Cap4   implementing vtp
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  • Emphasize: VTP prunning provides optimized flooding. Without VTP prunning, station A’s broadcast will be flooded to all switches whether they have any port in the red VLAN or not. Note: VLAN1 can’t be prunned. STP, CDP, VTP updates are sent on VLAN1. All switches in the switched network must support prunning or prunning will be disabled. Each trunk port maintains a state variable per VLAN indicating if the switch has any port assigned to a particular VLAN or not.
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Cap4 implementing vtp Presentation Transcript

  • 1. Implement VTP LAN Switching and Wireless – Chapter 4
  • 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.
  • 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 .
  • 4.  
  • 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.
  • 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.
  • 7. Describe the Operation of VTP
  • 8. Describe the Operation of VTP: Domain
  • 9. Describe the Operation of VTP: Advertisements
  • 10. Operation of VTP: Modes
  • 11. Operation of VTP: Modes
  • 12. Operation of VTP: pruning functions
  • 13. 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
    Pruning Disabled Pruning Enabled
  • 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}
  • 15. Configure VTP on the Switches in a Converged Network
    • Identify and troubleshoot common VTP configuration problems
  • 16. Reviewing VTP
    • DLSwitchA# show vtp status
    • VTP Version : 2
    • Configuration 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 at 0-0-00 00:00:00
    • Local updater ID is 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
  • 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 modes
      • Client
        • Cannot create, modify or delete VLAN
      • Server
        • Can create, modify & delete VLAN
      • Transparent
      • Can create, modify, & delete LOCAL VLAN
      • Forwards VTP advertisements.
  • 18. Summary
    • VTP pruning
      • Limits unnecessary dissemination of VLAN information.
    • Verify VTP configuration
      • Show VTP status
      • Show VTP counters
      • Show interfaces trunk