LAB: 6 VLAN AND VLAN TRUNKING
VLANs are created to provide the segmentation services traditionally provided by
routers in LAN configurations. A VLAN is a switched network that is logically
segmented by functions, project teams, or applications without regard to the physical
location of users. Each switch port can be assigned to a VLAN. Ports in a VLAN share
broadcasts. Ports that do not belong to that VLAN do not share these broadcasts. This
improves the overall performance of the network. Communication between VLANs is
provided by layer 3 routing.
http://www.cisco.com/univercd/cc/td/doc/product/rtrmgmt/sw_ntman/vlandir/vdir1gsg/ov
ervw.pdf
LAB: 6 Switching :
Object: Demonstrate and create a virtual LAN environment by logically
segmenting LAN traffice.
Equipment:
2 cisco 2950 switch
Console cable.
Hyperterminal for communicating with the switches.
Category 5 ethernet cables straight thru for connecting switch to PC
Category 5 ethernet cable cross-over for connecting switch to switch.
SW2 Paris
SW1 Toronto
trunk
Vlans 10,20,30
1
2
3
1
Van10
Van10
Van20
Van20
Van30
Van30
HR
HR
Sales
3
2
Sales
Warehouse
Warehouse
1
Procedure:
Configure Switch as shown below.
1. Switch# show vlan
What vlans do you see?
2. Do the following configuration on both switches.
Switch#conf gure terminal
Switch(config)#int fa0/1
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 10
Switch(config-if)# no shut
Switch(config-if)#end
Switch#configure terminal
Switch(config)#int fa0/2
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 20
Switch(config-if)# no shut
Switch(config-if)#end
Switch#configure terminal
Switch(config)#int fa0/3
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 30
Switch(config-if)# no shut
Switch(config-if)#end
3. do show run to check your configurations
4. do show interface fa0/1
is the interface up?
to configure trunk between switches do the following command
Switch#configure terminal
Switch(config)#int fa0/3
Switch(config-if)#interface fa0/24
Switch(config-if)#switchport mode trunk
Switch(config-if)#switchport trunk allowed vlan 10,20,30
2
5.
connect the PCs to switch ports.
And configure PCs interfaces as shown below.
Control panet -> network connections ->local area connection-> properties>TCP/IP
PC
Name
PC1
PC2
PC3
PC4
PC5
PC6
IP
Address
10.10.10.1
10.10.10.2
30.30.30.3
30.30.30.4
50.50.50.5
50.50.50.6
Maks
255.255.255.0
255.255.255.0
255.255.255.0
255.255.255.0
255.255.255.0
255.255.255.0
Gateway
10.10.10.2
10.10.10.1
30.30.30.4
30.30.30.3
50.50.50.6
50.50.50.5
Ping PC2, PC3, PC4 and PC5 by using PC command prompt
Where you able to ping all PCs?
Which pings were successful and why.?
Explain why vlan is good for network security.
Explain why trunk is being used in this lab
3