[c-nsp] necessity of nowadays

Sebastian Beutel sebastian.beutel at rus.uni-stuttgart.de
Wed Mar 23 07:20:46 EDT 2016

Hi List,

    i've been pondering about the real need for udld nowadays, each time it
bites me in a case of false positive. At least since we have gigabit SFPs it
became almost impossible to willfully provoke an unidirectinal link: The
physical port allready detects missing light and goes down.
    Moreover, the main use of udld (prevent unidirectional loops in an stp
topology) has also lost importance since link aggregation has replaced load
balancing via multiple or per vlan stp topologys.
    That's why i am asking myself whether udld is a residue that nowadays
causes more harm than it prevents and should therefore not be used anymore.
At least on gigabit and faster links and if there are no really dumb
media converters involved.

What do you think?


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