Re: The Attitude (was: the Internet Backbone)

[EDS () RHQVM21 VNET IBM COM]

> > > and it might even be possible to enforce some interesting
> > > policies in that regard in the route servers (e.g. if you have more
> > > than N routing or BGP peer transitions per time period, the route
> > > server will refuse to peer with you for 48 hours - think of it as the
> > > hold-down or damper from Hell).
> > Interesting concept!

> Exponential backoff works well, too bad the code base that does
> route flap damping isn't really stable enough for production
> use in large parts of the Internet.
> Best results are give, when everyone runs it.

Flap dampening works on most routers- just have to be aware of what
the effects are, particularly with multiple BGP Peers.
You have to decide whether to dampen outbound and/
or inbound, and if short duration events like temporary
recalculations of the IGP are considered a "flap".

Ed Segal  EDS () RHQVM21 VNET IBM COM   914 684-3976