On 21-dec-04, at 9:16, Jerry Pasker wrote:
IF there's a connection problem, or implementation difference that
makes a lot of up/down, then dampening could occur close to the
"problem" but it will be contained close, and won't spread to the rest
of the internet.
Today's AS hierarchy is quite flat
Well, a particular router doesn't get to set its dampening according
to its 'view' today, and that view is going to vary depending on
prefix.
I would like to argue that how we define flapping today is simply a
broken concept. We count up/down/path change transitions, but such
transitions can
An even more important consideration is whether our current paradigm
of flap dampening actually is the behavior that we want to penalize.
If a single link bounces just once, then thanks to our mesh,
confederations, differing MRAI's etc., we can see many many changes
to the AS path, resulting i
Jerry,
> >
> > i've been wondering, since most people aren't using a
> >25xx class router for bgp anymore, and the forwarding planes
> >are able to cope more when 'bad things(tm)' happen, what the value
> >of dampening is these days.
> >
> > ie: does dampening cause more problems than it
On Thu, Dec 16, 2004 at 11:43:12PM -0500, Jared Mauch wrote:
> On Fri, Dec 17, 2004 at 12:42:21AM +0100, Iljitsch van Beijnum wrote:
> >
> > On 17-dec-04, at 0:21, Jerry Pasker wrote:
> >
> > >> ie: does dampening cause more problems than it tries to solve/avoid
> > >>these days.
> >
> > >I do
On Fri, Dec 17, 2004 at 12:42:21AM +0100, Iljitsch van Beijnum wrote:
>
> On 17-dec-04, at 0:21, Jerry Pasker wrote:
>
> >>ie: does dampening cause more problems than it tries to solve/avoid
> >>these days.
>
> >I don't know what takes more router resources; dampening enabled
> >doing the
On 17-dec-04, at 0:21, Jerry Pasker wrote:
ie: does dampening cause more problems than it tries to solve/avoid
these days.
I don't know what takes more router resources; dampening enabled
doing the dampening calculations, or no dampening and constantly
churning the BGP table. I would a
i've been wondering, since most people aren't using a
25xx class router for bgp anymore, and the forwarding planes
are able to cope more when 'bad things(tm)' happen, what the value
of dampening is these days.
ie: does dampening cause more problems than it tries to solve/avoid
these da
On Thu, Dec 16, 2004 at 01:43:25PM -0800, Bill Woodcock wrote:
>
> > If both anycast routes converges to the same broken pod
> somehow(damping?).
> > And troublshooting that when it only happens in AS sounds like it
> > would be a bit more difficult.
>
> That's not an anycast pr
