[AusNOG] NSWIX Peering

[Callum Barr]

What Mark said basically. But a good tool to use is as-stats

I'm on my phone so I can't give a link, but I'm sure you have some Google
fu to figure it out.

My $0.02.

On Wednesday, 2 December 2015, Mark Newton <newton at atdot.dotat.org> wrote:

> On 2 Dec 2015, at 2:14 PM, Shane Short <shane at short.id.au
> <javascript:_e(%7B%7D,'cvml','shane at short.id.au');>> wrote:
>
> Hijacking this a little bit, what do people actually look for when you're
> deciding what IXP you should peer with? Is it table size, traffic volume,
> or a specific peer that's on the fabric?
>
>
> Think about which metrics you pay for. It’s probably link capacity.
>
> Run netflow on your transit, get a real breakdown of %’age traffic
> source/destination by ASN.
>
> Then you can start making educated judgements about which ASNs you need to
> peer with to remove each AS-load of traffic from your transit.  “I’m paying
> $x per megabit per month for transit, I’m getting Y megabits from AS nnnn,
> so I can remove $x * Y from my transit bill if I find that AS somewhere
> else.”  Extrapolate for time based on your growth curves to see how much
> you’ll be saving at the same time next year too.  Make a spreadsheet, a row
> for each ASN, with megabit and dollar numbers next to them.
>
> Then you can look at how much it’ll cost to reach the IXs where those ASs
> congregate. Sum up the transit dollar savings for all the ASNs you think
> you can meet on peering.  If the cost of connecting the required number of
> megabits to the IX is less than the amount saved on your transit, it’s
> worth going to that IX.
>
> It should be a pretty objective business judgement based on hard numbers.
>
> Once you’ve committed to an IX, connect to as many ASs as you can. Don’t
> be too choosy: You aren’t a monopoly incumbent so you don’t need exclusive
> peering policies. Every megabit you exchange with the IX is a megabit you
> don’t have to carry on transit.
>
> You can also get a non-tangible advantage by include IXs where you can see
> ASNs you already reach on peering elsewhere: Won’t make any difference to
> your transit bill, but will probably make your connectivity more reliable.
> If you get enough savings from other ASNs to justify reaching multiple IXs,
> you can get diversity to well connected content sources at pretty minimal
> cost. That’ll bring value to your business too, in differing amounts
> heavily dependent on your business model.
>
> Remember to have enough transit capacity accommodate a failed IX: The
> traffic has to go somewhere, you don’t want to be the worst ISP in the
> world just because Equinix has a bad hair day. 95th percentile billing is
> the way to go here, carry headroom and only pay for it if you need it, and
> get automatic price reductions for each ASN you move to peering.
>
> Not rocket science, just start with hard numbers instead of wishy-washy
> feelings, and proceed rationally.
>
>
>    - mark
>
>
>

-- 
Callum Barr
me at callumb.com
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