Re: BCP38 - Internet Death Penalty

[William Herrin <bill () herrin us>]

On Fri, Mar 29, 2013 at 8:36 AM, Adam Vitkovsky <adam.vitkovsky () swan sk> wrote:
> > If the best route you pick for the customer's advertisement goes to your
> upstream instead of your customer, you won't advertise it to your peer.
> > And if your customer sets a BGP community defined to mean "don't advertise
> to peers" then you won't advertise it to the peer.
> > Yet they may well transmit packets to you for which delivery to that peer
> is directed by your routing table.
>
> Yes asymmetric routing would kill the update-based urpf unless there would
> be an informational urpf NRLI we could use for these purposes

Hi Adam,

If we go down that path, let's not overload BGP. A distinct source
address advisory protocol could have highly desirable auto-aggregation
and update rate characteristics versus BGP.

Regards,
Bill Herrin


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William D. Herrin ................ herrin () dirtside com  bill () herrin us
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