3.6.1 Packet Tracer – Implement VLANs and Trunking (Instructions Answer)

3.6.1 Packet Tracer – Implement VLANs and Trunking (Instructor Version)

Addressing Table

Objectives

• Part 1: Configure VLANs
• Part 2: Assign Ports to VLANs
• Part 3: Configure Static Trunking
• Part 4: Configure Dynamic Trunking

Background

You are working in a company that is getting ready to deploy a set of new 2960 switches in a branch office.

You are working in the lab to test out the VLAN and trunking configurations that are planned. Configure and test the VLANs and trunks.

Instructions

Part 1: Configure VLANs

Configure VLANs on all three switches. Refer to the VLAN Table. Note that the VLAN names must match the values in the table exactly.
VLAN Table

Switch A / Switch B / Switch C

enable
configure terminal
vlan 10
name Admin
vlan 20
name Accounts
vlan 30
name HR
vlan 40
name Voice
vlan 99
name Management
vlan 100
name Native

Part 2: Assign Ports to VLANs

Step 1: Assign access ports to VLANs

On SWB and SWC, assign ports to the VLANs. Refer to the Addressing Table.
Switch B

interface f0/1
switchport mode access
switchport access vlan 10
interface f0/2
switchport mode access
switchport access vlan 20
interface f0/3
switchport mode access
switchport access vlan 30

Switch C

interface f0/1
switchport mode access
switchport access vlan 10
interface f0/2
switchport mode access
switchport access vlan 20
interface f0/3
switchport mode access
switchport access vlan 30
interface f0/4
switchport mode access
switchport access vlan 10

Step 2: Configure the Voice VLAN port

Configure the appropriate port on switch SWC for voice VLAN functionality.
Switch C

interface f0/4
mls qos trust cos
switchport voice vlan 40

Step 3: Configure the virtual management interfaces

a. Create the virtual management interfaces, on all three switches.

b. Address the virtual management interfaces according to the Addressing Table.

c. The switches should not be able to ping each other.

SWA(config)#interface vlan 99
SWA(config-if)#ip address 192.168.99.252 255.255.255.0
SWA(config-if)#no shutdown

SWB(config)#interface vlan 99
SWB(config-if)#ip address 192.168.99.253 255.255.255.0
SWB(config-if)#no shutdown

SWC(config)#interface vlan 99
SWC(config-if)#ip address 192.168.99.254 255.255.255.0
SWC(config-if)#no shutdown

Part 3: Configure Static Trunking

a. Configure the link between SWA and SWB as a static trunk. Disable dynamic trunking on this port.

b. Disable DTP on the switch port on both ends of the trunk link.

c. Configure the trunk with the native VLAN and eliminate native VLAN conflicts if any.

SWA(config)#interface g0/1
SWA(config-if)#switchport mode trunk
SWA(config-if)#switchport nonegotiate
SWA(config-if)#switchport trunk native vlan 100

SWB(config)#interface g0/1
SWB(config-if)#switchport mode trunk
SWB(config-if)#switchport nonegotiate
SWB(config-if)#switchport trunk native vlan 100

Part 4: Configure Dynamic Trunking

a. Assume that the trunk port on SWC is set to the default DTP mode for 2960 switches. Configure G0/2 on SWA so that it successfully negotiates trunking with SWC.

b. Configure the trunk with the native VLAN and eliminate native VLAN conflicts if any.

SWA(config)#interface g0/2
SWA(config-if)#switchport mode dynamic desirable

SWC(config)#interface g0/2
SWC(config-if)#switchport mode trunk
SWC(config-if)#switchport trunk native vlan 100

Answer Scripts

Switch SWA

enaable
conf t
vlan 10
 name Admin
vlan 20
 name Accounts
vlan 30
 name HR
vlan 40
 name Voice
vlan 99
 name Management
vlan 100
 name Native
interface GigabitEthernet0/1
 switchport trunk native vlan 100
 switchport mode trunk
 switchport nonegotiate
interface GigabitEthernet0/2
 switchport trunk native vlan 100
 switchport mode dynamic desirable
interface Vlan1
 no ip address
 shutdown
interface Vlan99
ip address 192.168.99.252 255.255.255.0
end

Switch SWB

enaable
conf t
vlan 10
 name Admin
vlan 20
 name Accounts
vlan 30
 name HR
vlan 40
 name Voice
vlan 99
 name Management
vlan 100
 name Native
interface FastEthernet0/1
 switchport access vlan 10
 switchport mode access
interface FastEthernet0/2
 switchport access vlan 20
 switchport mode access
interface FastEthernet0/3
 switchport access vlan 30
 switchport mode access
interface GigabitEthernet0/1
 switchport trunk native vlan 100
 switchport mode trunk
 switchport nonegotiate
interface Vlan99
ip address 192.168.99.253 255.255.255.0
end

Switch SWC

enable
conf t
vlan 10
 name Admin
vlan 20
 name Accounts
vlan 30
 name HR
vlan 40
 name Voice
vlan 99
 name Management
vlan 100
 name Native
interface FastEthernet0/1
 switchport access vlan 10
 switchport mode access
interface FastEthernet0/2
 switchport access vlan 20
 switchport mode access
interface FastEthernet0/3
 switchport access vlan 30
 switchport mode access
interface FastEthernet0/4
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 40
 mls qos trust cos
interface GigabitEthernet0/2
 switchport trunk native vlan 100
 switchport mode trunk
interface Vlan99
ip address 192.168.99.254 255.255.255.0
end

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