OSPF中的frame-relay（4） 点到多点广播

hostname R1
!
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface Serial0
 ip address 192.168.1.1 255.255.255.0
 encapsulation frame-relay
 ip ospf network point-to-multipoint
 frame-relay map ip 192.168.1.2 100
 frame-relay map ip 192.168.1.3 200  //这两句在这里可以不用配置，因为点到多点，就像是多个点到点的集合，不像MA一样，存在下一跳不可达的问题
router ospf 1
 network 1.1.1.1 0.0.0.0 area 0
 network 192.168.1.0 0.0.0.255 area 0

R1#sh ip ospf nei

Neighbor ID     Pri   State           Dead Time   Address         Interface
3.3.3.3           0   FULL/  -        0:00:31     192.168.1.3     Serial0
2.2.2.2           0   FULL/  -        0:00:35     192.168.1.2     Serial0    

//因为在点到多点广播型网络中，为直连的网络，不用选举DR跟BDR

R1#show ip route

     1.0.0.0 255.255.255.255 is subnetted, 1 subnets
C       1.1.1.1 is directly connected, Loopback0
     2.0.0.0 255.255.255.255 is subnetted, 1 subnets
O       2.2.2.2 [110/65] via 192.168.1.2, 00:00:50, Serial0
     3.0.0.0 255.255.255.255 is subnetted, 1 subnets
O       3.3.3.3 [110/65] via 192.168.1.3, 00:00:50, Serial0
     192.168.1.0 is variably subnetted, 3 subnets, 2 masks
C       192.168.1.0 255.255.255.0 is directly connected, Serial0
O       192.168.1.3 255.255.255.255
           [110/64] via 192.168.1.3, 00:00:50, Serial0
O       192.168.1.2 255.255.255.255
           [110/64] via 192.168.1.2, 00:00:50, Serial0

 

hostname R2
!
!
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface Serial1
 ip address 192.168.1.2 255.255.255.0
 encapsulation frame-relay
 ip ospf network point-to-multipoint
 frame-relay map ip 192.168.1.1 100 broadcast   //在这里可以不用配置，但是如果要静态配置，必须指定为broadcast，因为是一个点对多点的网络类型
!
router ospf 1
 network 2.2.2.2 0.0.0.0 area 0
 network 192.168.1.0 0.0.0.255 area 0

!
hostname R3
!
!
no ip domain-lookup
!
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
!
interface Serial1
 ip address 192.168.1.3 255.255.255.0
 encapsulation frame-relay
 ip ospf network point-to-multipoint
 frame-relay map ip 192.168.2.1 200 broadcast
!
router ospf 1
 network 3.3.3.3 0.0.0.0 area 0
 network 192.168.1.0 0.0.0.255 area 0

 

 

 

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