct connection to Area 0, and Area 1 acts as the Transit 

Area to connect Area 2 to Area 0 via a configured virtual link between Switch B and Switch C. 

z 

After configuration, Switch B can learn routes to Area 2. 

Figure 1-27 Network diagram for OSPF virtual link configuration 

Swtich A

Vlan-int300

10.1.1.1/24

Swtich B

Switch C

Switch D

Vlan-int300
10.1.1.2/24

Vlan-int100

10.3.1.2/24

Vlan-int100
10.3.1.1/24

Vir

tua

l li

nk

Vlan-int200
10.2.1.1/24

Vlan-int200
10.2.1.2/24

 

 

1)  Configure IP addresses for interfaces (omitted) 

2)  Configure OSPF basic functions 

# Configure Switch A. 

<SwitchA> system-view 

[SwitchA] ospf 1 router-id 1.1.1.1  

[SwitchA-ospf-1] area 0 

[SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255  

[SwitchA-ospf-1-area-0.0.0.0] quit 

# Configure Switch B. 

<SwitchB> system-view 

[SwitchB] ospf 1 router-id 2.2.2.2 

[SwitchB-ospf-1] area 0 

[SwitchB-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 

[SwitchB-ospf-1-area-0.0.0.0] quit 

[SwitchB-ospf-1] area 1 

[SwitchB–ospf-1-area-0.0.0.1] network 10.2.1.0 0.0.0.255 

[SwitchB–ospf-1-area-0.0.0.1] quit 

# Configure Switch C.