How are you configuring BFD timers?

Rob Shakir rjs at rob.sh
Sun Apr 22 06:05:19 UTC 2018


I'm not sure it's used by a large proportion of operators, but it is
deployed in some volume in a number of networks that I'm aware of. During
the development of implementations, we hosted inter-op testing/fixing at a
previous employer. Rolling it out had started when I moved on, but I expect
it is now across their global deployments at this point. I haven't heard
anything to say that it's causing any issues.

[I still am somewhat unable to reconcile myself with the use of BFD in this
deployment, some Ethernet OAM - seemed a reasonable per-member solution to
me, but folks have a preference for a single protocol here.]

r.

On Wed, 28 Mar 2018 at 10:15 Arie Vayner <ariev at vayner.net> wrote:

> 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 <mansaxel at besserwisser.org>
> wrote:
>
> >
> >
> > --On 22 mars 2018 23:45:16 +0200 Saku Ytti <saku at ytti.fi> wrote:
> >
> > > On 22 March 2018 at 22:41, Måns Nilsson <mansaxel at besserwisser.org>
> > > wrote:
> > >
> > >> Subject: Re: How are you configuring BFD timers? Date: Wed, Mar 21,
> 2018
> > >> at 04:24:47PM +0000 Quoting Job Snijders (job at instituut.net):
> > >>> 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!
> >
>


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