[Noisebridge-discuss] general question about wifi and packet loss

[John Magolske]

At a café I find an audio stream keeps dropping off. Wondering about
the quality of the net connection, I used the mtr command and am
trying to make sense of it's output (pasted below). Does this mean
packets are being dropped at every hop, all the way back to Google?

Some days at this café most everything in the "Loss%" column is right
around 0% (and net radio streams fine), other days it's all in the
30-40% range or higher. Could it be a poor connection here at the
café? Too many users streaming high bandwidth video? Or just the
variable quality of Comcast?

Thanks for any elucidation,

John


**


% mtr google.com
                                                                                       Packets
 Host                                                 Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. DD-WRT                                            30.6%    49    1.2  65.2   1.1 608.7 119.8
 2. ???
 3. te-7-2-ur02.sffolsom.ca.sfba.comcast.net          36.7%    49   91.9  62.7   9.1 527.8 107.6
 4. te-0-10-0-2-ar01.oakland.ca.sfba.comcast.net      28.6%    49   43.2  91.4  10.5 1002. 195.3
 5. pos-0-6-0-0-cr01.sacramento.ca.ibone.comcast.net  36.7%    49   12.8  95.0  11.9 953.3 192.7
 6. pos-0-8-0-0-cr01.sanjose.ca.ibone.comcast.net     32.7%    49   16.1 106.1  16.0 918.5 176.4
 7. xe-10-1-0.edge1.SanJose1.Level3.net               36.7%    49   14.7 108.7  14.7 866.1 164.5
 8. vlan99.csw4.SanJose1.Level3.net                   38.8%    49   19.3 116.6  16.9 821.9 164.5
 9. ae-92-92.ebr2.SanJose1.Level3.net                 38.8%    49   17.7 101.4  17.5 760.5 149.7
10. ae-7.ebr1.Seattle1.Level3.net                     35.4%    48  223.6 118.1  30.6 734.3 142.4
11. ae-11-51.car1.Seattle1.Level3.net                 35.4%    48  273.6 119.3  30.0 666.8 135.1
12. GOOGLE-INC.car1.Seattle1.Level3.net               39.6%    48  139.1 124.5  60.8 639.1 118.2
13. 209.85.249.34                                     31.2%    48  117.3 126.5  33.4 614.3 147.6
14. 209.85.249.16                                     39.6%    48   91.7 133.9  63.7 598.0 140.4
    209.85.250.126
15. 209.85.250.144                                    35.4%    48   66.6 131.7  40.6 545.4 136.5
    72.14.239.12
    216.239.48.34
16. 64.233.174.127                                    37.5%    48  122.2 133.8  39.5 541.2 145.1
    64.233.174.103
    64.233.174.125
    64.233.174.101
    216.239.48.32
17. 216.239.46.6                                      39.6%    48  107.9 126.2  40.3 467.4 110.3
    216.239.46.22
    216.239.46.2
    216.239.48.133
    216.239.46.18
18. pz-in-f100.google.com                             47.9%    48   49.0 113.0  39.9 692.7 153.8
    64.233.174.103


-- 
John Magolske
http://B79.net/contact