[AusNOG] Twitter Routing

Nathan Brookfield nathan.brookfield at serversaustralia.com.au
Mon Apr 30 14:37:10 EST 2012 

We see our direct path straight to the US :-) From our Primary Network:

nathan at bdr01:~$ show ip bgp 199.59.148.10
BGP routing table entry for 199.59.148.0/22
Paths: (3 available, best #1, table Default-IP-Routing-Table)
  Advertised to non peer-group peers:
  103.1.109.12 223.25.113.124
  4826 4826 13414, (aggregated by 13414 199.16.159.247)
    114.31.200.229 from 114.31.200.229 (114.31.192.3)
      Origin IGP, metric 0, localpref 150, valid, external, best
      Community: 4826:5903 4826:6560
      Last update: Tue Apr 24 16:48:36 2012

  9942 7545 7545 6453 13414, (aggregated by 13414 199.16.159.247)
    125.254.43.9 from 125.254.43.9 (203.194.27.161)
      Origin IGP, localpref 150, valid, external
      Community: 55707:9942
      Last update: Thu Apr 26 16:28:53 2012

  10143 2914 2914 3356 13414, (aggregated by 13414 199.16.159.247)
    220.233.196.97 (metric 20) from 223.25.112.5 (223.25.112.5)
      Origin IGP, localpref 150, valid, internal
      Community: 55707:10143
      Last update: Wed Apr 25 19:33:02 2012

nathan at bdr01:~$ traceroute 199.59.148.10
traceroute to 199.59.148.10 (199.59.148.10), 30 hops max, 60 byte packets
 1  pos-1-0.fintel-bdr.vocus.net.au (114.31.200.229)  0.213 ms  0.207 ms
0.199 ms
 2  ten-1-1-0.cor01.syd03.nsw.VOCUS.net.au (114.31.192.208)  156.216 ms
156.211 ms  156.348 ms
 3  pos-0-0-0.bdr01.sjc01.ca.VOCUS.net.au (114.31.199.44)  155.836 ms
155.837 ms  155.829 ms
 4  pos-0-1-1.bdr01.pao01.ca.VOCUS.net.au (114.31.199.123)  156.102 ms
156.097 ms  156.088 ms
 5  paix1.cr1.pao1.twttr.com (198.32.176.123)  156.275 ms  156.271 ms
156.262 ms
 6  xe-0-0-0.smf1-er2.twttr.com (199.16.159.33)  163.130 ms
xe-10-0-0.smf1-er1.twttr.com (199.16.159.49)  161.147 ms  161.225 ms
 7  r-199-59-148-10.twttr.com (199.59.148.10)  161.216 ms  160.518 ms
160.611 ms
nathan at bdr01:~$

Or from our Broadband Network:

nathan at bdr03:~$ show ip bgp 199.59.150.7
BGP routing table entry for 199.59.148.0/22
Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Not advertised to any peer
  9482 3356 13414, (aggregated by 13414 199.16.159.247)
    202.62.152.25 from 202.62.152.25 (202.62.144.22)
      Origin IGP, metric 1000, localpref 100, valid, external, best
      Community: 3356:3 3356:22 3356:100 3356:123 3356:575 3356:2011
      Last update: Sun Apr 22 17:28:22 2012

nathan at bdr03:~$ traceroute 199.59.150.7
traceroute to 199.59.150.7 (199.59.150.7), 30 hops max, 60 byte packets
 1  bdr01-pfn.syd01.nsw.mybroadband.com.au (202.62.152.25)  7.713 ms  8.073
ms  8.048 ms
 2  bdr01.sjc01.ca.plat.net.au (14.137.192.249)  205.636 ms  205.976 ms
205.929 ms
 3  ge-7-42.car4.SanJose1.Level3.net (4.71.114.241)  206.314 ms  206.312 ms
206.292 ms
 4  ae-43-90.car3.SanJose1.Level3.net (4.69.152.197)  207.078 ms  206.894 ms
207.259 ms
 5  TWITTER-INC.car3.SanJose1.Level3.net (4.71.113.194)  207.472 ms  207.423
ms  207.400 ms
 6  xe-0-0-0.smf1-er1.twttr.com (199.16.159.37)  209.410 ms  209.777 ms
209.677 ms
 7  r-199-59-150-7.twttr.com (199.59.150.7)  210.413 ms  213.186 ms  212.195
ms
nathan at bdr03:~$

-----Original Message-----
From: ausnog-bounces at lists.ausnog.net
[mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Chris - Pike IT
Services
Sent: Monday, 30 April 2012 2:29 AM
To: Scott Howard; Martin Hepworth
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Twitter Routing

Thanks for the info so far everyone. 

Based on some more research, the routing I would have expected is
telstra.net > telstraglobal.net > level3.net > twttr.com

A traceroute to the Level3 peering point with Twitter routes direct to USA
from my connection:

5  14ms   22ms   22ms   bundle-ether15.ken43.sydney.telstra.net
[110.142.193.141]
 6  18ms   22ms   22ms   bundle-ether9.ken-core4.sydney.telstra.net
[203.50.11.30]
 7  16ms   16ms   15ms   bundle-ether1.pad-gw2.sydney.telstra.net
[203.50.6.29]
 8  31ms   13ms   13ms   tengige10-0-0.sydp-core02.sydney.reach.com
[203.50.13.94]
 9  150ms  150ms  150ms  i-0-3-0-0.paix-core01.bx.telstraglobal.net
[202.84.140.9]
10  185ms  185ms  185ms  i-0-5-1-0.sydp-core05.bx.telstraglobal.net
[202.84.140.30]
11  183ms  183ms  184ms  i-3-2.eqnx02.bi.telstraglobal.net [202.84.251.42]
12  151ms  176ms  151ms  l3-peer.eqnx02.pr.telstraglobal.net
[134.159.62.198]
13  200ms  200ms  200ms  ae-43-90.car3.sanjose1.level3.net [4.69.152.197]
14  223ms  222ms  221ms  twitter-inc.car3.sanjose1.level3.net [4.71.113.194]

I got the last hop from using the Level3 LG as it was the last hop before
the twttr.com network.

1 ae-43-90.car3.SanJose1.Level3.net (4.69.152.197) 0 msec
    ae-13-60.car3.SanJose1.Level3.net (4.69.152.5) 0 msec
    ae-23-70.car3.SanJose1.Level3.net (4.69.152.69) 0 msec
  2 TWITTER-INC.car3.SanJose1.Level3.net (4.71.113.194) 0 msec 0 msec 0 msec
  3 xe-0-0-0.smf1-er1.twttr.com (199.16.159.37) [AS13414 {FIRSTNET-NETWORK}]
4 msec 0 msec
    ae50.smf1-er2.twttr.com (199.16.159.53) [AS13414 {FIRSTNET-NETWORK}] 4
msec
  4 r-199-59-148-82.twttr.com (199.59.148.82) [AS13414 {FIRSTNET-NETWORK}] 4
msec 4 msec 8 msec

Regards,

Chris Pike
Pike IT Services

Mobile: +61 458 068 854 
Web: www.pikeitservices.com.au 


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