CPNT 253 Troubleshooting Exercise

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29 Οκτ 2013 (πριν από 4 χρόνια και 2 μήνες)

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CPNT253

Troubleshooting

Exercise

Page

1


CPNT 253

Troubleshooting Exercise

Topology


Addressing Table

Device

Interface

IP Address

Subnet Mask

Default
Gateway

R1

Fa0/
0

172.16.10.201

255.255.255.192

n/a

S
0/
0

10.0.30.1

255.255.255.252

n/a

S0/1

10.0.20.1

255.255.255.252

n/a

Lo0

209.
200.36.1

255.255.255.
224

n/a

R2

Fa0/
0

172.16.20.1

255.255.255.0

n/a

S
0/0

10.0.30.2

255.255.255.252

n/a

S
0/1

10.10.10.2

255.255.255.252

n/a

R3

Fa0/
1

172.16.30.1

255.255.255.0

n/a

S
0/0

10.10.10.2

255.255.255.252

n/a

S
0/1

10.0.20.2

255.255.255.252

n/a

PC
2

VLAN 20

DHCP

DHCP

DHCP

PC
3

VLAN 30

DHCP

DHCP

DHCP

TFTP Server

VLAN 10

172.16.10.254

255.255.
255.0

172.16.10.201

CPNT253

Troubleshooting

Exercise

Page

2


General Information:

1.

The issues incorporated in the supplied scripts are all in the domain of your
knowledge and studies to date. There are additional protocols configured such as
DHCP,

NTP and
IOS shortcuts via
aliases
. There are no issues with these protocols
but are
included to serve as an introduction and for your experimentation.

2.

Cable a network according to above

Topology. If there is a discrepancy between
supplied scripts and diagram above, the
diagram is always correct

and the
supplied scripts are incorrect.

3.

All
usernames

and
passwords

are
cisco
.

4.

Load the routers with supplied scripts (which contain errors).

5.

Scripts can be found in D2L as a zip file.

6.

Your supplied scripts are
set up for serial interfaces s0/0 and s
0/1. This may require
you to change the script
should you be using a

newer
router

(2800)

to s
0/
0/0 and
s
0/
0/1 respectively.

7.

Propose and implement solutions to network errors.

8.

Document the result.

Requirement for the network

There are issues in this network due to
incorrect configurations
. As a network
administrator,
your task is

to correct the errors
.


1.

Set the current time and date
on

R1 (It is NTP server) so that R2 and R3 will
synchronize to it.

2.

Ensure
R2 and R3’s routing table
s are

complete.
All
interfaces are
reachable

from
anywhere

and o
ptimal rout
ing is
achieved throughout
.

3.

For R1 e
nsure remote access via Telnet is
available
from 172.16.20.0/24 network
and
enter
in
to

“config” mode

to change hostname
.

4.

For R3 ensure remote access via http is available
from 172.16.10.192/26 a
nd
display
the status of
the interfaces.


5.

All passwor
ds should be encrypted in config files.

6.

CDP functiona
l on all Cisco devices.

7.

TFTP a router configuration fi
le to your TFTP server.

A great tftp server can be found
at
http://tftpd32.jou
nin.net/

Requirement for student:

1.

Using standard

troubleshooting methods, find,
document
and correct
each
error.


2.

Troubleshooting commands:


show ip protocols

show ip interface brief

show ip ospf interface brief

show ip ospf neighbor

show ip ospf

s
how cdp neighbors

CPNT253

Troubleshooting

Exercise

Page

3


show access
-
lists

debug ip routing

debug ip ospf hello


debug ppp authentication

debug ip ospf
adjacency



Problem

Router


Nature of the problem


#1

2
,3

Aaa not configured

#2

1

S0/0/1 has 3 configs


one show encapsulation and clock

2 showing ospf authentication



1,2,3

Set authentication to default on all routers(hdlc)



2,3

trong user names




3

bnable cdp




Cannot telnet
-

access list 11 has wrong amount of hosts allowed in






slan 20 30 have not been given an ip address





slan 20 is missing port fa0/4





fp addressing for s0/0/0 and 0/1 are wrong

#10

2,3

ao not have neighbor adjacency with each other

Authentication mismatch


#11

1

trong user name, need to change in order to telnet

Need to enable secret cisco for telnet

#12

1

Access list ild_ANY was not permitting http to access r3, got rid
of
log_any