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North American Network Operators Group

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Re: peering requirements (Re: DDOS anecdotes)

  • From: Roland Dobbins
  • Date: Sun Jun 24 01:32:15 2001

Which is where the IRR is supposed to come in.

Simon Lyall wrote:
> On Sat, 23 Jun 2001, Eric Oosting wrote:
> > Under what circumstances would the assumption (that an AS should always
> > advertise a route to the source address of packets it transmits) not be a
> > good one?
> Assymmetrical routing is a good one (see the reference Roland Dobbins
> posted for part of the story).
> Half the networks here are advertised out of different places from which
> the packets leave. This is mainly due to having one way satellite links.
> Sure the networks are advertised somewhere, but it's on the other side of
> the world (and to a bunch of different providers) from where we send the
> packets to you.
> Another one we have is a pop with a small link and larger link. To make
> some use out of the small link you might advertise only some networks at
> the pop. But at the same time outgoing traffic from any of the networks at
> that pop may go out that link. Sure you could prepend everything half a
> dozen times but some people ignore prepends for directly connected peers
> so this won't work (we tried it, we know).
> Another point, if people are going to have filters then they MUST have a
> quick and easy way for this filters to be changed and to propogate
> everywhere quickly. People who insist that you provide an exact list of
> what you want to advertise (with the exact prefixes) and then take a week
> to process any changes (or 12 hours for that matter) should have prices to
> match their discount level of service.
> --
> Simon Lyall.                |  Newsmaster  | Work:
> Senior Network/System Admin |  Postmaster  | Home:
> ihug, Auckland, NZ          | Asst Doorman | Web:

Roland Dobbins <> // 408.859.4137 voice

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