[wplug] Verizon vs Comcast
Ray Connolly
rconnolly at pspmetrics.com
Tue Feb 11 08:24:02 EST 2014
Those Cogentco times on the second traceroute log are worrisome; but in both logs, the response times for the CMU network were lagging. I would send the logs onto the CMU IT Department for their information so they can look into their network speed.
It appears that neither of the "evil" ISP we are dealing with (Verizon or Comcast) have the problem. Too easy to blame someone's personal ISP when the problem can be somewhere else. (Even though the ISP can be blamed for many service woes.)
Ray
-----Original Message-----
From: wplug-bounces+rconnolly=pspmetrics.com at wplug.org [mailto:wplug-bounces+rconnolly=pspmetrics.com at wplug.org] On Behalf Of Rob
Sent: Monday, February 10, 2014 9:42 PM
To: General user list
Subject: Re: [wplug] Verizon vs Comcast
I get similar results to you and I use neither verizon nor comcast. At this point I'd consider
1) what kind of delay characteristics are there hitting other machines in the CMU network?
2) could cogentco be the bottleneck? a bad/weak gateway in their network? lousy load based routing through their network?
3) is the math.cmu.edu host doing something every evening that slows it down? is the www server configured to throttle based on some activity schedule or system load values? competing with evening network based backups?
Anyway, those are the questions I'd have at this point. I don't think the issue is verizon, comcast, or armstrong (my provider).
-Rob
--------------------------------------------
On Mon, 2/10/14, Florin Manolache <florinmano at gmail.com> wrote:
Subject: Re: [wplug] Verizon vs Comcast
To: "General user list" <wplug at wplug.org>
Date: Monday, February 10, 2014, 5:20 PM
Rob,
Enclosed is the traceroute listing for normal speed and for throttled down access, taken at less than one hour from each other. I have several sets of such measurements from different Verizon users.
Such periods of very low speed appear almost every evening.
What is missing are the results from Comcast users so I can better compare.
I'm all for net neutrality.
My goal here is to vote with my wallet and advice others to do the same.
Even if this will not translate immediately into net neutrality, it would be a small step in the right direction.
Florin
----------
Event 1: 8:30pm normal speed
http://my.verizon.com/services/speedtest/
Download :: 42.1 Mbps Upload :: 31.48 Mbps Latency :: 20ms
wget http://www.math.cmu.edu/~florin/SpeedTest/r20m
20,000,000 4.53M/s in 4.5s
traceroute to hum (128.2.32.145), 30 hops max, 60 byte packets
1 192.168.1.1 (192.168.1.1) 1.878 ms
1.834 ms 1.872 ms
2 L100.PITBPA-VFTTP-03.verizon-gni.net
(71.245.188.1) 5.890 ms 7.090 ms
7.432 ms
3 G0-1-1-3.PITBPA-LCR-21.verizon-gni.net
(130.81.60.172) 12.515 ms
12.773 ms 12.779 ms
4 xe-6-1-4-0.RES-BB-RTR1.verizon-gni.net
(130.81.163.72) 80.125 ms
xe-19-0-8-0.RES-BB-RTR1.verizon-gni.net
(130.81.209.74) 18.968 ms
xe-15-1-0-0.RES-BB-RTR1.verizon-gni.net
(130.81.209.38) 18.149 ms
5 0.xe-3-1-0.BR1.IAD8.ALTER.NET (152.63.37.61)
22.586 ms
0.xe-4-0-0.BR2.IAD8.ALTER.NET (152.63.38.117) 24.630 ms 0.xe-3-1-0.BR1.IAD8.ALTER.NET (152.63.37.61) 23.801 ms
6 te0-6-0-14.ccr41.iad02.atlas.cogentco.com
(154.54.10.225) 23.207 ms
15.376 ms te0-1-0-14.ccr41.iad02.atlas.cogentco.com
(154.54.12.45) 15.606
ms
7 be2177.ccr22.dca01.atlas.cogentco.com
(154.54.41.206) 16.838 ms
be2176.ccr21.dca01.atlas.cogentco.com (154.54.41.54)
18.330 ms
be2112.mpd22.dca01.atlas.cogentco.com (154.54.5.234)
19.682 ms
8 te4-3.ccr01.pit02.atlas.cogentco.com
(154.54.30.229) 26.838 ms
te2-4.ccr01.pit02.atlas.cogentco.com (154.54.3.90)
27.422 ms
te4-3.ccr01.pit02.atlas.cogentco.com (154.54.30.229)
28.682 ms
9 38.104.121.38 (38.104.121.38) 70.507 ms
71.517 ms 72.745 ms
10 38.87.51.2 (38.87.51.2) 73.016 ms
74.483 ms 74.309 ms
11 CORE255-VL987.GW.CMU.NET (128.2.255.249)
75.414 ms 76.034 ms 76.332
ms
12 128.2.255.156 (128.2.255.156) 40.404 ms
41.586 ms 41.752 ms
13 hum.math.cmu.edu (128.2.32.145) 64.275 ms 64.507 ms 64.468 ms
---------------
Event 2: 9:15pm very slow network
http://my.verizon.com/services/speedtest/
Download :: 41.98 Mbps Upload :: 36.97 Mbps Latency :: 20ms
wget http://www.math.cmu.edu/~florin/SpeedTest/r20m
20,000,000 104K/s in 5m
17s
traceroute to hum (128.2.32.145), 30 hops max, 60 byte packets
1 Wireless_Broadband_Router.home (192.168.1.1)
2.018 ms 1.961 ms 2.023
ms
2 L100.PITBPA-VFTTP-03.verizon-gni.net
(71.245.188.1) 6.383 ms 6.794 ms
7.057 ms
3 G0-1-1-3.PITBPA-LCR-21.verizon-gni.net
(130.81.60.172) 10.048 ms
10.376 ms 10.365 ms
4 xe-6-1-4-0.RES-BB-RTR1.verizon-gni.net
(130.81.163.72) 14.790 ms
xe-21-1-2-0.RES-BB-RTR1.verizon-gni.net
(130.81.163.68) 16.251 ms 17.360
ms
5 0.xe-2-3-0.BR1.IAD8.ALTER.NET (152.63.7.229)
17.951 ms 16.505 ms
16.493 ms
6 te0-3-0-14.ccr41.iad02.atlas.cogentco.com
(154.54.13.137) 57.990 ms
54.863 ms *
7 be2112.mpd22.dca01.atlas.cogentco.com
(154.54.5.234) 58.009 ms 57.926
ms 56.749 ms
8 te2-4.ccr01.pit02.atlas.cogentco.com
(154.54.3.90) 68.463 ms
te4-3.ccr01.pit02.atlas.cogentco.com (154.54.30.229)
68.388 ms
te2-4.ccr01.pit02.atlas.cogentco.com (154.54.3.90)
67.513 ms
9 38.104.121.38 (38.104.121.38) 69.373 ms
69.624 ms 69.571 ms
10 38.87.51.2 (38.87.51.2) 76.202 ms
76.296 ms 76.281 ms
11 * CORE255-VL987.GW.CMU.NET (128.2.255.249)
68.027 ms 68.179 ms
12 128.2.255.156 (128.2.255.156) 57.142 ms
57.525 ms 58.291 ms
13 hum.math.cmu.edu (128.2.32.145) 65.374 ms 65.381 ms 65.849 ms
On Mon, Feb 10, 2014 at 12:50 PM, Rob <tempest766 at yahoo.com>
wrote:
> I'd be very careful about using anecdotal evidence to say that one evil carrier (verizon or comcast) is better than the other. The truth is that without better testing you don't kow who or where the problem is occuring. It could be that the bastards are taking advantage of their privileged status of information and data provider to play favorites in routing or prioritizing traffic. The solution there is to support net neutrallity andtell the FCC that you want all ISPs and network providers to be designated common carriers and as public utilities so that they cannot play favorites.
>
> I consider both verizon and comcast to be evil but alas, they have a relatively captive audience with little to no real competition or customer choice.
>
> post your traceroute data taken at several times during a 72 hour period and we'll take a look to see if anything jumps out as a bottleneck.
>
> -Rob
>
> --------------------------------------------
> On Mon, 2/10/14, Florin Manolache <florinmano at gmail.com>
wrote:
>
> Subject: [wplug] Verizon vs Comcast
> To: "General user list" <wplug at wplug.org> > Date: Monday, February 10, 2014, 10:04 AM > > Hi everybody, > > I know this is not a Linux specific question, but I think > this is a > good place to dip into some expertise.
>
> The problem: I am working at CMU and use Verizon FiOS at > home (50Mbps download).
> During the late evenings the download speed to CMU goes > under 1Mbps, > sometimes much lower.
> Bandwidth tests show that locally in the Verizon network the > access > speed is fine (around 35-40Mbps) but once the traffic gets > out of > Verizon's network it is throttled down.
> Verizon blames Cogent for that, Cogent blames Verizon, and > the end > user is the one taking the hit.
> This is not only my problem, but all my colleagues on > Verizon FiOS > experience it.
> Also, not only the traffic from CMU gets throttled down, but > a lot of > other sites, Netflix, YouTube, etc, basically everything > that follows > the Verizon-Cogent route.
>
> Potential solution: some people claim that the problem > doesn't exist > from the Comcast network.
> Even if the bandwidth is lower than the one offered by > Verizon, the > claim is that Comacat's bandwidth is sustainable at the > order of about > 20Mbps even during the evenings.
> If I could check that, I'll switch to Comcast and advice all > my > Verizon FiOS colleagues to do so.
>
> I would like to hear your opinions, thoughts, and > experiences > regarding this issue.
> If you have Comcast please try some bandwidth tests around > 9-10pm and > let me know the results.
> For the bandwidth tests I was using http://testmy.net/ or a 20MB > download from one of my servers at > http://www.math.cmu.edu/~florin/SpeedTest/r20m
>
>
> Thank you very much,
> Florin Manolache
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