Cap4 implementing vtp
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Transcript of Cap4 implementing vtp
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE I Chapter 6 1
Implement VTP
LAN Switching and Wireless – Chapter 4
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 2
Objectives Explain the role of VTP in a converged switched
network
Describe the operation of VTP: VTP domains, VTP Modes, VTP Advertisements, and VTP Pruning.
Configure VTP on the switches in a converged network.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 3
What Is an End-to-End VLAN?
Users are grouped into VLANs independent of physical location.
If users are moved within the campus, their VLAN membership remains the same.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 4
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 5
VTP Review
VTP (VLAN Trunking Protocol) is used to distribute and synchronize information about VLANs that are configured throughout a switched network.
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 has a 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.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 6
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.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 7
Describe the Operation of VTP
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 8
Describe the Operation of VTP: Domain
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 9
Describe the Operation of VTP: Advertisements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 10
Operation of VTP: Modes
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 11
Operation of VTP: Modes
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 12
Operation of VTP: pruning functions
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 13
Pruning Disabled Pruning Enabled
VTP Pruning Uses bandwidth more efficiently by reducing unnecessary flooded traffic
Example: Station A sends broadcast; broadcast flooded only toward any switch with ports assigned to the red VLAN
Switch(config)# vtp pruning
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 14
Configure VTP on the Switches
Switch#vlan database
Switch(vlan)#vtp v2-mode
Switch(vlan)#vtp domain cisco
Switch(vlan)#vtp {client | server | transparent}
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 15
Configure VTP on the Switches in a Converged Network Identify and troubleshoot common VTP
configuration problems
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 16
Reviewing VTP
DLSwitchA#show vtp status
VTP Version : 2
Configuration Revision : 0Configuration Revision : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs : 5
VTP Operating Mode : Server
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xB7 0x5D 0xB6 0x6D 0xE0 0xC0 0x3E 0x2E
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
Local updater ID is 10.1.1.250 on interface Vl1 (lowest numbered VLAN interface found)
Since no VLAN configurations were made, all settings will be the defaults. Notice the VTP mode is Server.
The number of existing VLANs is the five built-in (reserved) VLANs.
VLAN 1, 1002, 1003, 1004, 1005
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 17
Summary VTP is a Cisco proprietary protocol used to exchange
VLAN information across trunk links.
A switch can be in one of 3 VTP operating modesClient
Cannot create, modify or delete VLAN
Server
Can create, modify & delete VLAN
Transparent
Can create, modify, & delete LOCAL VLAN
Forwards VTP advertisements.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 18
Summary
VTP pruningLimits unnecessary dissemination of VLAN information.
Verify VTP configuration Show VTP status
Show VTP counters
Show interfaces trunk