US Cable Support > Comcast HSI > [Speed] Congested Comcast Peering with Akamai, Google in Midwest

reply to johnnn

Re: [Speed] Congested Comcast Peering with Akamai, Google in Mid

Thanks, JohnInSJ, here goes:

-Blast (25/4)
-I have a Motorola SB 6121; 4 downstream, 3 upstream channels bonded.
-I have all cat5e cable between devices (modem-router, router-computers). The router is a TP-Link TL-WR2543ND with 4 gigabit ports.
-I am not loading the connection when I perform tests
-I have run tests with multiple computers hooked directly to the modem
-I have had two tech visits to verify good line quality (both found a very stable plant/no issues using their JDSU equipment)
-All of my computers are free of malware and experience little/no resource contention during testing. I have tested on Windows 7, Windows 8, Ubuntu 12.04.
-I have asked pointed questions about congestion in my area in Comcast Direct ("can you confirm there is congestion between endpoints in my area and certain peering/transit links?") and received nonspecific answers which refrain from disconfirming.

I assume when the techs visited (as in when they were there testing your line/modem signals) you were NOT seeing the issue?

Comcast doesn't generally have congestion issues anywhere, in the modern era. This is is why I would think this is something other than congestion - if its intermittent, does it vary in time of day, day of week?
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reply to johnnn
I am not going to try to convince you that you are not seeing problems with some sites/services, but what you seem to expect Comcast to do is not going to happen for a residential or small business customer; they are only going to look at the results for the majority of similar customers.

The only way you are going to get any ISP to even bother to look at transit problems that are outside their network (especially if most of their other customers are not seeing/reporting the same problem) is if you are an Enterprise level customer (such as a customer with multiple Metro Ethernet or DS3 connections paying at least 5 digit amounts each month for service).

Sorry, but that is just the way that the industry works.
--
A well-regulated militia, being necessary to the security of a free State, the right of the people to keep and bear arms shall not be infringed.

When governments fear people, there is liberty. When the people fear the government, there is tyranny.

reply to JohnInSJ
Both visited during the day on weekdays. They didn't perform tests past basic speedtests to the Comcast server near Detroit. The throughput problem is definitely exacerbated during peak times. Recently it was so bad I couldn't stream a 360p YouTube video from beginning to end without pauses (in video info, stream fluctuates between 200-900kbps).

The reason I believe congestion (at some level) to be the issue is this: I could close the page, retry, get the same poor performance, but then run a shaperprobe and get 36mbps down (shaped to 25mbps after Powerboost tokens spent) from whichever servers host the Shaperprobe test files.

NetFixer, I agree with your assessment.

reply to johnnn
Is your router capable of IPv6? If so try disabling that capability. I have a netgear router that was in auto mode, and was in 6to4 tunnel mode. Caused my streaming of netflix and youtube to be terrible.

reply to JohnInSJ
I'm using anycast (75.75.75.75), and my router doesn't support IPv6.

It may be that your local router is being upgraded... in your first post Hop 3 indicated a 'te' interface.

When I just tracerouted to it now, it's showing as a 'xe' interface.

  3    20 ms    10 ms    10 ms  96.120.41.137
  4    12 ms     7 ms     7 ms  xe-8-2-0-sur01.grandrapids.mi.michigan.comcast.net [68.86.140.185]
  5    17 ms    19 ms    27 ms  te-0-2-0-4-ar01.taylor.mi.michigan.comcast.net [69.139.254.29]
  6    18 ms    17 ms    19 ms  xe-7-3-0-sur01.wannarbor.mi.michigan.comcast.net [68.85.218.201]
 

DrDrew is right. When I do tracerts *to* the edge they travel through an xe interface.

reply to johnnn

reply to depster
FWIW, just a point. As Dr.Drew stated, it's the same physical router. This data needs to also be examined when evaluating the rDNS info on hops;

te-8-2-ur02
xe-7-0-sur01

Even though the IP address is the same, the slot, port, and ring data is different.

Some examples of some meanings;

Some examples;

ge = gigabit ethernet.

te / xe= ten gigabit ethernet.

p, po, pos = Packet Over Sonet (an OC-3 or faster connection).

XE / TE = Juniper / Cisco 10GigE Interface
be / ae = Cisco Bundle Ethernet / Juniper Aggregate Ethernet

he = hundred gigabit ethernet.

1-1, 1-2, 1-11, 6-1, 9-1, 2-2, etc. = slot and port.

ar01, cr01, ur01

User Ring (UR), Area Ring (AR), Core Ring (CR) routing.

EG, you're the best.

I doubt that but thanks for your kind words !

reply to JohnInSJ
That is Comcast's anycast DNS

reply to EG

reply to nate1234

reply to EG