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Frame-relay配置实例

简介:
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实验环境
Dynamips模拟器
Cisco IOS Software, 3700 Software (C3745-ADVIPSERVICESK9-M), Version 12.4(4)T, RELEASE SOFTWARE (fc1)
 
拓扑结构
如下图所示, R1、R2、R3三台路由器通过帧中继云相互连接。
四台设备都是C3475路由器,其中路由器R4用来模拟帧中继交换机FR(注:在实验环境中,模拟帧中继交换机的路由器至少有三个广域网串口)。
 

 
实验要求
实现帧中继网络通信;在帧中继网络上运行EIGRP路由选择协议。
 
操作步骤
 
一、基本配置(路由器改名等,略)
 
二、配置帧中继交换机
 
FR(config)#
FR(config)#frame-relay switching  ! 开启frame 交换功能
FR(config)#int s3/1
FR(config-if)#encapsulation frame-relay ietf  ! 接口封装帧中继
FR(config-if)#frame-relay intf-type dce  ! 为了帧中继交换,将接口配置为DCE
FR(config-if)#frame-relay lmi-type ansi !本地接口封装类型由默认的cisco改为ansi
FR(config-if)#clock rate 64000
FR(config-if)#frame-relay route 102 interface s3/2 201  ! 指定路由
FR(config-if)#frame-relay route 103 interface s3/3 301
FR(config-if)#no shutdown 
FR(config-if)#exit
FR(config)#
FR(config)#int s3/2
FR(config-if)#encapsulation frame-relay ietf
FR(config-if)#frame-relay intf-type dce
FR(config-if)#frame-relay lmi-type ansi
FR(config-if)#clock rate 64000
FR(config-if)#frame-relay route 201 interface s3/1 102
FR(config-if)#frame-relay route 203 interface s3/3 302
FR(config-if)#no shutdown 
FR(config-if)#exit
FR(config)#
FR(config)#int s3/3
FR(config-if)#encapsulation frame-relay ietf
FR(config-if)#frame-relay intf-type dce
FR(config-if)#frame-relay lmi-type ansi
FR(config-if)#clock rate 64000
FR(config-if)#frame-relay route 301 interface s3/1 103
FR(config-if)#frame-relay route 302 interface s3/2 203
FR(config-if)#no shutdown 
FR(config-if)#end
FR#
------------------------------------------------------
查看FR路由
FR#sh frame-relay route 
Input Intf      Input Dlci      Output Intf     Output Dlci     Status
Serial3/1       102             Serial3/2       201             inactive
Serial3/1       103             Serial3/3       301             inactive
Serial3/2       201             Serial3/1       102             inactive
Serial3/2       203             Serial3/3       302             inactive
Serial3/3       301             Serial3/1       103             inactive
Serial3/3       302             Serial3/2       203             inactive
可以看到,此时的帧中继链路是非激活的。
 
 
三、配置R1、R2、R3路由器
 
R1(config)#int s3/1
R1(config-if)#ip add 192.168.123.1 255.255.255.0
R1(config-if)#encapsulation frame-relay ietf 
R1(config-if)#no frame-relay inverse-arp !关闭ARP
R1(config-if)#frame-relay lmi-type ansi 
R1(config-if)#frame-relay map ip 192.168.123.2 102 broadcast !指定静态映射
R1(config-if)#frame-relay map ip 192.168.123.3 103 broadcast
R1(config-if)#no shutdown 
R1(config-if)#exit
R1(config)#
------------------------------------------------------
R2(config)#int s3/2
R2(config-if)#ip add 192.168.123.2 255.255.255.0
R2(config-if)#encapsulation frame-relay ietf
R2(config-if)#no frame-relay inverse-arp 
R2(config-if)#frame-relay lmi-type ansi 
R2(config-if)#frame-relay map ip 192.168.123.1 201 broadcast
R2(config-if)#frame-relay map ip 192.168.123.3 203 broadcast
R2(config-if)#no shutdown 
R2(config-if)#exit
R2(config)#
------------------------------------------------------
R3(config)#int s3/3
R3(config-if)#ip add 192.168.123.3 255.255.255.0
R3(config-if)#encapsulation frame-relay ietf 
R3(config-if)#no frame-relay inverse-arp 
R3(config-if)#frame-relay lmi-type ansi 
R3(config-if)#frame-relay map ip 192.168.123.1 301 broadcast
R3(config-if)#frame-relay map ip 192.168.123.2 302 broadcast
R3(config-if)#no shutdown 
R3(config-if)#exit
R3(config)#
 
 
四、验证配置
 
查看FR路由
FR#sh frame-relay route 
Input Intf      Input Dlci      Output Intf     Output Dlci     Status
Serial3/1       102             Serial3/2       201             active
Serial3/1       103             Serial3/3       301             active
Serial3/2       201             Serial3/1       102             active
Serial3/2       203             Serial3/3       302             active
Serial3/3       301             Serial3/1       103             active
Serial3/3       302             Serial3/2       203             active
配置好各路由器后,此时各帧中继链路都自动变为激活状态(前提是配置无误)。
------------------------------------------------------
查看映射
R1#sh frame-relay map
Serial3/1 (up): ip 192.168.123.2 dlci 102(0x66,0x1860), static,
              broadcast,
              IETF, status defined, active
Serial3/1 (up): ip 192.168.123.3 dlci 103(0x67,0x1870), static,
              broadcast,
              IETF, status defined, active
------------------------------------------------------
R2#sh frame-relay map
Serial3/2 (up): ip 192.168.123.1 dlci 201(0xC9,0x3090), static,
              broadcast,
              IETF, status defined, active
Serial3/2 (up): ip 192.168.123.3 dlci 203(0xCB,0x30B0), static,
              broadcast,
              IETF, status defined, active
------------------------------------------------------
R3#sh frame-relay map
Serial3/3 (up): ip 192.168.123.1 dlci 301(0x12D,0x48D0), static,
              broadcast,
              IETF, status defined, active
Serial3/3 (up): ip 192.168.123.2 dlci 302(0x12E,0x48E0), static,
              broadcast,
              IETF, status defined, active
------------------------------------------------------
查看永久虚电路,以R3为例
R3#sh frame-relay pvc
 
PVC Statistics for interface Serial3/3 (Frame Relay DTE)
 
              Active     Inactive      Deleted       Static
  Local          2            0            0            0
  Switched       0            0            0            0
  Unused         0            0            0            0
 
DLCI = 301, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial3/3
 
  input pkts 9             output pkts 8            in bytes 540       
  out bytes 476            dropped pkts 0           in pkts dropped 0         
  out pkts dropped 0                out bytes dropped 0         
  in FECN pkts 0           in BECN pkts 0           out FECN pkts 0         
  out BECN pkts 0          in DE pkts 0             out DE pkts 0         
  out bcast pkts 2         out bcast bytes 128       
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:01:39, last time pvc status changed 00:01:39
          
DLCI = 302, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial3/3
 
  input pkts 8             output pkts 13           in bytes 448       
  out bytes 676            dropped pkts 0           in pkts dropped 0         
  out pkts dropped 0                out bytes dropped 0         
  in FECN pkts 0           in BECN pkts 0           out FECN pkts 0         
  out BECN pkts 0          in DE pkts 0             out DE pkts 0         
  out bcast pkts 1         out bcast bytes 64        
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:01:21, last time pvc status changed 00:01:21
 
 
五、测试网络连通性
 
R1#ping 192.168.123.2
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.123.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/55/72 ms
------------------------------------------------------
R1#ping 192.168.123.3
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.123.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/40/68 ms
------------------------------------------------------
R2#ping 192.168.123.3
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.123.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/42/68 ms
------------------------------------------------------
 
至此,路由器之间能正常通讯。
但此时,路由器ping自己是ping不通的。比如R1:
R1#ping 192.168.123.1
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.123.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
------------------------------------------------------
为什么呢?因为frame-relay map里面并没有相关信息。需要手工添加,比如在R1上添加:
R1(config)#int s3/1
R1(config-if)#frame-relay map ip 192.168.123.1 102
 
然后我们再看一下R1上的映射
R1#sh frame-relay map 
Serial3/1 (up): ip 192.168.123.1 dlci 102(0x66,0x1860), static,
              IETF, status defined, active
Serial3/1 (up): ip 192.168.123.2 dlci 102(0x66,0x1860), static,
              IETF, status defined, active
Serial3/1 (up): ip 192.168.123.3 dlci 103(0x67,0x1870), static,
              IETF, status defined, active
 
此时再R1ping自己,便能ping通了。
R1#ping 192.168.123.1 
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/97/140 ms
 
 
六、启动回环口,配置EIGRP
 
R1(config)#int loop 0
R1(config-if)#ip add 1.1.1.1 255.255.255.0
R1(config-if)#exit
R1(config)#router eigrp 50
R1(config-router)#net 192.168.123.0 0.0.0.255
R1(config-router)#net 1.1.1.0 0.0.0.255
R1(config-router)#no auto-summary 
R1(config-router)#exit
------------------------------------------------------
R2(config)#int loop 0
R2(config-if)#ip add 2.2.2.2 255.255.255.0
R2(config-if)#exit
R2(config)#router eigrp 50
R2(config-router)#net 192.168.123.0 0.0.0.255
R2(config-router)#net 2.2.2.0 0.0.0.255
R2(config-router)#no auto-summary
R2(config-router)#exit
------------------------------------------------------
R3(config)#int loop 0
R3(config-if)#ip add 3.3.3.3 255.255.255.0
R3(config-if)#exit
R3(config)#router eigrp 50
R3(config-router)#net 192.168.123.0 0.0.0.255
R3(config-router)#net 3.3.3.0 0.0.0.255 
R3(config-router)#no auto-summary 
R3(config-router)
 
 
七、查看EIGRP路由
 
配置完成后,查看R1发现的eigrp邻居及其学习到的路由
R1#sh ip eigrp neighbors 
IP-EIGRP neighbors for process 50
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
1   192.168.123.3           Se3/1            162 00:09:26 1041  5000  0  6
0   192.168.123.2           Se3/1            163 00:09:26   75   450  0  6
------------------------------------------------------
R1#sh ip route
Codes: C - connected, S - static, 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
       i - IS-IS, su - IS-IS summary, 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
 
C    192.168.123.0/24 is directly connected, Serial3/1
     1.0.0.0/24 is subnetted, 1 subnets
C       1.1.1.0 is directly connected, Loopback0
     2.0.0.0/24 is subnetted, 1 subnets
D       2.2.2.0 [90/2297856] via 192.168.123.2, 00:07:26, Serial3/1
     3.0.0.0/24 is subnetted, 1 subnets
D       3.3.3.0 [90/2297856] via 192.168.123.3, 00:07:26, Serial3/1
------------------------------------------------------
进行ping测试
R1#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 = 12/37/64 ms
 
注:前面在配置映射时,设定了采用广播方式broadcast(如果不增加这个字段,表示采用非广播方式,则本实验是不能成功的),比如R1,
R1(config-if)#frame-relay map ip 192.168.123.2 102 broadcast
R1(config-if)#frame-relay map ip 192.168.123.3 103 broadcast
由于EIGRP默认是支持广播的,所以EIGRP能自动的发现邻居。
如果运行OSPF,默认是NBMA环境,不支持广播,因而不能自动发现邻居,需要静态的指定邻居,才能学习到其他路由器上的路由。


本文转自Sunshyfangtian 51CTO博客,原文链接:http://blog.51cto.com/sunshyfangtian/813815,如需转载请自行联系原作者

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