-帧中继子接口试验配置
上一篇博文配置帧中继时A对B和C分别作了一个DLCI协议的封装，那样显然有些麻烦，但是如果遇到非全网的情况这样就不能解决问题了。也就是下面要提到的星型拓扑网络。
试验环境和上一篇博文一样：
A：连接帧中继的端口：202.110.100.1 255.255.255.0
局域网端口192.168.10.1 255.255.255.0
B：连接帧中继的端口：202.110.100.2 255.255.255.0
局域网端口192.168.10.2 255.255.255.0
C：连接帧中继的端口：202.110.100.3 255.255.255.0
局域网端口192.168.10.3 255.255.255.0
就
这里如果按照上一篇博文的思路问题就出现了。A能收到B的路由，也能收到C的路由，但是B和C不能相互通信，原因是由于水平分隔，那么什么是水平分隔呢？在前面我是写过的，这里再重复一遍：水平分隔是指某个端口发送的路由不包括从该端口收到的路由，这样的话一切就解决了，以上结果是正常的，为了解决水平分隔，这里提出划分逻辑子接口，就是将物理端口分为多个逻辑子接口。
在
A
上做：其中物理端口建立子接口。
Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#host A
A(config)#int e0
A(config-if)#ip addr 192.168.10.1 255.255.255.0
A(config-if)#no shut
%LINK-3-UPDOWN: Interface Ethernet0, changed state to up
A(config-if)#int s0
A(config-if)#no ip addr //物理端口无需配IP和掩码
A(config-if)#encap frame-relay 封装帧中继协议
A(config-if)#no shut
%LINK-3-UPDOWN: Interface Serial0, changed state to up
%LINK-3-UPDOWN: Interface Serial0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to down
A(config-if)#int s0.1 foint-to-point //指定子接口类型
A(config-subif)#ip addr 202.110.100.1 255.255.255.0
A(config-subif)#frame-relay interface-dlci 102 //配置DLCI值
A(config-subif)#bandwidth 64 //指定传输速率
A(config-subif)#exit
A(config)#int s0.2
Incomplete Command.
A(config)#int s0.2 point-to-point //指定子接口类型
A(config-subif)#ip addr 202.110.101.1 255.255.255.0
A(config-subif)#frame-relay interface-dlci 103 //配置DLCI值
A(config-subif)#bandwidth 64 //指定传输速率
A(config-subif)#exit
A(config)#router eigrp 100 //提示：eigrp和帧中继的兼容性较好，所以这里采用eigrp协议。
A(config-router)#net 192.168.10.1
A(config-router)#net 202.110.100.0
A(config-router)#net 202.110.101.0
%LINK-3-UPDOWN: Interface Serial0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to up
21:49:39: %FR-5-DLCICHANGE: Interface Serial0.1 - DLCI 102 state changed to ACTIVE
21:49:39: %FR-5-DLCICHANGE: Interface Serial0.2 - DLCI 103 state changed to ACTIVE
A(config-router)#
由于子接口只需要再A上面做，故A上面操作成功决定了这个试验的成败。
在
B
上做：
Router>
Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#host B
B(config)#int e0
B(config-if)#ip addr 192.168.20.1 255.255.255.0
B(config-if)#no shut
%LINK-3-UPDOWN: Interface Ethernet0, changed state to up
B(config-if)#int s0
B(config-if)#ip addr 202.110.100.2 255.255.255.0
B(config-if)#encap frame-relay
B(config-if)#frame-relay interface-dlci 201
B(config-if)#bandwidth 64
B(config-if)#no shut
%LINK-3-UPDOWN: Interface Serial0, changed state to up
B(config-if)#exit
B(config)#router eigrp 100
B(config-router)#net 192.168.20.0
B(config-router)#net 202.110.100.0
B(config-router)#
在
C
上做：
Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#host C
C(config)#int e0
C(config-if)#ip addr 192.168.30.1 255.255.255.0
C(config-if)#no shut
%LINK-3-UPDOWN: Interface Ethernet0, changed state to up
C(config-if)#int s0
C(config-if)#ip addr 202.110.101.2 255.255.255.0
C(config-if)#encap frame-relay
C(config-if)#frame-relay interface-dlci 301
C(config-if)#bandwidth 64
C(config-if)#no shut
%LINK-3-UPDOWN: Interface Serial0, changed state to up
C(config-if)#exit
C(config)#router eigrp 100
C(config-router)#net 192.168.30.0
C(config-router)#net 202.110.101.0
C(config-router)#
A
上的路由测试：
A#
A#
A#show ip ro
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
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, * - candidate default
U - per-user static route
Gateway of last resort is not set
C 192.168.10.0 is directly connected, Ethernet0
C 202.110.100.0 is directly connected, 202.110.100.1
C 202.110.101.0 is directly connected, 202.110.101.1
D 192.168.20.0 [90/3061760] via 202.110.100.2, 00:10:36, Serial0.1
D 192.168.30.0 [90/3061760] via 202.110.101.2, 00:08:41, Serial0.2
B
上的路由测试：
B#
B#show ip ro
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
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, * - candidate default
U - per-user static route
Gateway of last resort is not set
C 192.168.20.0 is directly connected, Ethernet0
C 202.110.100.0 is directly connected, Serial0
D 192.168.10.0 [90/3061760] via 202.110.100.1, 00:02:22, Serial0
D 202.110.101.0 [90/3061760] via 202.110.100.1, 00:02:22, Serial0
D 192.168.30.0 [90/4267520] via 202.110.100.1, 00:00:32, Serial0
C
上的路由测试：
C#
C#show ip ro
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
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, * - candidate default
U - per-user static route
Gateway of last resort is not set
C 192.168.30.0 is directly connected, Ethernet0
C 202.110.101.0 is directly connected, Serial0
D 192.168.20.0 [90/4267520] via 202.110.101.1, 00:00:40, Serial0
D 192.168.10.0 [90/3061760] via 202.110.101.1, 00:00:40, Serial0
D 202.110.100.0 [90/3061760] via 202.110.101.1, 00:00:40, Serial0
在A上查看路由映射：
A#
A#show frame-relay map
Serial0.1 (up): point-to-point dlci, dlci 102(0x66,0x1860), broadcast
status defined, active
Serial0.2 (up): point-to-point dlci, dlci 103(0x66,0x1860), broadcast
status defined, active
在A上查看虚链路：
A#
A#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
DLCI = 102, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0.1
input pkts 34 output pkts 56 in bytes 5130
out bytes 13538 dropped pkts 29 in FECN pkts 72
in BECN pkts 117 out FECN pkts 43 out BECN pkts 30
in DE pkts 6 out DE pkts 78
out bcast pkts 98 out bcast bytes 12050
pvc create time 00:32:04, last time pvc status changed 00:32:05
PVC Statistics for interface Serial0 (Frame Relay DTE)
DLCI = 103, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0.2
input pkts 96 output pkts 107 in bytes 8719
out bytes 6717 dropped pkts 74 in FECN pkts 24
in BECN pkts 54 out FECN pkts 52 out BECN pkts 89
in DE pkts 97 out DE pkts 103
out bcast pkts 84 out bcast bytes 2434
pvc create time 00:32:04, last time pvc status changed 00:32:05
本文转自shenleigang 51CTO博客，原文链接：http://blog.51cto.com/shenleigang/150720，如需转载请自行联系原作者
