North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: peering requirements (Re: DDOS anecdotes)
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: [email protected] > Senior Network/System Admin | Postmaster | Home: [email protected] > ihug, Auckland, NZ | Asst Doorman | Web: http://www.darkmere.gen.nz -- ------------------------------------------------------------ Roland Dobbins <[email protected]> // 408.859.4137 voice
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