帧中继交换FR的配置
FR(config)#frame-relay switching ！配置为帧中继交换机
注意：
帧中继在思科模拟器无法配置，需要使用GNS3
FR帧中继路由配置以s0/0接口为例：FR(config-if)#frame-relay route 101 interface s0/2 102
意思是：来着DLCI 101（如图自定义）数据从s0/2 走向链路 102（我们自定义的）
接口s0/0配置：
FR(config)#inter s0/0 ！进入接口配置
FR(config-if)#encapsulation frame-relay ！设置数据封装模式为帧中继
FR(config-if)#frame-relay intf-type dce ！设置接口模式为DCE
FR(config-if)#clock rate 64000 ！设置时钟频率
FR(config-if)#frame-relay route 101 interface s0/2 102 ！帧中继路由
FR(config-if)#frame-relay route 201 interface s0/1 202 ！帧中继路由
FR(config-if)#no shut ！激活接口
接口s0/1配置：
FR(config)#inter s0/1
FR(config-if)#encapsulation frame-relay
FR(config-if)#frame-relay intf-type dce
FR(config-if)#clock rate 64000
frame-relay route 202 interface Serial0/0 201
frame-relay route 302 interface Serial0/2 301
FR(config-if)#no shut
接口s0/2配置：
FR(config)#inter s0/1
FR(config-if)#encapsulation frame-relay
FR(config-if)#frame-relay intf-type dce
FR(config-if)#clock rate 64000
frame-relay route 102 interface Serial0/0 101
frame-relay route 301 interface Serial0/1 302
FR(config-if)#no shut
R1路由配置
注意：链路设置：frame-relay map ip 10.0.0.19 101 broadcast
意思大概为：到达10.0.0.19的数据从DLCI：101走，必须严格与FR链路设置对应
R1(config-if)#ip ospf network point-to-multipoint 这个语句是决定ospf是否能在帧中继网络中进行传输
R1(config)#inter lo 0 ！配置路由ID，用于OSPF内部选举
R1(config-if)#ip add 3.3.3.3 255.255.255.0 ！路由ID
R1(config-if)#exit
R1(config)#inter s0/0 ！进入接口配置
R1(config-if)#encapsulation frame-relay ！设置封装协议
R1(config-if)#frame-relay map ip 10.0.0.19 101 broadcast ！帧中继的链路设置
R1(config-if)#frame-relay map ip 10.0.0.18 201 broadcast
R1(config-if)#ip add 10.0.0.17 255.255.255.248 ！配置ip地址
R1(config-if)#ip ospf network point-to-multipoint ！启用osof点对多点广播，关键！
R1(config-if)#no shut
R1(config)#inter lo 1 ！配置虚拟接口，用于ospf的测试
R1(config-if)#ip add 192.168.1.1 255.255.255.0
R1(config)#router ospf 100 ！ospf的配置
R1(config-router)#network 192.168.1.0 0.0.0.255 area 0
R1(config-router)#network 10.0.0.16 0.0.0.7 area 0
R2路由配置
R2(config)#inter lo 0
R2(config-if)#ip add 4.4.4.4 255.255.255.0
R2(config-if)#exit
R2(config)#inter s0/0
R2(config-if)#ip add 10.0.0.19 255.255.255.248
R2(config-if)#encapsulation frame-relay
R2(config-if)#frame-relay map ip 10.0.0.17 102 broadcast
R2(config-if)#frame-relay map ip 10.0.0.18 301 broadcast
R2(config-if)#ip ospf network point-to-multipoint
R2(config-if)#no shut
R2(config)#inter lo 1
R2(config-if)#ip add 192.168.2.1 255.255.255.0
R2(config)#router ospf 100
R2(config-router)#network 192.168.2.0 0.0.0.255 area 0
R2(config-router)#network 10.0.0.16 0.0.0.7 area 0
R3路由配置
R3(config)#inter lo 0
R3(config-if)#ip add 5.5.5.5 255.255.255.0
R3(config-if)#exit
R3(config)#inter s0/0
R3(config-if)#ip add 10.0.0.18 255.255.255.248
R3(config-if)#encapsulation frame-relay
R3(config-if)#frame-relay map ip 10.0.0.17 202 broadcast
R3(config-if)#frame-relay map ip 10.0.0.19 302 broadcast
R3(config-if)#ip ospf network point-to-multipoint
R3(config-if)#no shut
R3(config)#inter lo 1
R3(config-if)#ip add 192.168.3.1 255.255.255.0
R3(config)#router ospf 100
R3(config-router)#network 192.168.3.0 0.0.0.255 area 0
R3(config-router)#network 10.0.0.16 0.0.0.7 area 0
测试阶段：
都能学习得到所有路由器上声明的网段
R1#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback0
10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
O 10.0.0.18/32 [110/64] via 10.0.0.18, 00:04:14, Serial0/0
O 10.0.0.19/32 [110/64] via 10.0.0.19, 00:04:14, Serial0/0
C 10.0.0.16/29 is directly connected, Serial0/0
C 192.168.1.0/24 is directly connected, Loopback1
192.168.2.0/32 is subnetted, 1 subnets
O 192.168.2.1 [110/65] via 10.0.0.19, 00:04:14, Serial0/0
192.168.3.0/32 is subnetted, 1 subnets
O 192.168.3.1 [110/65] via 10.0.0.18, 00:04:15, Serial0/0
测试连通性：
R1#ping 192.168.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/30/52 ms
R1#ping 192.168.3.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.3.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 44/60/76 ms
R1#
