A DTP question.

Unanswered Question
Aug 8th, 2010
User Badges:

Please, give a look at this table:

trunk – trunk                                      → trunk

trunk – access                                     → problem

trunk – dynamic desirable                      → trunk

trunk – dynamic auto                            → trunk

access – access                                    → access

access – dynamic desirable                     → access

access – dynamic auto                           → access

dynamic desirable – dynamic desirable      → trunk

dynamic desirable – dynamic auto            → trunk

dynamic auto – dynamic auto                  → access

The table should be exact and contains all possible "mode" combinations, except "nonegotiate".

I would like to know if "nonegotiate" is considered a "mode" or something else,

and if the problem the combination trunk - access causes is that the access port is not prepared

to receive a tagged frame from the trunk port and so discards the frame, in other words, if really it does not

exist any type of useful communication, also native, over that link. Thanks.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
sharma16031981 Sun, 08/08/2010 - 11:47
User Badges:


nonegotiate is not a mode for trunking but it is used to stop DTP frame negotition for that specific switchport with neighbour switch and will for the trunk unconditionally if neighbour is configured for nonegotiate or trunk.


vinod.agrahari Mon, 08/09/2010 - 01:28
User Badges:


Nonegotiation is not a mode and this is just a stat of undesirable condition to become a trunk.

Switchport always check the port to work as access or trunks to DTP and result the port as either access or trunk.


Vinod Agrahari


This Discussion