. Ngắt kết nối các đường nối tiếp giữa RouterB và RouterC. Sau đây là đầu ra từ lệnh debug. Lưu ý rằng sau khi tuyến đường được tuyên bố không hợp lệ, nó đã được đặt trong holddown, và khoảng 30 giây sau đó, tuyến đường đã được dọn sạch từ bảng. | input pkts 5 output pkts 5 in bytes 520 out bytes 520 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 pvc create time 00 39 19 last time pvc status changed 00 39 19 Now let s issue an extended ping with 10 ping packtets sent each ping packet being 500 bytes. RouterB ping Protocol ip Target IP address Repeat count 5 10 Datagram size 100 500 Timeout in seconds 2 Extended commands n Sweep range of sizes n Type escape sequence to abort. Sending 10 500-byte ICMP Echos to timeout is 2 seconds Success rate is 100 percent 10 10 round-trip min avg max 256 257 260 ms The show frame pvc command will now show 15 input and output packets. This is 10 more that the last time we examined the values. Remember that our extended ping was 10 packets. Notice that the command output shows no input or output DE packets. RouterB sh frame pvc PVC Statistics for interface Serial0 0 Frame Relay DTE DLCI 200 DLCI USAGE LOCAL PVC STATUS ACTIVE INTERFACE Serial0 0 input pkts 15 output pkts 15 in bytes 5560 out bytes 5560 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 pvc create time 00 39 39 last time pvc status changed 00 39 39 Now let s do another extended ping. Ping the far-end address of RouterA at . This time we will use a datagram size of 512 bytes. RouterB ping Protocol ip Target IP address Repeat count 5 10 Datagram size 100 512 Timeout in seconds 2 Extended commands n Sweep range of sizes n Type escape sequence to abort. Sending 10 512-byte ICMP Echos to timeout is 2 seconds Success rate is 100 percent 10 10 round-trip min avg max 260 263 264 ms Now type the show frame pvc command. Notice that our input and output packets have increased by 10 from 15 to 25. Also notice that we now have 10 output DE packets. This occurred because we exceeded our 512-byte limit for non-DE frames going out of the router. RouterB sh frame pvc PVC
