Lab 2
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NSSA 241 Lab 2 – Introduction to Switching - Netlab
Name: Gabriel Arias Lacruz
These questions are to be answered based on the lab experience and are due before the drop box
closes. Use this report template to answer all questions accurately, typed, and with computer
generated diagrams, if and where applicable.
Report Templates, including empty tables, must
remain unchanged with the exception of (1) an author’s name, (2) tables filled in and (3) answers to
each question in place of the following:
<Replace this line with the answer using as much space as required>
Activity 1 (6 points) – Construct Basic Single Switch Network
1.
Record the MAC and IP address for each PC on the bench in the table below.
IP Address
MAC Address
PC1/4
192.168.100.84
00-68-EB-BC-35-46
PC2/5
192.168.100.85
EC-B1-D7-45-0F-73
PC3/6
192.168.100.86
00-68-EB-BC-3A-2F
Activity 3 – (6 points) - Exploring the Switch Source Address Table
2.
Record the SAT entries in the table below. Explain step by step how this SAT table was built
considering the messages (pings) that have been sent on your network. In other words, how
did the entries get added to the table?
Switch Port
PC Mac Address
PC Name (PC1, PC2,
PC3 etc.)
Gil/0/41
0068.ebbc.3546
PC 4
Gil/0/45
0065.ebbc.3a2f
PC 6
Gil/0/43
ecb1.d745.0f73
PC 5
The SAT entries were populated when PC 4 and PC 6 pinged PC 5. When a device on the network
communicates with another device, the switch records the MAC address of the sending device along
with the corresponding switch port in its SAT.
2205 –SPH/SPM
Page 1
NSSA 241 Lab 2 – Introduction to Switching - Netlab
Activity 4 (12 points) – Examining Switched Traffic Flow
3.
Use the table below to identify the ping results and explain why each ping is visible or not
on each segment. Be sure to reference the switch SAT in your answer.
Wireshark
observing
from
Is ping
visible
(yes/no)
Explain why the ping is visible or not
PC 1/4
Yes
PC 4 is pinging PC 5 on a switch therefore you will see the traffic
PC 2 /5
Yes
PC 5 is being pinged by PC 4 on a switch therefore you will see
the traffic
PC 3 /6
no
Information between two computers cannot be shared on the
third computer, because the computers are connected by a
switch not a hub.
Activity 6 (26 points) – Layer 2 Traffic Flow with Multiple Switches Expanded
4.
Record the current contents of both switch SATs. Use more or fewer lines as necessary.
Include all dynamic entries.
Switch 1 (PCs 1-3)
Switch Port
PC Mac Address
PC Name (PC1, PC2,
PC3 etc.)
Gil/0/12
001d.7148.7a8b
Switch F
Gil/0/12
Ecb1.d740.d9f2
PC 2
Gil/0/45
0068.ebbc.3a2f
PC 6
Gil/0/12
0068.ebbc.3546
PC 4
Gil/0/43
Ecb1.d745.0f73
PC 5
Switch 2 (PCs 4-6)
Switch Port
PC Mac Address
PC Name (PC1, PC2,
PC3 etc.)
Gil/0/11
001d.46f4.dc8c
Switch E
Gil/0/11
0068.ebbc.3a2f
PC 6
Gil/0/2
Ecb1.d740.d9f2
PC 2
Gil/0/11
Ecb1.d745.0f73
PC 5
Gil/0/17
0068.ebbc.3546
PC 4
5.
Explain what is different from the previous experiment with only your single bench switch
and why. Consider what the switch may be doing as a result of the reconfiguration (see list
2205 –SPH/SPM
Page 2
NSSA 241 Lab 2 – Introduction to Switching - Netlab
above). Are the entries for MAC addresses other than the PCs? If so, explain what devices
they are for and why they are needed.
The SAT entries were populated at the moment of both PC4 and PC6 pinging PC5. When a device
on the network communicates with another device, the switch records the MAC address of the
sending device along with the corresponding switch port in its SAT. Data has to go through the
port that the opposing switch is connected from, which is why the PCs on the opposite bench
have the same switch port as the port to the switch.
6.
Use the table below to identify each of the ping results and explain why each is visible or not
on each segment. Be sure to reference the switch SAT in your answer.
PC5 pings
PC6
Wireshark
observing
from
Is ping
visible
(yes/no)
Explain why the ping is visible or not
PC 4
no
Not part of connection between PC 5 AND 6
PC 5
yes
Part of connection and ping to PC 6
PC 6
yes
Part of connection and was pinged by PC 5
PC 2
no
Not part of connection between PC 5 AND 6
PC 4
no
Not part of connection between PC 5 AND 6
PC 5
yes
Part of connection and ping to PC 6
Activity 7 (25 points) – Pinging Across Switches
7.
Record the SAT entries on both switches in the tables below. Use more or fewer lines as
needed. Include all dynamic entries. Are there entries for MAC addresses other than the
PCs? If so, include them.
What device(s) are they for?
Switch 1 (PCs 1-3)
Switch Port
PC Mac Address
PC Name (PC1, PC2,
PC3 etc.)
Gil/0/12
001d.7148.7a8b
Switch F
Gil/0/12
Ecb1.d740.d9f2
PC 2
Gil/0/45
0068.ebbc.3a2f
PC 6
Gil/0/12
0068.ebbc.3546
PC 4
Gil/0/43
Ecb1.d745.0f73
PC 5
Switch 2 (PCs 4-6)
Switch Port
PC Mac Address
PC Name (PC1, PC2,
PC3 etc.)
Gil/0/11
001d.46f4.dc8c
Switch E
2205 –SPH/SPM
Page 3
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NSSA 241 Lab 2 – Introduction to Switching - Netlab
Gil/0/11
0068.ebbc.3a2f
PC 6
Gil/0/2
Ecb1.d740.d9f2
PC 2
Gil/0/11
Ecb1.d745.0f73
PC 5
Gil/0/17
0068.ebbc.3546
PC 4
Explain
what is different
from the previous experiment with only your single bench switch
and
why
.
The differences from the previous experiment are due to the addition of a second switch and
the MAC addresses associated with the switches themselves. Switches maintain their own
MAC address tables to efficiently forward traffic, and these entries have been added. Data
has to go through the port that the opposing switch is connected from, which is why the PCs
on the opposite bench have the same switch port as the port to the switch.
8.
Use the table below to identify the ping results and explain why they are visible or not on
each segment. Be sure to reference the switch SAT in your answer.
PC2 pings
PC6
Wireshark
observing
from
Is ping
visible
(yes/no)
Explain why the ping is visible or not
PC 4
no
No, because it's not part of the connection between PC 2 and PC 6.
PC 5
no
No, because it's not part of the connection between PC 2 and PC 6.
PC 2
yes
Yes, because it's part of the connection, and PC 2 pings PC 6.
PC 6
yes
Yes, because it's part of the connection, and PC 2 pings PC 6.
Activity 8 (25 points) – Move a Host from One Switch to the Other
9.
Record the SAT entries on both switches in the tables below. Use more or fewer lines as
needed. Include all dynamic entries. Are there entries for MAC addresses other than the
PCs? If so, include them.
What device(s) are they for?
Switch 1 (PCs 1-3 and 5)
Switch Port
PC Mac Address
PC Name (PC1, PC2,
PC3 etc.)
Gil/0/12
001d.7148.7a8b
Switch F
Gil/0/45
0068.ebbc.3a2f
PC 6
Gil/0/21
0068.ebbc.3546
PC 4
2205 –SPH/SPM
Page 4
NSSA 241 Lab 2 – Introduction to Switching - Netlab
Switch 2 (PCs 4 and 6)
Switch Port
PC Mac Address
PC Name (PC1, PC2,
PC3 etc.)
Gil/0/11
001d.46f4.dc8c
Switch E
Gil/0/11
0068.ebbc.3a2f
PC 6
Gil/0/11
0068.ebbc.3546
PC 4
Explain
what is different
from the previous experiment before PC5 moved
and why
.
In the previous experiment before moving PC 5, PC 5 was connected to Switch 2, and its
MAC address was associated with that switch. After moving PC 5 to Switch 1, the MAC
address of PC 5 is now associated with Switch 1. This change in the physical location of PC 5
has resulted in changes to the SAT entries in both switches.
.
10.
Use the table below to identify the ping results and explain why they are visible or not on
each segment. Be sure to reference the switch SAT in your answer.
PC2 pings
PC5
Wireshark
observing
from
Is ping
visible
(yes/no)
Explain why the ping is visible or not
PC 4
no
No, because it's not part of the connection between PC 2 and PC
6.
PC 5
no
No, because it's not part of the connection between PC 2 and PC
6.
PC 2
yes
Yes, because it's part of the connection, and PC 2 pings PC 6.
PC 6
yes
Yes, because it's part of the connection, and PC 2 pings PC 6.
2205 –SPH/SPM
Page 5
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