Day 46 Lab – VLANs and STP

Topology

Instructions

Connect to the switch using a console connection. Connect a PC to each switch, or connect the switch to the FastEthernet port on a router:

1. Add IP addresses to the PCs or router Ethernet interfaces
2. Create VLAN4 on the switches
3. Set the ports the PCs connect to as access ports (default, but do it anyway)
4. Put the two switch ports into VLAN4
5. Configure the link between the switches as trunk ports and no shut them
6. Wait about 30 seconds, at most, and then ping from PC to PC
7. Check which switch is the Root Bridge with the show spanning-tree vlan 4 command
8. Set the other switch as the Root Bridge with the spanning-tree vlan 4 priority 0 command
9. Now check to see whether the switch has become the Root Bridge
10. Remove the spanning-tree vlan 4 priority 0 command to reset the original switch as the Root Bridge (put no in front of the command)
11. Now set the other switch as the Root Bridge with the spanning-tree vlan 4 root primary command

Solution Hints and Commands

• vlan 4 to create a VLAN
• sw mode access
• sw mode trunk
• sw access vlan 4