[2580] in North American Network Operators' Group
Re: The Attitude (was: the Internet Backbone)
daemon@ATHENA.MIT.EDU (EDS@RHQVM21.VNET.IBM.COM)
Tue Apr 16 22:44:48 1996
From: EDS@RHQVM21.VNET.IBM.COM
Date: Tue, 16 Apr 96 22:32:05 EDT
To: nanog@merit.edu
> >> 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
