CCNP Switch - D&D - DTP Mode

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Respuestas correctas:

  1. Trunk: Set the switch port to trunk mode and negotiate to become a trunk.
  2. Nonegotiate: Specify that the DTP packets are not sent out of this interface.
  3. Access: Set a switch port to permanent nontrunking mode.
  4. Dynamic Auto: Set the switch port to respond, but not actively send DTP frames.
  5. Dynamic Desirable: Make the interface actively attempt to convert the link to a trunk link. (This means the interface is ready to autonegotiate trunking encapsulation and form a trunk link (using DTP) with a neighbor port in desirable, auto, or on mode.)

Explicación: Dynamic Trunking Protocol (DTP) is the Cisco-proprietary that actively attempts to negotiate a trunk link between two switches. Below is theswitchport modes (or DTP modes) for easy reference:

Mode Function
Dynamic Auto Creates the trunk based on the DTP request from the neighboring switch.
Dynamic Desirable Communicates to the neighboring switch via DTP that the interface would like to become a trunk if the neighboring switch interface is able to become a trunk.
Trunk Automatically enables trunking regardless of the state of the neighboring switch and regardless of any DTP requests sent from the neighboring switch.
Access Trunking is not allowed on this port regardless of the state of the neighboring switch interface and regardless of any DTP requests sent from the neighboring switch.
Nonegotiate Prevents the interface from generating DTP frames. This command can be used only when the interface switchport mode is access or trunk. You must manually configure the neighboring interface as a trunk interface to establish a trunk link.
Modificado el 3 Enero, 2015
   

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