Scenario Part C Verification and Questions

The INTRO exam tests you on your memory of the kinds of information you can find in the output of various show commands. Using Examples 16-5, 16-6, and 16-7 as references, answer the questions following the examples.

NOTE In the network from which these commands were captured, several administrative settings not mentioned in the scenario were configured. For example, the enable password was configured. So, the configurations might contain additional items not specifically mentioned in the instructions, but none of those impact the actual behavior of the features discussed in the scenario.

Example 16-5 Scenario Part C: R1 show and debug Output R1#show ip interface brief

Interface IP-Address OK? Method Status Protocol

Serial0

163.

1

.12.201

YES

NVRAM

up

up

Seriall

163.

1

.13.201

YES

NVRAM

up

up

Ethernet0

163.

1

.1.201

YES

NVRAM

up

up

R1#show access-lists

Standard IP access list 83

deny 163.1.3.0, wildcard bits 0.0.0.127 permit any

Example 16-6 Part C: R2 show and debug Output R2#show interface

Serial0 is up, line protocol is up Hardware is HD64570 Internet address is 163.1.12.202/25 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation HDLC, loopback not set Keepalive set (10 sec)

Last input never, output never, output hang never Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops) Conversations 0/0/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) Available Bandwidth 1158 kilobits/sec 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 1242 packets input, 98477 bytes, 0 no buffer Received 898 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 1249 packets output, 91395 bytes, 0 underruns 0 output errors, 0 collisions, 2 interface resets 0 output buffer failures, 0 output buffers swapped out 12 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up Serial1 is up, line protocol is up Hardware is HD64570 Internet address is 163.1.23.202/25

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, loopback not set Keepalive set (10 sec) LCP Open

Example 16-6 Part C: R2 show and debug Output (Continued)

Open: IPCP, CDPCP

Last input 00:00:03, output 00:00:03, output hang never Last clearing of "show interface" counters 00:00:15

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops) Conversations 0/1/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) Available Bandwidth 1158 kilobits/sec 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 1654 packets input, 90385 bytes, 0 no buffer Received 1644 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 1674 packets output, 96130 bytes, 0 underruns 0 output errors, 0 collisions, 8 interface resets 0 output buffer failures, 0 output buffers swapped out 13 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up Ethernet0 is up, line protocol is up

Hardware is MCI Ethernet, address is 0000.0c89.b170 (bia 0000.0c89.b170) Internet address is 163.1.2.202, subnet mask is 255.255.255.128 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set, keepalive set (10 sec) ARP type: ARPA, ARP Timeout 4:00:00 Last input 00:00:00, output 00:00:04, output hang never Last clearing of "show interface" counters never Queuing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 2274 packets input, 112381 bytes, 0 no buffer Received 1913 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 863 packets output, 110146 bytes, 0 underruns 0 output errors, 0 collisions, 2 interface resets 0 output buffer failures, 0 output buffers swapped out 6 transitions

R2#show ip protocol

Routing Protocol is "rip"

Sending updates every 30 seconds, next due in 6 seconds Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Redistributing: rip

Example 16-6 Part C: R2 show and debug Output (Continued)

Default version control: send version 1, receive any version Interface Send Recv Key-chain

Serial0 1 1 2

Seriall 1 1 2

Ethernet0 1 1 2

Automatic network summarization is in effect Maximum path: 4 Routing for Networks: 163.1.0.0 Routing Information Sources:

Gateway Distance Last Update

163.1.13.201 120 00:00:02

163.1.23.202 120 00:00:09 Distance: (default is 120)

Example 16-7 Part C: R3 show and debug Output

R3#show running-config

Building configuration...

Current configuration : 888 bytes !

version 12.2

service timestamps debug uptime service timestamps log uptime no service password-encryption !

hostname R3 !

enable secret 5 $1$J3Fz$QaEYNIiI2aMu.3Ar.q0Xm. !

ip subnet-zero no ip domain-lookup !

interface Serial0 ip address 163.1.13.203 255.255.255.128 no fair-queue

interface Serial1 ip address 163.1.23.203 255.255.255.128 encapsulation ppp

interface Ethernet0 ip address 163.1.3.203 255.255.255.128

router rip

Example 16-7 Part C: R3 show and debug Output (Continued) network 163.1.0.0

ip classless no ip http server line con 0 password cisco login line aux 0 line vty 0 4 password cisco login

R3#show ip arp

Protocol Address Age (min)

Internet 163.1.3.203 -

Hardware Addr Type Interface 0000.0c89.b1b0 SNAP Ethernet0

R3#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - 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 not set

163.1.0.0/16 is variably subnetted, 7 subnets, 2 masks

R 163.1.2.128/25 [120/1] via 163.1.23.202, 00:00:22, Serial1

C 163.1.3.128/25 is directly connected, Ethernet0

R 163.1.1.128/25 [120/1] via 163.1.13.201, 00:00:28, Serial0

R 163.1.12.128/25 [120/1] via 163.1.13.201, 00:00:28, Serial0 [120/1] via 163.1.23.202, 00:00:22, Serial1

C 163.1.13.128/25 is directly connected, Serial0

C 163.1.23.128/25 is directly connected, Serial1

C 163.1.23.202/32 is directly connected, Serial1

R3#trace 163.1.13.203

Type escape sequence to abort.

Example 16-7 Part C: R3 show and debug Output (Continued) Tracing the route to 163.1.13.203

1 163.1.13.201 16 msec 16 msec 16 msec

R3#ping 163.1.13.203

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 163.1.13.203, timeout is 2 seconds: !!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 64/66/68 ms

Answer the following questions. Use Examples 16-5, 16-6, and 16-7 as references:

1. What command tells you the contents of the ARP cache?

2. What command is used to find the path a packet would take from R3 to 163.1.1.1?

3. Imagine that R3's E0 interface needs to use a new IP address and mask (10.1.1.1, 255.255.255.0). If the user is in user mode, what steps are necessary to change the IP address?

4. If an exec command that you cannot recall begins with the letter C, how can you get Help to list all commands that start with C? List the steps, assuming that you are in privileged mode.

5. Name the two commands to list the currently used configuration in a router.

6. Name the two commands to list the configuration that will be used the next time the router is reloaded.

7. What does CDP stand for?

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