How are you configuring BFD timers?

[surfer at mauigateway.com (Scott Weeks)]

:: For those running BFD on your land-based point-to-point links, 
:: Iâ??m interested in hearing about what factors you consider when 
:: deciding how to configure your timers and multiplier.

It has been a while since I used BFD, but I remember trying to get 
it as close to what I wanted and then fine tuning it over time.
For example, sometimes it would take down the session when I didn't 
want it to and I had to turn the knobs a bit.  So another thing to
consider is your initial design choice is likely to change over
time.

scott




--- jason+nanog at lixfeld.ca wrote:
From: Jason Lixfeld <jason+nanog at lixfeld.ca>

For those running BFD on your land-based point-to-point links, Iâ??m interested in hearing about what factors you consider when deciding how to configure your timers and multiplier.

On paper, BFD between two devices over a local or metro dark fibre or wave seems pretty trivial:  Assuming your gear can a) support echo mode b) hardware offloads echo processing c) automatically treats echos as vital and puts them into the appropriate high priority queue, then setting the timers down to their lowest possible values (3ms on some of the gear that Iâ??ve seen) and some low multiplier seems more than reasonable.  But?