[c-nsp] BGP route flap damping

[Peter Rathlev]

On Thu, 2008-10-09 at 10:32 +0800, Ang Kah Yik wrote:
> > Meanwhile, can we assume (in general) that the conclusion to my
> > original post is that route flap damping is more of a "legacy
> > feature" these days and we can, to a larger extent, disregard it?

On Thu, 2008-10-09 at 10:23 +0300, xdsgrrr wrote:
> No we can't say this is a legacy feature because  ISPs still use this
> feature and  only a few small ISP is disabled this because they dont't
> have a time to read RFC and RIPE documents or for other reasons ;)) .

Like for example http://www.ripe.net/docs/ripe-378.txt, which states in
its "4.0 Recommendations":

"""
4.0 Recommendation
This Routing Working Group document proposes that with the current
implementations of BGP flap damping, the application of flap damping in
ISP networks is NOT recommended. The recommendations given in ripe-229
and previous documents [2] are considered obsolete henceforth.

If flap damping is implemented, the ISP operating that network will
cause side-effects to their customers and the Internet users of their
customers' content and services as described in the previous sections.
These side-effects would quite likely be worse than the impact caused
by simply not running flap damping at all. 
"""

It's not completely wrong to say that new installations can disregard
RFD. AFAIK it's no longer considered Best Practice.

Regards,
Peter