exploration lan switching chapter4 update
TRANSCRIPT
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Implement VTP
LAN Switching and Wireless Chapter 4
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Objectives
Explain the role of VTP in a converged switchednetwork
Describe the operation of VTP: VTP domains, VTPModes, VTP Advertisements, and VTP Pruning.
Configure VTP on the switches in a convergednetwork.
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What is VTP?
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Large Network
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VTP (VLAN Trunking Protocol)
Before discussing VTP, it is important to understand that VTP isnot necessary in order to configure VLANs or Trunking on CiscoSwitches.
Benefits
VTP is a Cisco proprietary protocol that allows VLAN configuration tobe consistently maintained across a common administrative domain.
VTP minimizes the possible configuration inconsistencies that arisewhen changes are made.
Additionally, VTP reduces the complexity of managing and
monitoring VLAN networks, allowing changes on one switch to bepropagated to other switches via VTP.
On most Cisco switches, VTP is running and has certain defaultsalready configured.
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VTP
VTP (VLAN Trunking Protocol) is used to distribute and synchronizeinformation about VLANs that are configured throughout a switchednetwork.
Switches transmit VTP messages only on 802.1Q and ISL trunks.
Note: VTP is not required to configure trunking between switches,
but is used to simplify VLAN management. VTP Server
This is the default VTP mode.
VLANs can be created, modified, and deleted.
VTP Client
This behaves like a VTP server without the ability to create,change, or delete VLANs.
VTP Transparent
Switches in the VTP Transparent mode do not participate in VTP.
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VTP Operation
VTP advertisements are sent as multicast frames.
VTP servers and clients are synchronized to the latest revision number.
VTP advertisements are sent every 5 minutes or when there is a change.
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VTP Version
VTP has three versions, 1, 2, and 3. Only one VTPversion is allowed in a VTP domain.
The default is VTP version 1. A Cisco 2960 switchsupports VTP version 2.
A discussion of VTP versions is beyond the scope ofthis course.
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Displaying VTP Status
VTP Version-Displays the VTP version the switch is capableof running. By default, the switch implements version 1, butcan be set to version 2.
Configuration Revision-Current configuration revision
number on this switch. You will learn more about revisionsnumbers in this chapter.
Maximum VLANs Supported Locally-Maximum number ofVLANs supported locally.
Number of Existing VLANs-Number of existing VLANs.
VTP Operating Mode-Can be server, client, or transparent.
VTP Domain Name-Name that identifies the administrativedomain for the switch.
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Show VTP Status
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Default VTP Configuration
VTP automatically distributes and synchronizes domainand VLAN configurations across the network
Only add switches that are in their default VTPconfiguration.
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VTP Domains
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VTP Domains
VTP allows you to separate your network into smallermanagement domains.
A VTP domain consists of one switch or severalinterconnected switches sharing the same VTP domainname.
A switch can be a member of only one VTP domain at atime.
Until the VTP domain name is specified you cannotcreate or modify VLANs on a VTP server, and VLANinformation is not propagated over the network.
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VTP Operation - Advertisements
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VTP Modes Overview
VTP Server
This is the default VTP mode.
VLANs can be created, modified, and deleted.
VTP Client
This behaves like a VTP server without the ability tocreate, change, or delete VLANs.
VTP Transparent
Switches in the VTP Transparent mode do notparticipate in VTP.
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VTP Modes
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VTP Pruning
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VTP Pruning
VTP pruning prevents unnecessary flooding ofbroadcast information from one VLAN across all trunksin a VTP domain.
VTP pruning permits switches to negotiate whichVLANs are assigned to ports at the other end of a trunkand, hence, prune the VLANs that are not assigned toports on the remote switch.
Pruning is disabled by default. VTP pruning is enabled
using the vtp pruning global configuration command.
Pruning needs to be enabled on only one VTP serverswitch in the domain.
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VTP Pruning Enabled
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Configuring VTP
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Configuring VTP
Confirm the Details
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Configuring VTP
Configure Domain
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Configuring VTP
Add VLANs and Trunks
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Configuring VTP
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Configuring VTP
Confirm theDefaults
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Configuring VTP
Enable VTPClient Mode
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Configuring VTP
Verify VTPStatus
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Configuring VTP
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Configuring VTP
Confirm VTPOperation
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Configuring VTP
ConfigureAccess Ports
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Identify and troubleshoot common VTPconfiguration problems
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Summary
VTP is a Cisco proprietary protocol used to exchangeVLAN information across trunk links.
A switch can be in one of 3 VTP operating modes
Client - Cannot create, modify or delete VLAN
Server- Can create, modify & delete VLAN
Transparent - Can create, modify, & delete LOCAL VLAN
Forwards VTP advertisements.
VTP pruning
Limits unnecessary dissemination of VLAN information.
Verify VTP configuration
Show VTP status
Show interfaces trunk
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