[AusNOG] Small Pipe BNE/Agile issue
mmc at internode.com.au
Sun Jun 15 13:28:13 EST 2008
James Spenceley wrote:
> Yes, I do and the great thing about BGP is there are so many tools.
So many square pegs, round holes and idiots with hammers :-)
> The argument that I should have the *right* to decide where my traffic
> goes, is in no way more valid than I should have the *right* to decide
> how I get my traffic. In the end its a technical function in a router
> ... as path beats neighbour address, lpref beats AS path, specific
> route beats lpref. Everyone has the required tools to implement their
The problem with this approach is that your policy isn't more or less
valid than mine. DJH pointed that out previously. So, we come back
to - there are many tools, but just like using a lawnmower before 7am on
a Sunday morning, using them to assert that your policy is more
important than mine can be considered "not nice" in a shared environment
like an MLPA IX.
>>> I'm not asking anyone to accept >/24s just saying that it actually a
>>> very valid way to traffic engineer, some people seem to have take
>>> offense at being sent routes >/24 and if they want to filter go
>>> ahead. I'll keep my options open.
>> So, would you like a fence to sit on here James? :-)
> Ha, fair cop. So here it is in black and white. A lot of the world
> relies on AS path for path selection, or incorrectly uses local-pref.
> I think its valid that we de-aggregate to the Peering / MLPAs to
> ensure the most amount of traffic stays on the IX. If you have a bunch
> of traffic rich /24 then there is no reason you shouldn't advertise
> the /25 to get the same effect.
My experience is that deaggregation often leads to more rather than less
TE issues. Especially when you have transit providers who are IX
members - which is what started this whole debate when Skeeve complained
that we were passing on a /26 from AS4802 which meant he saw traffic via
transit (AS4739) rather than PIPE IX in BNE.
This lead to my whole issue with people deaggregating beyond /24s at
PIPE and the lack of control with MLPAs in general.
So, maybe, we should continue this debate at AUSNOG02?
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