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Chapter 4 VTP

Chapter 4 VTP. VLAN Trunking Protocol. Allows a switch to propagate VLAN configurations to other switches in the network VLAN configuration changes are made to the VLAN server switch Changes a propagated through the network Benefits VLAN configuration consistency

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Chapter 4 VTP

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  1. Chapter 4 VTP

  2. VLAN Trunking Protocol Allows a switch to propagate VLAN configurations to other switches in the network VLAN configuration changes are made to the VLAN server switch Changes a propagated through the network Benefits VLAN configuration consistency Accurate tracking and monitoring of VLANs Dynamic reporting of added VLANs Dynamic trunk configuration when VLANs are added to the network

  3. VTP Components VTP domain Group of switches that share VLAN configurations VTP advertisements Messages sent between switches with VLAN info VTP modes Server Client Transparent VTP pruning Removing unneeded VLANs from a trunk

  4. VTP Server Default VTP mode Advertise VTP VLAN information to other VTP enabled switches in the same VTP domain Store the VLAN information for the entire domain in NVRAM VLANs can be created, deleted, or renamed for the domain

  5. VTP Client Mode must be configured Store the VLAN information for the entire domain in RAM Information lost on reset Require less NVRAM than servers VLANs cannot be created, deleted, or renamed for the domain

  6. VTP Transparent Forwards VTP advertisements Does not participate in VTP VLAN configuration local to switch VLAN configuration saved to NVRAM

  7. VTP Settings Default settings VTP version = 1 VTP domain name = null VTP mode = server Configuration revision = 0 VLANs = 1 show vtp status Display VTP settings

  8. VTP Domains Allows division of network into smaller management domains Switches with the same VTP domain name will share VLAN configurations If the VLAN domain name is not configured VLANs cannot be created or modified on a server VLAN information is not propagated over the network VTP domain name is propagated from server to clients

  9. Summary Advertisements Contain VTP domain name Current revision number Other VTP configuration details Sent every 5 minutes by VTP servers And immediately after configuration changes Majority of advertisement traffic

  10. Subset Advertisements Contain VLAN information Triggered by Creating or deleting a VLAN Suspending or activating a VLAN Changing the name of a VLAN Changing the MTU of a VLAN

  11. Request Advertisements Sent by clients Sent if VTP domain name has been changed Switch receives a summary advertisement with a higher configuration revision number than its own Subset advertisement message is missed Switch has been reset Server responds with Summary advertisement Subset advertisement

  12. VTP Pruning • Unnecessary VLANs are removed from trunks • Reduces flood traffic

  13. VTP Configuration show vtp status Confirm default VTP settings Configuration revision vtp mode {server|client|transparent} vtp domaindomain-name Domain names are case sensitive vtp passwordpassword vtp version 1 Default show vtp counters Confirm advertisements have been sent

  14. Troubleshooting VTP Common VTP configuration issues Incompatible VTP versions VTP password issues Incorrect VTP domain name All switches set to VTP client mode Configuration revision number issues

  15. The End

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