监测清单8-2配置静态路由并测试连通性 R2#conft Enter configuration commands, one per line. End with CNTL/Z. R2(config)#ip route 192.168.LO 255.255.255.0 172.16.1.1 R2(config)# Term_Server#1 [Resuming connection 1 to R1 ...] R1#conft Enter configuration commands, one per line. End with CNTL/Z. R1(config)#ip route 0.0.0.0 0.0.0.0 172.16.1.2 R1(config)#^Z R1#ping R1#ping 192.168.2.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds: !!!!! R1#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, 0 - 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, E - EGP i - IS-IS, 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 172.16.1.2 to network 0.0.0.0 172.16.0.0/24 is subnetted, 1 subnets C 172.16.1.0 is directly connected, Serial0 S* 0.0.0.0/0 [1/0]via 172.16.1.2 (1)在R2上配置目标网段为192.168.1.0/24的静态路由。 (2)在R1上配置1条缺省路由。这只是演示上的目的，完全可以配置成为和R2一样的静态路由。 (3)查看R1的路由表，显示了缺省路由的配置情况。 (4)从R1到192.168.2.1地址的ping测试是成功的，这标志着本实验的配置任务已经完成。
R1#debug frame-relay ? dlsw Frame Relay dlsw end-to-end Frame-relay end-to-end VC information events Impoftant Frame Relay packet events foresight Frame Relay router ForeSight support hPR Frame Relay APPN HPR ip Frame Relay Internet Protocol llc2 Frame Relay llc2 lmi LMI packet exchanges with service provider packet Frame Relay packets ppp PPP over Frame Relay rsrb Frame Relay rsrb
verbose Frame Relay
R1#debug frame-relay packet Frame Relay packet debugging is on R1#ping 192.168.2.1
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds: !!!!! SUCcess rate is 100 percent (5/5), round-trip min/avg/max = 68/68/72 ms R1# 00:44:29: Serial0(o): dici 102(0x1861), pkt type 0x800(IP). datagramsize 104 00:44:29: Serial0(i): dici 102(0x1861),pkt type 0x800, datagmmsize 104 00:44:29: Serial0(o):dlci 102(0x1861), pkt type 0x800(IP). datagramsize 104 00:44:29: Serial0(i):dlci 10(0x1861),pkt type 0x800, datagmmsize 104 00:44:29: Serial0(o):dlci 102(0x1861), pkt type 0x800(IP). datagramsize 104 00:44:29: SerialO(i):dlci 102(0x1861),pkt type 0x800, datagmmsize 104 00:44:29: SerialO(o):dlci 102(0x1861), pkt type 0x800(IP). datagramsize 104 00:44:29: Serial0O(i):dlci 102(0x1861),pkt type 0x800, datagmmsize 104 00:44:29: Serial0(o):dlci 102(0x1861),pkt type 0x800(IP). datagramsize 104 00:44:29: Serial0(i):dlci 102(0x1861), pkt type 0x800, datagmmsize 104 R1#conf t Enter configuration commands, one per line. End with CNTL/Z. R1(config)#int sO R1(config-if)#no frame map ip 172.16.L2 102 cisco R1(config-if)#^Z R1#sh frame map
R1#ping 192.168.2.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
00:45:19: Serial0:Encaps failed-no map entry link 7(IP). 00:45:21: Serial0:Encaps failed-no map entry link 7(IP). 00:45:23: Serial0:Encaps failed-no map entry link 7(IP). 00:45:25: Serial0:Encaps failed-no map entry link 7(IP). 00:45:27: Serial0:Encaps failed-no-map entry link 7(IP). Success rate is 0 percent (0/5) R1#undebug all All possible debugging has been turned off (1)debug frame-relay?命令列出了所有帧中继的Debug命令，其中最常用的是加阴影的几项。 (2)debug frame-relay packct命令可以监测帧中继包传输的情况。在打开监测之后，使用ping指令造成帧中继包的收发。 (3)可以看到有10行监测信息出现，仔细观察发现是最初2行信息重复出现了5次，这是因为ping指令发出了5个ICMP包，并收到了5个ICMP应答包，"Serial0(o)和"SerialO(i)"说明了发出(out)和接收(in)的方向。 (4)为测试的目的，把原先定义的帧中继映射删除。sh frame map命令的执行结果显示当前无任何帧中继映射存在。 (5)再次使用ping指令试图生成帧中继的包，监测结果为: Serial0:Encaps failed--no map entry link 7(IP) 表明包的封装失败，原因是没有MAP入口项，即没有对应的帧中继映射存在。
