Typical Configuration Of Single-area OSPF on AR28、AR46 Series Routers

Typical Configuration Of Single-area OSPF on AR28、AR46 Series Routers

[Requirements]

The network segments where two PCs are located are interconnected through two routers running OSPF.

[Networking diagram]

[Configuration script 1]

Configuration script on Router A

# sysname RouterA # router id 1.1.1.1      /Configure the router ID to be the same as loopback 0/ # radius scheme system # domain system # interface Ethernet0/0 ip address 10.1.1.1 255.255.255.0 # interface Serial0/0 link-protocol ppp ip address 20.1.1.1 255.255.255.252 # interface NULL0 # interface LoopBack0 ip address 1.1.1.1 255.255.255.255 # ospf 1                           /Enable the OSPF/ area 0.0.0.0                     /Create area 0/ network 1.1.1.1 0.0.0.0          /Enable the OSPF on loop 0/ network 10.1.1.0 0.0.0.255       /Enable the OSPF on E0/0/ network 20.1.1.0 0.0.0.3         /Enable the OSPF on S0/0/ # user-interface con 0 user-interface vty 0 4 # return

Configuration script on Router B

# sysname RouterB # router id 1.1.1.2      /Configure the router ID to be the same as loopback 0/ # radius scheme system # domain system # interface Ethernet0/0 ip address 30.1.1.1 255.255.255.0 # interface Serial0/0 link-protocol ppp ip address 20.1.1.2 255.255.255.252 # interface NULL0 # interface LoopBack0 ip address 1.1.1.2 255.255.255.255 # ospf 1                       /Enable the OSPF/ area 0.0.0.0                 /Create area 0/ network 1.1.1.2 0.0.0.0      /Enable the OSPF on loop 0/ network 20.1.1.0 0.0.0.3     /Enable the OSPF on S0/0/ network 30.1.1.0 0.0.0.255   /Enable the OSPF on E0/0/ # user-interface con 0 user-interface vty 0 4 # return

 

[Verification]

Router A and Router B can learn the routes from each other through OSPF, and their network segments can be pinged mutually.

Routing table of Router A:

[RouterA]disp ip routing-table

 Routing Table: public net

Destination/Mask   Protocol Pre  Cost        Nexthop         Interface         

1.1.1.1/32         DIRECT   0    0           127.0.0.1       InLoopBack0    

1.1.1.2/32         OSPF     10   1563        20.1.1.2        Serial0/0       

10.1.1.0/24        DIRECT   0    0           10.1.1.1        Ethernet0/0    

10.1.1.1/32        DIRECT   0    0           127.0.0.1       InLoopBack0     

20.1.1.0/30        DIRECT   0    0           20.1.1.1        Serial0/0       

20.1.1.1/32        DIRECT   0    0           127.0.0.1       InLoopBack0     

20.1.1.2/32        DIRECT   0    0           20.1.1.2        Serial0/0       

30.1.1.0/24        OSPF     10   1563        20.1.1.2        Serial0/0       

127.0.0.0/8        DIRECT   0    0           127.0.0.1       InLoopBack0     

127.0.0.1/32       DIRECT   0    0           127.0.0.1       InLoopB

 

[Configuration script 2]

Configuration script on Router A

# sysname RouterA # router id 1.1.1.1      /Configure the router ID to be the same as loopback 0/ # radius scheme system # domain system # interface Ethernet0/0 ip address 10.1.1.1 255.255.255.0 # interface Serial0/0 link-protocol ppp ip address 20.1.1.1 255.255.255.252 # interface NULL0 # interface LoopBack0 ip address 1.1.1.1 255.255.255.255 # ospf 1                           /Enable the OSPF/ area 0.0.0.0                     /Create area 0/ network 1.1.1.1 0.0.0.0          /Enable the OSPF on loop 0/ network 10.1.1.0 0.0.0.255       /Enable the OSPF on E0/0/ network 20.1.1.0 0.0.0.3         /Enable the OSPF on S0/0/ # user-interface con 0 user-interface vty 0 4 # return

Configuration script on Router B

# sysname RouterB # router id 1.1.1.2      /Configure the router ID to be the same as loopback 0/ # radius scheme system # domain system # interface Ethernet1/0/0 ip address 30.1.1.1 255.255.255.0 # interface Serial2/0/0 link-protocol ppp ip address 20.1.1.2 255.255.255.252 # interface NULL0 # interface LoopBack0 ip address 1.1.1.2 255.255.255.255 # ospf 1                      /Enable the OSPF/ import-route direct         /Import the direct route for the interface/ area 0.0.0.0                /Create area 0/ network 1.1.1.2 0.0.0.0     /Enable the OSPF on loop 0/ network 20.1.1.0 0.0.0.3    /Enable the OSPF on S0/0/ # user-interface con 0 user-interface vty 0 4 # return

[Verification]

Router A and Router B can learn the routes from each other through OSPF, and their network segments can be pinged mutually.

Routing table of Router A:

[RouterA]disp ip routing-table                                    

 Routing Table: public net                                               

Destination/Mask   Protocol Pre  Cost        Nexthop         Interface       

1.1.1.1/32         DIRECT   0    0           127.0.0.1       InLoopBack0     

1.1.1.2/32         OSPF     10   1563        20.1.1.2        Serial0/0       

10.1.1.0/24        DIRECT   0    0           10.1.1.1        Ethernet0/0     

10.1.1.1/32        DIRECT   0    0           127.0.0.1       InLoopBack0     

20.1.1.0/30        DIRECT   0    0           20.1.1.1        Serial0/0       

20.1.1.1/32        DIRECT   0    0           127.0.0.1       InLoopBack0     

20.1.1.2/32        DIRECT   0    0           20.1.1.2        Serial0/0       

30.1.1.0/24        O_ASE   150    1           20.1.1.2        Serial0/0       

127.0.0.0/8        DIRECT   0    0           127.0.0.1       InLoopBack0     

127.0.0.1/32       DIRECT   0    0           127.0.0.1       InLoopBack0

[Tip]

1. It is recommended to specify the router ID to be the same as loopback 0 address.

2. Wildcard bits are needed on the network.

3. Method 1 and method 2 differ in the advertising method of Ethernet interface address.

Method 1 advertises routes by running OSPF on the Ethernet; method 2 advertises routes by importing the direct interface.

4. Configuration principle of OSPF network type

The default network type of Quidway routers is as follows:

 

Type	Link layer protocol
p2p	PPP and loopback
NBMA	Fr, x25 and HDLC
p2mp	None
broadcast	Ethernet

 

5. Two interconnected routers must have the same network type.

6. Because adjacent routers cannot be discovered by broadcasting Hello packets on the NBMA network, it is mandatory to manually specify an IP address for the adjacent router:

[Quidway-ospf-1]peer 20.1.1.2