海卓飞思科网络经验谈-把一台Cisco路由器配置为帧中继交换机

把一台Cisco路由器设备为帧中继交换机

1、  真验目的

经由过程本真验可以掌控

A.          了解帧中继交换机事情本理；

B.          了解PVC的不雅念；

C.          用路由器仿照帧中继交换机的设备。

2、  网络拓扑图：

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3、  真验办法

本真验把路由器R2设备成帧中继交换机

(一)   开启帧中继交换机功能

R2(config)#frame-relay switching

(二)   设备接口启拆帧中继

R2(config)#inte***ce s0/0

R2(config-if)#clock rate 128000

R2(config-if)#encapsulation frame-relay   //设备接口启拆帧中继

       R2(config-if)#no shutdown

【提示】

设备接口启拆为帧中继，接口上启用的默许帧中继启拆为Cisco启拆。假设要连接到别的一台Cisco路由器，则操纵该选项；假设连接到非Cisco路由器，要操纵ietf参数。

R2(config)#inte***ce serial 0/1

 

R2(config-if)#clock rate 128000

R2(config-if)#encapsulation frame-relay

R2(config-if)#no shutdown

 

R2(config)#inte***ce serial 0/2

R2(config-if)#clock rate 128000

R2(config-if)#encapsulation frame-relay

R2(config-if)#no shutdown

(三)   设备帧中继LMI规范和接口规范

R2(config)#inte***ce s0/0

R2(config-if)#frame-relay lmi-type cisco      //设备LMI规范

R2(config-if)#frame-relay intf-type dce       //设备接口为帧中继的DCE

【手艺要点】

A、 号令“frame-relay lmi-type { cisco |  ansi | q933a }”用来设备LMI的规范，默许时是Cisco规范；

B、 号令“frame-relay intf-type { dce |dte }”用来设备接口是帧中继的DCE借是DTE。要属意的是：帧中继接口DCE和物理接口端是DCE借是DTE无关，也就是讲即使接口是DTE端，也能够或许把它设备成帧中继是DCE。

R2(config)#inte***ce serial 0/1

R2(config-if)#frame-relay lmi-type cisco

R2(config-if)#frame-relay intf-type dce

R2(config)#inte***ce serial 0/2

R2(config-if)#frame-relay lmi-type cisco

R2(config-if)#frame-relay intf-type dce

(四)   设备路由器两个接口之间的PVC

R2(config)#inte***ce serial 0/0

R2(config-if)#frame-relay route 103 inte***ce s0/1 301

//定义接口S0/0和S0/1之间的PVC，竖立帧中继交换表

R2(config-if)#frame-relay route 104 inte***ce s0/2 401

//定义接口S0/0和S0/2之间的PVC，竖立帧中继交换表

R2(config)#inte***ce serial 0/1

R2(config-if)#frame-relay route 301 inte***ce serial 0/0 103

R2(config-if)#frame-relay route 304 inte***ce serial 0/2 403

R2(config)#inte***ce serial 0/2

R2(config-if)#frame-relay route 401 inte***ce serial 0/0 104

R2(config-if)#frame-relay route 403 inte***ce serial 0/1 304

4、  真验调试

A、 show frame-relay route

R2#sh frame-relay route             

Input Intf      Input Dlci      Output Intf     Output Dlci     Status

Serial0/0       103             Serial0/1       301             inactive

Serial0/0       104             Serial0/2       401             inactive

Serial0/1       301             Serial0/0       103             inactive

Serial0/1       304             Serial0/2       403             inactive

Serial0/2       401             Serial0/0       104             inactive

Serial0/2       403             Serial0/1       304             inactive

R2#

以上输出解释了路由器R2上设备了3条PVC，形态都是举动的，个中

“Serial0/0       103             Serial0/1       301             inactive”的含义是路由器假设从S0/0接口支到DLCI=103的帧，要从S0/1接**换出往，并且DLCI被交换为301。

B、 show frame-relay pvc

该号令用于显示路由器上设备的扫数PVC的统计疑息。

R2#sh frame-relay pvc inte***ce s0/0

 

PVC Statistics for inte***ce Serial0/0 (Frame Relay DCE) 

//该接口是帧中继的DCE

              Active     Inactive      Deleted       Static

  Local          0            0            0            0

  Switched       0            2            0            0

  Unused         0            0            0            0

//输出解释该接口有2条处于举动形态的PVC

DLCI = 103, DLCI USAGE = SWITCHED, PVC STATUS = INACTIVE, INTERFACE = Serial0/0

//DLCI为103的PVC处于举动形态，本地接口是S0/0，DLCI用途是完成帧中继DLCI交换

  input pkts 0             output pkts 0            in bytes 0        

  out bytes 0              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 0         out bcast bytes 0        

  30 second input rate 0 bits/sec, 0 packets/sec

  30 second output rate 0 bits/sec, 0 packets/sec

  switched pkts 0        

  Detailed packet drop counters:

  no out intf 0            out intf down 0          no out PVC 0        

  in PVC down 0            out PVC down 0           pkt too big 0        

  shaping Q full 0         pkt above DE 0           policing drop 0        

  pvc create time 00:28:35, last time pvc status changed 00:28:35

 //以上输出是DLCI为103的PVC的统计疑息

DLCI = 104, DLCI USAGE = SWITCHED, PVC STATUS = INACTIVE, INTERFACE = Serial0/0

 

  input pkts 0             output pkts 0            in bytes 0        

  out bytes 0              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 0         out bcast bytes 0        

  30 second input rate 0 bits/sec, 0 packets/sec

  30 second output rate 0 bits/sec, 0 packets/sec

  switched pkts 0        

  Detailed packet drop counters:

  no out intf 0            out intf down 0          no out PVC 0        

  in PVC down 0            out PVC down 0           pkt too big 0        

  shaping Q full 0         pkt above DE 0           policing drop 0        

  pvc create time 00:26:45, last time pvc status changed 00:26:45

//以上输出是DLCI为104的PVC的统计疑息

R2#

C、 show frame-relay lmi

该号令用来查看LMI的统计疑息。

R2#sh frame-relay lmi

 

LMI Statistics for inte***ce Serial0/0 (Frame Relay DCE) LMI TYPE = CISCO

//接口S0/0是帧中继的DCE,LMI规范为Cisco

  Invalid Unnumbered info 0             Invalid Prot Disc 0

  Invalid dummy Call Ref 0              Invalid Msg Type 0

  Invalid Status Message 0              Invalid Lock Shift 0

  Invalid Information ID 0              Invalid Report IE Len 0

  Invalid Report Request 0              Invalid Keep IE Len 0

  Num Status Enq. Rcvd 0                Num Status msgs Sent 0

//帧中继交换机支到的LMI形态查询动静的数目和从帧中继交换机背路由器发送的LMI形态疑息的数目

  Num Update Status Sent 0              Num St Enq. Timeouts 232

 //以上7行显示了接口S0/0的LMI的统计疑息

LMI Statistics for inte***ce Serial0/1 (Frame Relay DCE) LMI TYPE = CISCO

  Invalid Unnumbered info 0             Invalid Prot Disc 0

  Invalid dummy Call Ref 0              Invalid Msg Type 0

  Invalid Status Message 0              Invalid Lock Shift 0

  Invalid Information ID 0              Invalid Report IE Len 0

  Invalid Report Request 0              Invalid Keep IE Len 0

  Num Status Enq. Rcvd 0                Num Status msgs Sent 0

  Num Update Status Sent 0              Num St Enq. Timeouts 185

 //以上7行显示了接口S0/1的LMI的统计疑息

LMI Statistics for inte***ce Serial0/2 (Frame Relay DCE) LMI TYPE = CISCO

  Invalid Unnumbered info 0             Invalid Prot Disc 0

  Invalid dummy Call Ref 0              Invalid Msg Type 0

  Invalid Status Message 0              Invalid Lock Shift 0

  Invalid Information ID 0            {ww.hydrophis.c}  Invalid Report IE Len 0

  Invalid Report Request 0              Invalid Keep IE Len 0

  Num Status Enq. Rcvd 0                Num Status msgs Sent 0

  Num Update Status Sent 0              Num St Enq. Timeouts 181

//以上7行显示了接口S0/2的LMI的统计疑息

R2#