【CCNA】思科帧中继、EIGRP与子接口应用实验
实验拓扑：
这是著名的红茶三杯耿叔的实验，将R4作为帧中继交换机，R1做2个子接口，DLCI号分别为102,103
R2与R3也分别做子接口，DLCI号为201和301(如图）。
实验目的：1.通过帧中继，使R1与R2，R1与R3互通
2.分别在R1,R2,R3上做虚拟网段1.1.1.1 ,2.2.2.2 ,3.3.3.3，使互相都能学习到。
实验步骤：1.首先配置R4
R4#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R4(config)#no ip routing
R4(config)#frame-relay switching /指定为帧中继交换机
R4(config)#int s1/1
R4(config-if)#no sh
*Mar 1 00:26:56.955: %LINK-3-UPDOWN: Interface Serial1/1, changed state to up
*Mar 1 00:26:57.955: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed state to up
R4(config-if)#encapsulation frame-relay /封装
R4(config-if)#clock rate 64000
R4(config-if)#frame-relay intf-type dce
R4(config-if)#frame-relay route 102 int s1/2 201
R4(config-if)#frame-relay route 103 int s1/3 301 /指定本地DLCI与对应DLCI
*Mar 1 00:27:58.223: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed state to down
R4的s1/1口配置完毕，同理，配置s1/2和s1/3口
R4(config-if)#int s1/2
R4(config-if)#no sh
*Mar 1 00:30:29.043: %LINK-3-UPDOWN: Interface Serial1/2, changed state to up
*Mar 1 00:30:30.043: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/2, changed state to up
R4(config-if)#encapsulation frame-relay
R4(config-if)#clo rate 64000
R4(config-if)#frame-relay intf-type dce
R4(config-if)#frame-relay route 201 int s1/1 102
R4(config-if)#
*Mar 1 00:31:24.627: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/2, changed state to down
R4(config-if)#int s1/3
R4(config-if)#no sh
R4(config-if)#encapsulation frame-relay
R4(config-if)#
*Mar 1 00:31:46.835: %LINK-3-UPDOWN: Interface Serial1/3, changed state to up
*Mar 1 00:31:47.835: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/3, changed state to up
R4(config-if)#clo rate 64000
R4(config-if)#frame-relay intf-type dce
R4(config-if)#frame-relay route 301 int s1/1 103
这样,R4的配置接完成了，下面配置R1,R2,R3
R1
R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#int s1/0
R1(config-if)#no sh
*Mar 1 00:35:26.943: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up
*Mar 1 00:35:27.943: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up
R1(config-if)#encapsulation frame-relay
R1(config-if)#ex
R1(config)#int s1/0.12 point-to-point /进子接口，点对点方式
R1(config-subif)#ip add 10.1.12.1 255.255.255.0
R1(config-subif)#no sh
R1(config-subif)#frame-relay interface-dlci 102 /指定DLCI
R1(config-fr-dlci)#ex
R1(config-subif)#ex
R1(config)#int s1/0.13 point-to-point
R1(config-subif)#ip add 10.1.13.1 255.255.255.0
R1(config-subif)#no sh
R1(config-subif)#frame-relay interface-dlci 103
R1#show frame-relay map
Serial1/0.12 (down): point-to-point dlci, dlci 102(0x66,0x1860), broadcast
status defined, inactive
Serial1/0.13 (down): point-to-point dlci, dlci 103(0x67,0x1870), broadcast
status defined, inactive
可以发现，两个子接口已经自动变成广播形式。
R2
R2(config)#int s1/0
R2(config-if)#no sh
*Mar 1 00:39:56.155: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up
*Mar 1 00:39:57.155: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up
R2(config-if)#encapsulation frame-relay
R2(config-if)#
*Mar 1 00:40:25.271: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
R2(config-if)#ex
R2(config)#
*Mar 1 00:40:27.455: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up
R2(config)#int s1/0.12 point-to-point
R2(config-subif)#ip add 10.1.12.2 255.255.255.0
R2(config-subif)#no sh
R2(config-subif)#frame-relay interface-dlci 201
R2(config-fr-dlci)#end
*Mar 1 00:40:58.447: %SYS-5-CONFIG_I: Configured from console by console
R2#show frame-relay map
Serial1/0.12 (up): point-to-point dlci, dlci 201(0xC9,0x3090), broadcast
status defined, active
可以发现，接口已经激活了。
R3
R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#int s1/0
R3(config-if)#no sh
R3(config-if)#encapsulation frame-relay
*Mar 1 00:43:18.151: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up
*Mar 1 00:43:19.151: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up
R3(config-if)#encapsulation frame-relay
R3(config-if)#ex
R3(config)#int s1/0.13 point-to-point
R3(config-subif)#ip add 10.1.13.3 255.255.255.0
R3(config-subif)#no sh
R3(config-subif)#frame-relay interface-dlci 301
R3(config-fr-dlci)#end
*Mar 1 00:43:56.467: %SYS-5-CONFIG_I: Configured from console by console
R3#show frame-relay map
Serial1/0.13 (up): point-to-point dlci, dlci 301(0x12D,0x48D0), broadcast
status defined, active
R3也激活了
在R1上查看一下map
R1#show frame-relay map
Serial1/0.12 (up): point-to-point dlci, dlci 102(0x66,0x1860), broadcast
status defined, active
Serial1/0.13 (up): point-to-point dlci, dlci 103(0x67,0x1870), broadcast
status defined, active
可以发现，已经学习到了R2和R3的帧中继了。
连通测试：
R1#p 10.1.12.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.12.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/44/64 ms
R1#p 10.1.13.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.13.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/50/88 ms
R1与R2,R3都可以ping通了。
下面，在R1,R2,R3上做虚拟接口，用EIGRP使全网互通。
R1(config)#int l0
R1(config-if)#
*Mar 1 00:51:26.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R1(config-if)#ip add 1.1.1.1 255.255.255.255
R1(config-if)#no sh
R1(config-if)#router ei 1 /EIGRP
R1(config-router)#no auto-summary
R1(config-router)#network 10.0.0.0 /宣告网段
R1(config-router)#network 1.1.1.1
R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#int l0
*Mar 1 00:52:43.727: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R2(config-if)#ip add 2.2.2.2 255.255.255.255
R2(config-if)#no sh
R2(config-if)#router ei 1
R2(config-router)#no auto-summary
R2(config-router)#network 10.0.0.0
*Mar 1 00:53:06.799: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.12.1 (Serial1/0.12) is up: new adjacency
R2(config-router)#network 2.2.2.2
R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#int l0
*Mar 1 00:53:50.815: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R3(config-if)#ip add 3.3.3.3 255.255.255.255
R3(config-if)#no sh
R3(config-if)#router ei 1
R3(config-router)#no auto-summary
R3(config-router)#network 10.0.0.0
*Mar 1 00:54:13.195: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.13.1 (Serial1/0.13) is up: new adjacency
R3(config-router)#network 3.3.3.3
配置完成，在R1，R2 ,R3上查看是否能互相学习到3个网段。
R1#show ip route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
2.0.0.0/32 is subnetted, 1 subnets
D 2.2.2.2 [90/2297856] via 10.1.12.2, 00:00:25, Serial1/0.12
3.0.0.0/32 is subnetted, 1 subnets
D 3.3.3.3 [90/2297856] via 10.1.13.3, 00:00:09, Serial1/0.13
10.0.0.0/24 is subnetted, 2 subnets
C 10.1.13.0 is directly connected, Serial1/0.13
C 10.1.12.0 is directly connected, Serial1/0.12
R2#show ip
*Mar 1 01:02:06.219: %SYS-5-CONFIG_I: Configured from console by console
R2#show ip route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
D 1.1.1.1 [90/2297856] via 10.1.12.1, 00:02:12, Serial1/0.12
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
D 3.3.3.3 [90/2809856] via 10.1.12.1, 00:01:23, Serial1/0.12
10.0.0.0/24 is subnetted, 2 subnets
D 10.1.13.0 [90/2681856] via 10.1.12.1, 00:09:00, Serial1/0.12
C 10.1.12.0 is directly connected, Serial1/0.12
R3#show ip route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
D 1.1.1.1 [90/2297856] via 10.1.13.1, 00:02:47, Serial1/0.13
2.0.0.0/32 is subnetted, 1 subnets
D 2.2.2.2 [90/2809856] via 10.1.13.1, 00:02:14, Serial1/0.13
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
10.0.0.0/24 is subnetted, 2 subnets
C 10.1.13.0 is directly connected, Serial1/0.13
D 10.1.12.0 [90/2681856] via 10.1.13.1, 00:08:28, Serial1/0.13
R1,R2,R3都可以互相学习虚拟网段了，全网互通。