3.2.1.4 Lab - Configuring EtherChannel - ILM

18 carrier transitions dcdup dsrup dtrup rtsup ctsup

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18 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up Central# show interfaces s0/0/0 Serial0/0/0 is up, line protocol is up Hardware is WIC MBRD Serial Internet address is 10.1.1.2/30 MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, LCP Open Open: IPCP, CDPCP, loopback not set Keepalive set (10 sec) Last input 00:00:02, output 00:00:03, output hang never Last clearing of "show interface" counters 00:01:20 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max)
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Lab Configuring Basic PPP with Authentication © 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 8 of 27 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 41 packets input, 2811 bytes, 0 no buffer Received 0 broadcasts (0 IP multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 40 packets output, 2739 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 unknown protocol drops 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up Step 3: Intentionally break the serial connection. a. Issue the debug ppp commands to observe the effects of changing the PPP configuration on the Branch1 router and the Central router. Branch1# debug ppp negotiation PPP protocol negotiation debugging is on Branch1# debug ppp packet PPP packet display debugging is on Central# debug ppp negotiation PPP protocol negotiation debugging is on Central# debug ppp packet PPP packet display debugging is on b. Observe the debug PPP messages when traffic is flowing on the serial link between the Branch1 and Central routers. Branch1# Jun 20 02:20:45.795: Se0/0/0 PPP: O pkt type 0x0021, datagramsize 84 Jun 20 02:20:49.639: Se0/0/0 PPP: I pkt type 0x0021, datagramsize 84 link[ip] Jun 20 02:20:50.147: Se0/0/0 LCP-FS: I ECHOREQ [Open] id 45 len 12 magic 0x73885AF2 Jun 20 02:20:50.147: Se0/0/0 LCP-FS: O ECHOREP [Open] id 45 len 12 magic 0x8CE1F65F Jun 20 02:20:50.159: Se0/0/0 LCP: O ECHOREQ [Open] id 45 len 12 magic 0x8CE1F65F Jun 20 02:20:50.159: Se0/0/0 LCP-FS: I ECHOREP [Open] id 45 len 12 magic 0x73885AF2 Jun 20 02:20:50.159: Se0/0/0 LCP-FS: Received id 45, sent id 45, line up Central# Jun 20 02:20:49.636: Se0/0/0 PPP: O pkt type 0x0021, datagramsize 84 Jun 20 02:20:50.148: Se0/0/0 LCP: O ECHOREQ [Open] id 45 len 12 magic 0x73885AF2 Jun 20 02:20:50.148: Se0/0/0 LCP-FS: I ECHOREP [Open] id 45 len 12 magic 0x8CE1F65F Jun 20 02:20:50.148: Se0/0/0 LCP-FS: Received id 45, sent id 45, line up Jun 20 02:20:50.160: Se0/0/0 LCP-FS: I ECHOREQ [Open] id 45 len 12 magic 0x8CE1F65F Jun 20 02:20:50.160: Se0/0/0 LCP-FS: O ECHOREP [Open] id 45 len 12 magic 0x73885AF2 Jun 20 02:20:55.552: Se0/0/0 PPP: I pkt type 0x0021, datagramsize 84 link[ip] c. Break the serial connection by returning the serial encapsulation to HDLC for interface S0/0/0 on the Branch1 router. Record the command used to change the encapsulation to HDLC.
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