CCNA 3 Labs and Study Guide - BINARYBB.INFO – @jagalbraith

List three possible ways to reset the configuration revision number on a switch. (Only two methods are
discussed in the presentation. Can you think of another way?)
The quickest way to reset a configuration revision number is to temporarily set the VTP mode to transparent.
You could also temporarily change the domain name. A third way is to delete the vlan.dat file and
reload the switch.
Internet Research: VTP Pruning
There will be a lot of traffic on a large switched network with VLANs that span multiple switches. VTP
pruning is a method of reducing traffic. Research VTP pruning and briefly describe what it is, how it operates,
and what configuration commands, if any, you would use. Make sure to list your sources.
If the student simply enters “vtp pruning” in the Google search engine, one of the first links should be
Cisco.com. Encourage students to use the Cisco.com explanation as their primary source of information,
especially when learning about a Cisco proprietary technology like VTP. However, also encourage them to
explore third-party explanations that might come at a difficult topic from a different perspective.
The following link provides the Cisco.com discussion of VTP pruning:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_4_2/config/vlans.htm
The following links are helpful third-party sources:
http://www.certificationzone.com/cisco/newsletter/SL/nla_11-30-04_newage.html
http://www.firewall.cx/vlans-vtp-pruning.php
http://www.networknewz.com/2004/0317.html
Inter-VLAN Routing Overview
Inter-VLAN communication cannot occur without a Layer 3 device, such as a router. You will use ISL or
IEEE 802.1q to enable trunking on a router subinterface. In this section, you will briefly review the concept
of inter-VLAN routing. Then, you will work through a inter-VLAN routing configuration exercise.
Vocabulary Exercise: Completion
Chapter 9: VLAN Trunking Protocol 387
Directions: Complete the paragraphs that follow by filling in appropriate words and phrases.
Inter-VLAN communication crosses broadcast domains. When a host in one broadcast domain wishes to
communicate with a host in another broadcast domain, you must use a router. When connecting a router to
a switched network with multiple VLANs, one interface is needed per VLAN because each is on its own
logical network or subnet. You can reduce the number of physical interfaces needed to route VLANs by
using a trunk link between the switch and router. You achieve logical division of a physical interface by
implementing subinterfaces. One subinterface would be configured per VLAN. Each subinterface would
also be configured with an IP address from a separate logical subnet.