BGP Routing Table Report
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- Aubrey Johns
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1 BGP Routing Table Report View of the routing table between
2 Objective Analyse changes in global routing table between 2006 to 2016 Analysis is along: 1.Top 5 well connected ASNs 2.Growth of ASNs 3.Growth of Prefixes 4.Changes in across multihomed networks
3 Ranking the top connected networks
4 Networks with the highest adjacencies (IPv4) Year Rank 1 AS701 (2442) AS701 (2720) AS701 (2293) (2656) (2931) (3381) Rank 2 AS7018 (2073) AS7018 (2104) AS7018 (2217) (2476) (2908) (3205) Rank 3 AS1239 (1765) (1854) (2192) AS7018 (2294) AS7018 (2394) AS7018 (2446) Rank 4 (1612) AS1239 (1723) (2184) AS701 (2090) AS701 (1981) AS701 (1929) Rank 5 (1373) (1746) AS1239 (1631) AS1239 (1449) (1563) (1871) * Data belongs to Dec of each year
5 Networks with the highest adjacencies (IPv4) (cont.) Year Rank 1 (3747) (4135) (4489) (4783) (6029) Rank 2 (3480) (3950) (4150) (4321) (5025) Rank 3 (2612) (3190) (3513) (4173) (4680) Rank 4 AS7018 (2428) AS7018 (2431) AS7018 (2393) AS7018 (2422) AS3549 (2699) Rank 5 AS701 (1656) AS4323 (1715) AS4323 (1897) AS4323 (1895) AS7018 (2396) * Data belongs to Dec of each year
6 Year on year IPv4 peering change across the top ASNs
7 Year on Year peering changes between
8 Networks with the highest adjacencies (IPv6) Month Rank 1 AS3257 (144) AS3257 (179) (335) (659) (1106) (1576) Rank 2 AS2914 (115) AS2914 (162) AS3257 (200) AS13030 (330) AS3257 (423) (507) Rank 3 AS30071 (83) (160) AS2914 (191) AS3257 (274) AS13030 (357) (505) Rank 4 AS6175 (75) AS30071 (117) AS3549 (123) AS2914 (210) AS2914 (281) AS13030 (461) Rank 5 AS2497 (65) AS6175 (94) AS30071 (110) AS3549 (148) AS3549 (225) AS3257 (412) * Data belongs to Dec of each year
9 Networks with the highest adjacencies (IPv6) Month Rank 1 (1950) (2218) (2471) (2819) (3589) Rank 2 (737) (1047) (1221) (1341) (1548) Rank 3 (732) (973) (1044) (1146) (1276) Rank 4 AS13030 (514) AS13030 (561) AS2914 (673) AS37100 (839) AS37100 (1073) Rank 5 AS3257 (466) AS2914 (548) AS1299 (602) AS2914 (749) AS1299 (881) * Data belongs to Dec of each year
10 Year on year IPv6 peering changes across the top ASNs
11 Year on Year peering changes between
12 Growth of ASNs between
13 Year on Year growth of ASNs (IPv4) Visible ASNs in Jan 2006: Visible ASNs in Dec 2016: Average change of 14.76% (every year) for an 11 year period
14 Year on Year growth of ASNs (IPv6) Visible ASNs in Jan 2006: 590 Visible ASNs in Dec 2016: Average change of % (every year) for a 10 year period
15 Growth of IPv4 Prefixes Growth of unique IPv4 prefixes visible in the routing table between 2006 to 2016
16 Growth of IPv6 Prefixes Growth of unique IPv6 prefixes visible in the routing table between 2006 to 2016
17 IPv4 vs. IPv6 ASN Comparison
18 Growth of multi-homing
19 Comparison of growth of adjacencies Month 1 Peer 2 Peers 3 Peers 4 Peers 5 Peers Total Visible ASNs Dec Dec Dec Dec Dec Dec Dec Dec Dec Dec Dec
20 Comparison of growth of adjacencies
21 How do I get my ASN in the list?
22 How to make the internet better? Follow & promote an open peering policy Peer at Internet Exchange Points (IXPs) Start an IXP in your home region if not there already Use peeringdb to list yourself & search for others Share your routing table to public route collectors -
23 Conclusions Peering is good! Remember somewhere up the transit path there s peering More peerings = more entry & exit points in backbone gives tremendous flexibility, fewer points of failure, capacity to deal with high amounts of traffic and lot more! A large IPv4 routing table will consume more resources, very slow BGP convergence etc resulting in direct impact on networks Ironically unique IPv4 addresses not growing at the pace of internet points to ugly reality of NATed deployment in post IPv4 depletion stage IPv6 deployment by global networks needs to accelerate. Remember each IPv6 route origination carries 2^80 addresses at least
24 Considerations for the study There can be large content networks which have a very high amount of peering but not visible since neither side dumps data in public route collectors Announcements smaller than /24 in IPv4 and /48 in IPv6 are ignored This study measures adjacencies which includes all three i.e peers, upstream & downstream
25 Thankyou! Questions / Peering? anurag@he.net ASN: 6939 Web: Peeringdb:
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