The objective of this lab exercise is for you to configure VTP and trunking settings.
Configuring VTP and securing the trunk link is a vital CCNA-level skill. Rather than watch a video solution, I have provided show runs and test commands where appropriate.
This lab is suitable for both CCENT and CCNA certification exam preparation.
This lab has a difficulty rating of 7/10.
When you are ready for your certification exam, you should complete this lab in no more than 15 minutes.
Please use the following topology to complete this lab exercise:
Connect two switches together as shown above. Set the relevant hostnames and the F0/1 interfaces to trunk.
Configure SwitchA as a VTP server with the VTP domain howtonetwork.com and VTP password Cisco. Set SwitchB as a VTP client with the same VTP domain settings.
Configure the three VLANs as per the diagram.
Turn off DTP for the trunk interfaces.
Set the native VLAN on both switches to VLAN888. Shut down VLAN1 on both switches.
Permit only VLANs 10, 20, and 30 to cross the trunk link. I know we haven’t covered this yet so feel free to take a peek at the configurations. It’s a Layer 2 security step that you will need to know.
Issue relevant show commands to verify your configurations.
Many of the Layer 2 settings do not show in the show run (they are held in the vlan database). All of the commands are in the videos though if you are using these to accompany the book. You have already seen the VTP commands in previous labs. You would permit VLAN888 in the real world but don’t worry about that for this lab.
hostname SwitchA ! spanning-tree mode pvst ! interface FastEthernet0/1 switchport trunk native vlan888 switchport trunk allowed vlan10,20,30 switchport mode trunk switchport nonegotiate hostname SwitchB ! spanning-tree mode pvst ! interface FastEthernet0/1 switchport trunk native vlan888 switchport trunk allowed vlan10,20,30 switchport mode trunk switchport nonegotiate
SwitchB#show vtp status VTP Version : 2 Configuration Revision : 6 Maximum VLANs supported locally : 255 Number of existing VLANs : 8 VTP Operating Mode : Client VTP Domain Name : howtonetwork.com VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0xA7 0x6A 0x55 0x45 0xBB 0x6B 0x23 0x14 Configuration last modified by 0.0.0.0 at 3-1-93 00:19:44 SwitchB#show in trunk Port Mode Encapsulation Status Native vlan Fa0/1 on 802.1q trunking 888 Port Vlans allowed on trunk Fa0/1 10,20,30 Port Vlans allowed and active in management domain Fa0/1 10,20,30 Port Vlans in spanning tree forwarding state and not pruned Fa0/1 10,20,30 SwitchB# SwitchB#show int f0/1 switchport Name: Fa0/1 Switchport: Enabled Administrative Mode: trunk Operational Mode: trunk Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: Off Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 888 (Inactive) VLAN Name Status Ports ---- ----------------------- --------- ------------------------------- 1 default active Fa0/2, Fa0/3, Fa0/4, Fa0/5 Fa0/6, Fa0/7, Fa0/8, Fa0/9 Fa0/10, Fa0/11, Fa0/12, Fa0/13 Fa0/14, Fa0/15, Fa0/16, Fa0/17 Fa0/18, Fa0/19, Fa0/20, Fa0/21 Fa0/22, Fa0/23, Fa0/24, Gig1/1 Gig1/2 10 Sales active 20 Marketing active 30 HR active 1002 fddi-default active