帧中继实验
1、将一台路由器模拟成帧中继交换机
FR(config)#frame-relay ? de-list Build a classification list to be used in setting the DE bit switching enable frame relay pvc switching 输入: FR(config)#frame-relay switching 2、在帧中继交换机上配置
1)在接口上封装帧中继协议 FR(config-if)#encapsulation frame-relay ? ietf Use RFC1490 encapsulation <cr> 帧中继有两种封装协议:cisco和ietf,cisco产品默认为cisco。 cisco产品和非cisco产品连接要使用ietf 2)查看接口是否为DCE,若是,则配置时钟。
FR#show controllers serial 0 HD unit 0, idb = 0x94C7C, driver structure at 0x99A00 buffer size 1524 HD unit 0, V.35 DCE cable 显示为DCE,使用要配时钟: FR(config-if)#clock rate 64000 有时候物理层没有UP起来,都可以使用该命令查看,如果是没有接线,则提示: FR#show controllers serial 0 HD unit 0, idb = 0x94C7C, driver structure at 0x99A00 buffer size 1524 HD unit 0, no cable 3)配置帧中继交换机的LMI类型 FR(config-if)#frame-relay lmi-type ? cisco ansi q933a 总共有三种,常用cisco和ansi 可以通过show查看 FR#show frame-relay lmi LMI Statistics for interface Serial0 (Frame Relay DTE) LMI TYPE = CISCO 在11.2以上版本的IOS中不需要设置,路由器可以自动感知。 4)强制将该端口设置为DCE.因为帧中继交换机一般为ISP端设备,为用户端设备提供时钟。
FR(config-if)#frame-relay intf-type ? dce Configure a FR DCE dte Configure a FR DTE nni Configure a FR NNI FR(config-if)#frame-relay intf-type dce 5)用DLCI标示网络中路由器的身份,配置DLCI的映射。
R1(config-if)#frame-relay ? route frame relay route for pvc switching FR(config-if)#frame-relay route ? <16-1007> input dlci to be switched DLCI值用10位表示,共有1024个值,但是只使用16-1007,其他为保留值。 FR(config-if)#frame-relay route ? <16-1007> input dlci to be switched FR(config-if)#frame-relay route 101 interface serial 1 ? <16-1007> output dlci to use when switching FR(config-if)#frame-relay route 101 interface serial 1 202 6)重复1-5步骤,对serial 1 进行配置
7)验证配置
FR#show frame-relay pvc PVC Statistics for interface Serial0 (Frame Relay DCE)
DLCI = 101, DLCI USAGE = SWITCHED, PVC STATUS = INACTIVE, INTERFACE = Serial0
input pkts 0 output pkts 0 in bytes 0
out bytes 0 dropped pkts 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 pvc create time 00:02:08, last time pvc status changed 00:02:08 Num Pkts Switched 0 PVC Statistics for interface Serial1 (Frame Relay DCE) DLCI = 202, DLCI USAGE = SWITCHED, PVC STATUS = INACTIVE, INTERFACE = Serial1
input pkts 0 output pkts 0 in bytes 0
out bytes 0 dropped pkts 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 pvc create time 00:01:41, last time pvc status changed 00:01:41 Num Pkts Switched 0 FR#show frame-relay route
Input Intf Input Dlci Output Intf Output Dlci Status Serial0 101 Serial1 202 inactive Serial1 202 Serial0 101 inactive 3、在客户端进行配置
客户端配置相对简单 1)在该接口上封装帧中继协议 R1(config-if)#encapsulation frame-relay 2)配置LMI的类型 R1(config-if)#frame-relay lmi-type cisco 3)为该接口配置IP地址 R1(config-if)#ip address 192.168.1.101 255.255.255.0 4)为该接口配置DLCI值 R1(config-if)#frame-relay interface-dlci 101 默认情况下,IARP是开启的,只要在帧中继交换机为客户机指定了DLCI(步骤2中的第5)小步),则客户机会通过IARP自动获取DLCI值。使用这条命名不是必须的。 6)登陆另外一台作为客户端的路由器R2,重复步骤1-4. 7)查看配置 R2#show frame-relay pvc PVC Statistics for interface Serial0 (Frame Relay DTE)
DLCI = 202, DLCI USAGE = UNUSED, PVC STATUS = ACTIVE, INTERFACE = Serial0
input pkts 0 output pkts 1 in bytes 0
out bytes 30 dropped pkts 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 30 Num Pkts Switched 0 pvc create time 00:00:06, last time pvc status changed 00:00:06
R2#show frame-relay map
Serial0 (up): ip 192.168.1.101 dlci 202(0xCA,0x30A0), dynamic, broadcast,, status defined, active 显示dlci值为动态分配。 4、测试实验连通性。
在R2上ping R1 R2#ping 192.168.1.101 Type escape sequence to abort. 本文出自 51CTO.COM技术博客Sending 5, 100-byte ICMP Echos to 192.168.1.101, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 60/60/60 ms |


SHA-1
博客统计信息
热门文章
最新评论
友情链接