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NBMA实验
实验准备：
1、 四台路由器，R2配置成帧中继交换机。
2、 R1，R3，R4运行OSPF。
1、 四台路由器，R2配置成帧中继交换机。
2、 R1，R3，R4运行OSPF。
实验配置：
R1：
interface Loopback0
ip address 1.1.1.1 255.255.255.0
ip ospf network point-to-point 使路由正常。
interface Serial0/0
ip address 134.1.1.1 255.255.255.0
encapsulation frame-relay 封装成帧中继。
ip ospf network non-broadcast 配置成NBMA的网络。
ip ospf priority 255 使R1成为DR。接口悠闲级。
frame-relay map ip 134.1.1.3 103 broadcast 用广播方式发送帧中继信息。静态映射。（注意：对方IP和己方DLCI）
frame-relay map ip 134.1.1.4 104 broadcast
no frame-relay inverse-arp 关闭自动映射。
router ospf 1
log-adjacency-changes
network 1.1.1.0 0.0.0.255 area 0
network 134.1.1.0 0.0.0.255 area 0
neighbor 134.1.1.3 priority 3 在NBMA的网络中，只能使用neighbor来指明邻居还可以指明邻居的优先级。
neighbor 134.1.1.4
R1：
interface Loopback0
ip address 1.1.1.1 255.255.255.0
ip ospf network point-to-point 使路由正常。
interface Serial0/0
ip address 134.1.1.1 255.255.255.0
encapsulation frame-relay 封装成帧中继。
ip ospf network non-broadcast 配置成NBMA的网络。
ip ospf priority 255 使R1成为DR。接口悠闲级。
frame-relay map ip 134.1.1.3 103 broadcast 用广播方式发送帧中继信息。静态映射。（注意：对方IP和己方DLCI）
frame-relay map ip 134.1.1.4 104 broadcast
no frame-relay inverse-arp 关闭自动映射。
router ospf 1
log-adjacency-changes
network 1.1.1.0 0.0.0.255 area 0
network 134.1.1.0 0.0.0.255 area 0
neighbor 134.1.1.3 priority 3 在NBMA的网络中，只能使用neighbor来指明邻居还可以指明邻居的优先级。
neighbor 134.1.1.4
SWITCH：
frame-relay switching 配置成帧中继交换机。此命令很重要。
interface Serial0/0
no ip address
encapsulation frame-relay 封装成帧中继
clockrate 128000
frame-relay lmi-type cisco 配置帧中继的类型
frame-relay intf-type dce 配置帧中继为DCE
frame-relay route 103 interface Serial0/1 301 做帧中继映射
frame-relay route 104 interface Serial0/2 401
interface Serial0/1
no ip address
encapsulation frame-relay
clockrate 128000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 301 interface Serial0/0 103
interface Serial0/2
no ip address
encapsulation frame-relay
clockrate 128000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 401 interface Serial0/0 104
frame-relay switching 配置成帧中继交换机。此命令很重要。
interface Serial0/0
no ip address
encapsulation frame-relay 封装成帧中继
clockrate 128000
frame-relay lmi-type cisco 配置帧中继的类型
frame-relay intf-type dce 配置帧中继为DCE
frame-relay route 103 interface Serial0/1 301 做帧中继映射
frame-relay route 104 interface Serial0/2 401
interface Serial0/1
no ip address
encapsulation frame-relay
clockrate 128000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 301 interface Serial0/0 103
interface Serial0/2
no ip address
encapsulation frame-relay
clockrate 128000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 401 interface Serial0/0 104
R3：
interface Loopback0
ip address 3.3.3.3 255.255.255.0
ip ospf network point-to-point
interface Serial0/1
ip address 134.1.1.3 255.255.255.0
encapsulation frame-relay
ip ospf network non-broadcast
ip ospf priority 3
frame-relay map ip 134.1.1.1 301 broadcast
frame-relay map ip 134.1.1.4 301 broadcast
no frame-relay inverse-arp
router ospf 1
log-adjacency-changes
network 3.3.3.0 0.0.0.255 area 0
network 134.1.1.0 0.0.0.255 area 0
interface Loopback0
ip address 3.3.3.3 255.255.255.0
ip ospf network point-to-point
interface Serial0/1
ip address 134.1.1.3 255.255.255.0
encapsulation frame-relay
ip ospf network non-broadcast
ip ospf priority 3
frame-relay map ip 134.1.1.1 301 broadcast
frame-relay map ip 134.1.1.4 301 broadcast
no frame-relay inverse-arp
router ospf 1
log-adjacency-changes
network 3.3.3.0 0.0.0.255 area 0
network 134.1.1.0 0.0.0.255 area 0
R4：
interface Loopback0
ip address 4.4.4.4 255.255.255.0
ip ospf network point-to-point
interface Serial0/1
ip address 134.1.1.4 255.255.255.0
encapsulation frame-relay
ip ospf network non-broadcast
ip ospf priority 0
frame-relay map ip 134.1.1.1 401 broadcast
frame-relay map ip 134.1.1.3 401 broadcast
no frame-relay inverse-arp
router ospf 1
log-adjacency-changes
network 4.4.4.0 0.0.0.255 area 0
network 134.1.1.0 0.0.0.255 area 0
interface Loopback0
ip address 4.4.4.4 255.255.255.0
ip ospf network point-to-point
interface Serial0/1
ip address 134.1.1.4 255.255.255.0
encapsulation frame-relay
ip ospf network non-broadcast
ip ospf priority 0
frame-relay map ip 134.1.1.1 401 broadcast
frame-relay map ip 134.1.1.3 401 broadcast
no frame-relay inverse-arp
router ospf 1
log-adjacency-changes
network 4.4.4.0 0.0.0.255 area 0
network 134.1.1.0 0.0.0.255 area 0
实验结果：
R1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
3.3.3.3 3 FULL/BDR 00:01:31 134.1.1.3 Serial0/0
4.4.4.4 0 FULL/DROTHER 00:01:57 134.1.1.4 Serial0/0
R1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
3.3.3.3 3 FULL/BDR 00:01:31 134.1.1.3 Serial0/0
4.4.4.4 0 FULL/DROTHER 00:01:57 134.1.1.4 Serial0/0
R1#show ip route ospf
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0 [110/782] via 134.1.1.3, 00:11:56, Serial0/0
4.0.0.0/24 is subnetted, 1 subnets
O 4.4.4.0 [110/782] via 134.1.1.4, 00:11:56, Serial0/0
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0 [110/782] via 134.1.1.3, 00:11:56, Serial0/0
4.0.0.0/24 is subnetted, 1 subnets
O 4.4.4.0 [110/782] via 134.1.1.4, 00:11:56, Serial0/0
R3：frame-relay map ip 134.1.1.4 301 broadcast
R4：frame-relay map ip 134.1.1.3 401 broadcast
以上两条命令的说明：
如果你加这两条命令，在R3上和R4上都能看见带O的路由，如：
R3#show ip route ospf
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/782] via 134.1.1.1, 00:00:16, Serial0/1
4.0.0.0/24 is subnetted, 1 subnets
O 4.4.4.0 [110/782] via 134.1.1.4, 00:00:16, Serial0/1
R3#ping 4.4.4.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
…..
Success rate is 0 percent (0/5)
R4：frame-relay map ip 134.1.1.3 401 broadcast
以上两条命令的说明：
如果你加这两条命令，在R3上和R4上都能看见带O的路由，如：
R3#show ip route ospf
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/782] via 134.1.1.1, 00:00:16, Serial0/1
4.0.0.0/24 is subnetted, 1 subnets
O 4.4.4.0 [110/782] via 134.1.1.4, 00:00:16, Serial0/1
R3#ping 4.4.4.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
…..
Success rate is 0 percent (0/5)
R4#show ip route ospf
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/782] via 134.1.1.1, 00:00:35, Serial0/1
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0 [110/782] via 134.1.1.3, 00:00:35, Serial0/1
R4#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
…..
Success rate is 0 percent (0/5)
说明即使有路由，但是没有帧中继映射还是不能够通信。
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/782] via 134.1.1.1, 00:00:35, Serial0/1
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0 [110/782] via 134.1.1.3, 00:00:35, Serial0/1
R4#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
…..
Success rate is 0 percent (0/5)
说明即使有路由，但是没有帧中继映射还是不能够通信。
加上这两条命令后：
R3#show ip route ospf
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/782] via 134.1.1.1, 00:04:15, Serial0/1
4.0.0.0/24 is subnetted, 1 subnets
O 4.4.4.0 [110/782] via 134.1.1.4, 00:04:15, Serial0/1
R3#ping 4.4.4.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/57/60 ms
R3#show ip route ospf
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/782] via 134.1.1.1, 00:04:15, Serial0/1
4.0.0.0/24 is subnetted, 1 subnets
O 4.4.4.0 [110/782] via 134.1.1.4, 00:04:15, Serial0/1
R3#ping 4.4.4.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/57/60 ms
R4#show ip route ospf
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/782] via 134.1.1.1, 00:03:57, Serial0/1
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0 [110/782] via 134.1.1.3, 00:03:57, Serial0/1
R4#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/57/60 ms
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/782] via 134.1.1.1, 00:03:57, Serial0/1
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0 [110/782] via 134.1.1.3, 00:03:57, Serial0/1
R4#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/57/60 ms
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