The Attitude (was: the Internet Backbone)

Wed Apr 17 02:32:05 UTC 1996

> >> 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 at RHQVM21.VNET.IBM.COM   914 684-3976