4 Replies Latest reply: Nov 7, 2018 2:47 PM by Martin RSS

    DTP trunk protocol negotiate

    stephen

      What is the point of the 'negotiate' option when it comes to deciding the actual trunking protocol (dot1q/isl)?

       

      If 2 cisco switches support both ISL and dot1q then they choose ISL, as its preferrred

       

      If only 802.1q is supported then there isnt even the option to negotiate (on most cisco switches)

       

      So why is the 'negotiate' option even there?