Not directly related, but I wonder: how common is micro-BFD for detecting bundle member failures?
On Thu, Mar 22, 2018 at 10:12 PM Måns Nilsson <[email protected]> wrote: > > > --On 22 mars 2018 23:45:16 +0200 Saku Ytti <[email protected]> wrote: > > > On 22 March 2018 at 22:41, Måns Nilsson <[email protected]> > > wrote: > > > >> Subject: Re: How are you configuring BFD timers? Date: Wed, Mar 21, 2018 > >> at 04:24:47PM +0000 Quoting Job Snijders ([email protected]): > >>> Silly question perhaps, but why would you do BFD on dark fiber? > >> > >> Because Ethernet lacks the PRDI that real WAN protocols have. > > > > Indeed, RFI on ethernet is rather modern addition, turning 20 this year. > > (You just reminded me I've been doing some sort of WAN network ops for > about 20 years.) > > That does indeed solve the problem for dark fibre, and those lucky WDM > systems that actually reflect input status to output. Not always true, I'm > afraid (just look at the Ethernet switch mid-span that Thomas Bellman wrote > about; a fitting metaphor for all "ethernet-over-other.." models..). > Ethernet still regards "no frames seen on the yellow coax" as an > opportunity to send traffic rather than an error, if we're talking old > things ;-). BFD solves that, and it is worthwhile to have one setup > regardless of technology, if possible. > > -- > Måns Nilsson primary/secondary/besserwisser/machina > MN-1334-RIPE SA0XLR +46 705 989668 > CHUBBY CHECKER just had a CHICKEN SANDWICH in downtown DULUTH! >
