帧中继环境下NBMA 模式.docx

实验 帧中继环境下NBMA 模式实验配置： 配置帧中继交换机R2： R2(config)#frame-relay switching R2(config)#int s1/1 R2(config-if)#encapsulation frame-relay R2(config-if)#frame intf-type dce R2(config-if)#clock rate 64000 R2(config-if)#frame-relay route 301 int s1/2 103 R2(config-if)#no shut R2(config-if)#int s1/2 R2(config-if)#encap frame-relay R2(config-if)#frame intf-type dceR2(config-if)#clock rate 64000 R2(config-if)#frame-relay route 103 int s1/1 301 R2(config-if)#frame-relay route 104 int s1/3 401 R2(config-if)#no shut R2(config-if)#int s1/3 R2(config-if)#encap frame-relay R2(config-if)#frame intf-type dce R2(config-if)#clock rate 64000 R2(config-if)#frame-relay route 401 int s1/2 104 R2(config-if)#no shut 配置R1R1(config)#int lo0R1(config-subif)#ip address 1.1.1.1 255.255.255.0R1(config-subif)#ip ospf network point-to-pointR1(config)#int s0/3R1(config-subif)#ip address 134.1.1.1 255.255.255.0R1(config-if)#encapsulation frame-relayR1(config-if)#no frame-relay inverse-arpR1(config-if)#no shutdownR1(config-subif)#frame-relay map ip 134.1.1.3 103 broadcastR1(config-subif)#frame-relay map ip 134.1.1.4 104 broadcastR1(config-subif)#frame-relay map ip 134.1.1.1 103 /使得可以ping通自己R1(config-subif)#exitR1(config)#router ospf 1R1(config-router)#router-id 1.1.1.1R1(config-router)#network 1.1.1.0 0.0.0.255 area 0R1(config-router)#network 134.1.1.0 0.0.0.255 area 0R1(config-router)#neighbor 134.1.1.3 /手工指定OSPF邻居R1(config-router)#neighbor 134.1.1.4配置R3R3(config)#int lo0R3(config-if)#ip address 3.3.3.3 255.255.255.0R3(config-subif)#ip ospf network point-to-pointR3(config)#int s0/0R3(config-if)#ip address 134.1.1.3 255.255.255.0R3(config-if)#encapsulation frame-relayR3(config-if)#ip ospf priority 0 /配置spoke端OSPF接口优先级为0R3(config-if)#frame-relay map ip 134.1.1.1 301 broadcastR3(config-if)#frame-relay map ip 134.1.1.4 301 broadcastR3(config-if)#frame-relay map ip 134.1.1.3 301R3(config-if)#no frame-relay inverse-arpR3(config-if)#no shutdownR3(config-subif)#exitR3(config)#router ospf 1R3(config-router)#router-id 3.3.3.3R3(config-router)#network 3.3.3.0 0.0.0.255 area 0R3(config-router)#network 134.1.1.0 0.0.0.255 area 0配置R4R4(config)#int lo0R4(config-if)#ip address 4.4.4.4 255.255.255.0R4(config-subif)#ip ospf network point-to-pointR4(config)#int s0/0R4(config-if)#ip address 134.1.1.4 255.255.255.0R4(config-if)#encapsulation frame-relayR4(config-if)#ip ospf priority 0R4(config-if)#frame-relay map ip 134.1.1.1 401 broadcastR4(config-if)#frame-relay map ip 134.1.1.3 401 broadcastR4(config-if)#frame-relay map ip 134.1.1.4 401 R4(config-if)#no frame-relay inverse-arpR4(config-if)#no shutdownR4(config-subif)#exitR4(config)#router ospf 1R4(config-router)#router-id 4.4.4.4R4(config-router)#network 4.4.4.0 0.0.0.255 area 0R4(config-router)#network 134.1.1.0 0.0.0.255 area 0实验调试（1）R1#show ip ospf int s0/3Serial0/3 is up, line protocol is up Internet Address 134.1.1.1/24, Area 0 Process ID 1, Router ID 1.1.1.1, Network Type NON_BROADCAST, Cost: 64 Transmit Delay is 1 sec, State DR, Priority 1 /自己是DR，优先级为1 Designated Router (ID) 1.1.1.1, Interface address 134.1.1.1 /DR的ID和接口地址 No backup designated router on this network Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5NBMA模式下，Hello周期为30秒 oob-resync timeout 120 Hello due in 00:00:16 Supports Link-local Signaling (LLS) Index 2/2, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 4 msec, maximum is 4 msec Neighbor Count is 2, Adjacent neighbor count is 2 Adjacent with neighbor 3.3.3.3 Adjacent with neighbor 4.4.4.4 /与路由器R3和R4形成邻接关系 Suppress hello for 0 neighbor(s)（2）R3#show ip route ospf1.0.0.0/24 is subnetted, 1 subnetsO 1.1.1.0 110/65 via 134.1.1.1, 00:01:47, Serial0/0/04.0.0.0/24 is subnetted, 1 subnetsO 4.4.4.0 110/65 via 134.1.1.4, 00:01:47, Serial0/0/0从以上输出表明，到达网络“4.4.4.0/24”的路由条目的下一跳地址为“134.1.1.4”，而不是“134.1.1.1”，所以，在 R3 的 s0/0/1 的接口上必须有到 134.1.1.4 的映射“frame-relay map ip 134.1.1.4 301 broadcast”（3）R1#show ip ospf neighbor detailNeighbor 3.3.3.3, interface address 134.1.1.3In the area 0 via interface Serial0/0/0Neighbor priority is 0, State is FULL, 9 state changesDR is 134.1.1.1 BDR is 0.0.0.0Poll interval 120Options is 0x52LLS Options is 0x1 (LR)Dead timer due in 00:01:53Neighbor is up for 00:06:54Last retransmission scan length is 1, maximum is 1Last retransmission scan time is 0 msec, maximum is 0 msecNeighbor 4.4.4.4, interface address 134.1.1.4In the area 0 via interface Serial0/0/0Neighbor priority is 0, State is FULL, 9 state changesDR is 134.1.1.1 BDR is 0.0.0.0Poll interval 120Options is 0x52LLS Options is 0x1 (LR)Dead timer due in 00:01:43Neighbor is up for 00:06:54Last retransmission scan length is 1, maximum is 1Last retransmission scan time is 0 msec, maximum is 0 msec以上输出表明R1的两个邻居的接口优先级为0。同时本网络的BDR为0.0.0.0，这是可以的。【技术要点】（1）在帧中继网络上，OSPF 接口缺省的网络类型为 NON_BROA