Peering and Network Deployment at 10G · •Thanks very much for inviting me to speak to you...
Transcript of Peering and Network Deployment at 10G · •Thanks very much for inviting me to speak to you...
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Peering and Network Deployment
at 10G
Nigel Titley
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2 22/02/10Eeasynet Ltd
Introductions
• Thanks very much for inviting me to speak to you
• Currently Head of Peering and Transit at Easynet Ltd
• RIPE NCC Board Chairman
• Peering Coordinator at British Telecom, Level 3 (Europe and Asia),
PacketExchange, and Flag Telecom
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3 22/02/10Eeasynet Ltd
Agenda
• What am I talking about?
• What is peering and why you should do it
• Peering policy – what is it?
• Peering strategy – what is it?
• Exchange points and direct peering
• Building a peering network
• Tools of the trade
• Conclusions
• Questions and Answers
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4 22/02/10Eeasynet Ltd
What is Easynet?
• UK and European ISP specialising in Corporate customers
• 1G European network: France, Germany, Italy, Belgium, Netherlands, Spain
• Local Loop unbundling in the UK (over 1000 exchanges undbundled)
• Bought by BSkyB satellite broadcaster (owned by News International)
• Over 2M domestic broadband customers and 140G of traffic
• Traffic mostly eyeballs
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5 22/02/10Eeasynet Ltd
What am I talking about?
• Peering and why you should do it
• Why Easynet invested 2.5M in building a 10G network
just for peering
• Peering tools of the trade
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6 22/02/10Eeasynet Ltd
Definition?
Peering:
• The act of one national Internet backbone provider
accepting and passing traffic from another national
provider. See NAP.
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7 22/02/10Eeasynet Ltd
Peering – what is it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
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8 22/02/10Eeasynet Ltd
Peering – what is it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
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9 22/02/10Eeasynet Ltd
Peering – what is it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
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10 22/02/10Eeasynet Ltd
Peering – what is it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
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11 22/02/10Eeasynet Ltd
Peering – what is it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
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12 22/02/10Eeasynet Ltd
Peering – what is it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
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13 22/02/10Eeasynet Ltd
Peering – what is it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
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14 22/02/10Eeasynet Ltd
Peering – what is it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
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15 22/02/10Eeasynet Ltd
So what is the problem?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
$
$ $
$
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16 22/02/10Eeasynet Ltd
Other Problems
• Latency
–Traffic may dog-leg via the US or Europe
–Especially important for peer to peer traffic or gaming
• Congestion
–Expensive international links
–Makes everything unresponsive
• Jitter (or delay variance)
–A combination of the above
–Makes VOIP and video difficult to use or unusable
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17 22/02/10Eeasynet Ltd
What do we do to fix it?
Tier 2 Tier 2
Tier 1Tier 1
Tier 3Tier 3
User User
$
$ $
$
Peering
Peering
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18 22/02/10Eeasynet Ltd
Advantages
• Tier 2 and 3 pay less transit charges (Hurrah!)
• Local traffic stays local
– Lower latency
– Less jitter
– Less chance of congestion
– Less dependency on external factors (like undersea cable breaks)
• Cooperation between ISPs
– Overall better service
– Possible moves towards a trade association
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19 22/02/10Eeasynet Ltd
Disadvantages
• Tier 1 sees less revenue (but who cares)
• Tier 2 may see less revenue (but is paying less to Tier 1)
• Management may see peering as cooperation with
potential competitors (but we all know how to manage our
management don’t we?)
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20 22/02/10Eeasynet Ltd
Policies and Strategies
• Peering Strategy
– How do I plan to achieve: reduced transit costs, increased profits, better
customer experience, world domination etc
– Private
• Peering Policy
– What do I tell people who want to peer with me?
– Should be publicly available (on your web site)
– Includes contact info
– Referred to on your PeeringDB page
– If you are a large player or are very selective then should be objective in order to
avoid problems with regulators
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21 22/02/10Eeasynet Ltd
Types of Peering Policies
• Open (we peer with anyone)
• Selective (we are a bit fussy about who we peer with)
• Restrictive (we actively discourage people from peering
with us)
• Closed (we won’t peer with anyone)
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22 22/02/10Eeasynet Ltd
How do we do it?
• Via an Internet Exchange Point
–A neutrally managed layer 2 switch
• Via direct peering
–A direct connection between two ASes
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23 22/02/10Eeasynet Ltd
Typical IXP (Physical)
Switch
ISP B
ISP C
ISP D
ISP A
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24 22/02/10Eeasynet Ltd
Typical IXP (Logical)
Switch
ISP B
ISP C
ISP D
ISP A
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25 22/02/10Eeasynet Ltd
Typical IXP (Physical with route server)
Switch
ISP B
ISP C
ISP D
ISP A
Route Server
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26 22/02/10Eeasynet Ltd
Route Server
• Typically a PC running UNIX/Linux
• Zebra or Quagga
• Sets up BGP sessions with IXP members
• Distributes routes (not traffic)
• May be mandatory or optional
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27 22/02/10Eeasynet Ltd
Typical IXP (Logical with route server)
Switch
ISP B
ISP C
ISP D
ISP A
Route Server
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28 22/02/10Eeasynet Ltd
IXP pros and cons
• Pros
– Only one connection needed
– Can be very cheap
– All potential peers immediately available (especially with route server)
– Can form the basis for cooperative ventures such as trade associations
• Cons
– Infrastructure may congest (unlikely)
– Single point of failure
– Bad traffic (broadcast storms) may disrupt peering
– Lack of flexibility (with route server)
– May be difficult to measure traffic to individual peers
– There may not be an IXP available (so create one, see PCH)
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29 22/02/10Eeasynet Ltd
Direct Peering
ISP A ISP B
ISP D
ISP C
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30 22/02/10Eeasynet Ltd
Direct peering pros and cons
• Pros
– Easy to see how much traffic is flowing to your peer
– No single point of failure
– No interference between peering session
• Cons
– Port required for each peer (expensive)
– Bringing up session needs physical installation (so tends to inhibit peering)
– Cannot share bandwidth between several peers
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31 22/02/10Eeasynet Ltd
Compromises
• Start peers on a shared infrastructure (IXP)
• Measure peering flows
• Migrate onto direct peerings when economical to do so
• Best of both worlds
• Assumes that you have the means to measure traffic
flows
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32 22/02/10Eeasynet Ltd
Why build a peering network?
• Cheaper than transit
• More control over traffic
• Traffic flows (especially if your traffic is asymmetrical)
• Ego factor
• Keep me in a job
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33 22/02/10Eeasynet Ltd
Planning
• Estimates of amount of peering traffic
– At least 20G
• Region
– US
– Europe
– Split roughly 50/50
• Target likely peers
– Content providers
– Peer to peer (other eyeballs)
• Locations
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34 22/02/10Eeasynet Ltd
Network Diagram (Europe)
Amsterdam
Frankfurt
Paris
London
New York
Ashburn
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35 22/02/10Eeasynet Ltd
Locations (Europe)
• Fairly Easy as we already had a network in Europe
• Based around IXPs
– Amsterdam (AMSIX)
– Frankfurt (DECIX)
– Paris (SFINX/PANAP/FreeIX)
• Initial Build
– 10G ring London – Amsterdam – Paris – Frankfurt
– Cisco CRSes (room to grow)
– Optics as we need them
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36 22/02/10Eeasynet Ltd
Network Diagram (US)
New York
Ashburn
Los Angeles
San Jose
Palo AltoLondon
Paris
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37 22/02/10Eeasynet Ltd
Locations (US)
• Brand New Network
• Based around IXPs
– New York (NYIIX, PAIX)
– Ashburn (Equinix)
– Los Angeles (Any2, LAIIX)
– Palo Alto (PAIX)
– San Jose (Equinix)
• Initial Build
– 10G ring New York – Ashburn – Los Angeles – San Jose
– 10G spurs to Palo Alto
– Cisco CRSes (room to grow)
– Optics as we need them
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38 22/02/10Eeasynet Ltd
US traffic growth
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39 22/02/10Eeasynet Ltd
Europe Traffic growth
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40 22/02/10Eeasynet Ltd
European Traffic growth (2)
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41 22/02/10Eeasynet Ltd
Effect on transit
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42 22/02/10Eeasynet Ltd
Savings
• Transit – Peering = 30 – 50%
• Total traffic = 140G approx
• Peering ratio approx 70%
• Latency/jitter improved
• Network available for reverse traffic FOC
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43 22/02/10Eeasynet Ltd
How to use the New Network
• Analyse traffic (probably already done as part of your
planning phase)
• Await requests to peer
• Stalk and hunt desired peers
• Bring up peerings
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44 22/02/10Eeasynet Ltd
Tools of the Trade
• Good business card file
• PeeringDB
• Arbor (or similar)
• Renesys
• Local database
• Friendly and engaging smile
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45 22/02/10Eeasynet Ltd
Business card file
• Contact details
• Phone number
• Email address
• Write things on the back (like AS number)
• May get extensive
• Review regularly (but don’t throw away cards,
peering coordinators move between companies
but keep the same job)
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46 22/02/10Eeasynet Ltd
PeeringDB
• Free!
• Incredibly useful resource
• http://www.peeringdb.com
• Guest access (guest/guest)
• Register your own account
(https://www.peeringdb.com/registration/register.php)
• Enter your own network’s details
• Easily search for details of potential peers
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47 22/02/10Eeasynet Ltd
Peering DB
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48 22/02/10Eeasynet Ltd
PeeringDB (search)
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49 22/02/10Eeasynet Ltd
PeeringDB (search results)
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50 22/02/10Eeasynet Ltd
Arbor Peakflow (or similar)
• For each router in network
– Takes netflow data
– Takes an iBGP feed
– Takes SNMP feed
• Used to determine traffic to and from a peer (or potential peer)
• For a potential peer will show the current path
• Also shows
– Traffic breakdown (by destination port)
– Traffic flowing from a peer to a peer (useful for detecting misconfigurations)
– Peering adviser mode, shows peers to aim for
– Traffic flows within network
– Historical data
• Disadvantage
– Cost (licensed per router)
– May lie to you
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51 22/02/10Eeasynet Ltd
Arbor Peakflow (example)
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52 22/02/10Eeasynet Ltd
Renesys
• http://www.renesys.com
• Historical routing topology data
• Very useful
– Debugging routing problems
– Working out routing topologies
• Peering advisor tool
• Free
– Give them a peering
– Get access to basic tools
• Pay
– Get automatic advisories of routing topology problems to feed to your NOC
– Get access to complete history
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53 22/02/10Eeasynet Ltd
AS5564 (Scotland Online)
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54 22/02/10Eeasynet Ltd
AS4589 (Easynet)
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55 22/02/10Eeasynet Ltd
Local Database
• Where do I peer
• Who do I peer with?
• How do I contact them?
• Who don’t I peer with?
• Missing peering points
• Anything else you might want to record
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56 22/02/10Eeasynet Ltd
IXP Overview
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57 22/02/10Eeasynet Ltd
Peer Search
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58 22/02/10Eeasynet Ltd
Peer details
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59 22/02/10Eeasynet Ltd
Friendly and Engaging Smile
• It helps to be friendly, but I seem to have managed to get away with
it.
• Buy drinks
• Bring tee-shirts
• Go to meetings
– RIPE
– NANOG
– APRICOT
– SANOG
– MENOG
– UKNOF
• Sponsor APRICOT meetings
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60 22/02/10Eeasynet Ltd
Conclusions
• Pleasure
– It can be a lot of fun being a peering coordinator
– Cooperation
– Meeting like minded people
– Making the internet a better place (without peering there would be no internet)
• Profit
– Peering is your markup
– Difference between the price you pay for transit and the price you charge your
customers
– More peering generally means more profit and happier customers