Finally, a Resolution to Comcast’s Connectivity & Latency Issue Nightmare

Posted 1571 days ago - Comcast

Comcast is slowly training their loyal customers to embrace what many are calling the end of the free, neutral, Internet. Several individuals, myself included, continuously experience a diminishing quality of service from Comcast. A couple examples include: DNS servers randomly become inaccessible, selling their customer's phone number(s), and employing phone technicians that simply refuse to troubleshoot anything.

"NO. I WOULD NOT LIKE FOR YOU TO SCHEDULE ANOTHER TECHNICIAN TO COME TO MY HOUSE, RUN HIS TESTS, PUT A SPLITTER IN THE LINE, REMOVE A SPLITTER, AND TELL ME EVERY THING'S FINE. I WILL NOT TAKE ADDITIONAL TIME AWAY FROM MY JOB TO ACCOMMODATE SUCH RIDICULOUS AND UNJUSTIFIED BEHAVIOR. MY CABLE MODEM IS NOT RECEIVING A REPLY FROM YOUR DHCP SERVER, DESPITE CONTINUOUS EFFORTS TO RECEIVE AN IP! HAVE YOU EVER CONSIDERED YOU'RE THE ONE THAT NEEDS A POWER CYCLE?"

And after all this, the poor girl replied with,

"I'm sorry sir, we don't have DHCP servers, but we can try to power cycle your modem again if you think that'll help."

Yes, I've personally heard a Comcast technician say the phrase cited above. I've also been told Comcast doesn't have DNS servers. After hearing all this non-sense, switching to DSL crossed my mind several times, but claiming defeat doesn't come that easy.

Convinced Comcast is throttling my bandwidth, I started looking for ways to resolve the problem on my own, and here's what I've come up with. Linksys routers, and presumably most others, have what's known as a MAC Address Clone function/capability. Comcast assigns their customers an IP based on not the cable modem's MAC address, but the MAC address of the device next in line within a network.

To confirm the previous statement is true, plug your cable modem directly into your computer's NIC, power cycle (HAHA) the cable modem and make note of your IP address. Now, insert the router back into the equation by unplugging the Ethernet cable from your computer (the other end is plugged into your cable modem) and plugging it back into the WAN port on the router. Reestablish the connection between your computer and router, and finally, power cycle your cable modem. Your IP is different.

Login to your Linksys device and find the MAC Address Clone link somewhere within the navigation menu. In the drop down menu, change Disable to Enable. The text input boxes become active. Type in a random series of letters/numbers within 0-9, A-F. Here are a couple examples.

00-1D-FF-21-DF-ED

12-DE-18-FF-AC-2B

Once you're satisfied, click the Save Changes button toward the bottom of the user interface. Your router will not have an IP address from Comcast at this point, so you'll need to power cycle your cable modem, again. That phrase [power cycle] is hilarious.

Here's a screen shot, with highlights:

Linksys Clone Mac Address Screen Shot

This trick doesn't mean you're deceiving Comcast, they still own you. Your Cable modem's MAC is associated with your account information, so don't think of this as a way to conceal your identity or anything - you just get a different IP, potentially from a different gateway.

Twelve hours since implementing the suggestion above and my tunneled remote desktop session has yet to drop. I'll continue using this MAC address until outgoing packet loss starts occurring again. Expect an update in the near future.

Word Count: 692

Tags: , , ,

Click Here to Submit a Comment

Permalink / Last Modified:

Support Nullamatix.com:

See Also:

  • 10/01/2010 -- Disable IPv6 The Right (Debian) Way
    Excerpt: "IPv4 has been in place for around 30 years now and is still a testament to human ingenuity. Unfortunately, IPv4 is limited to approximately 4.3 billion addresses, 0.0.0.0 - 255.255.255.255. As more cities in more countries get connected to the Internet, the ..."
  • 02/22/2008 -- U.S. Internet Service Providers Should Be Ashamed
    Excerpt: "The majority of Internet users are aware of what's going on with Comcast and their throttling practices, the idea of a tiered and non neutral Internet, immunity to the telco's for warrantless wiretapping, and countless other crimes that go completely against ..."
  • 07/25/2007 -- Comcast For The Win – Power Cycling Your Cable Modem Is Useless
    Excerpt: "For those of you with a cable service provider, the first item on the tech's script involves "power cycling" your cable modem. Even if you've power cycled your modem three times prior to calling, the technician will ask you to shutdown your computer (which ..."
  • 04/24/2009 -- Flow Control Platform (FCP) is Pissing Me Off
    Excerpt: "Every two hours or so my servers are set to email me a summary of events and other misc. information. Some of the information is memory/cpu utilization, which processes are running, a list of listening services, which cron-jobs ran, who logged in, etc. My ..."

13 (Comments|Trackbacks)

[ RSS feed | Trackback URI | Leave a Comment ]

collapse Tom # @ 2008-05-21 12:11:53 Subscribed Via Email

Here's what happens at Comcast when you call 1-800-Comcast...

Navigate prompts, get through to customer service to complain...you reach a girl who was recently arrested while on the job for dealing drugs after work...she explains to you in mumbled English that she'll transfer you to the right person. On hold, you patiently wait and eventually get in touch with an individual who considers you to be an annoyance, but will tolerate you for the next few minutes and complain about you later.

The person will go through the Powercycle, check connections, etc options, as always, because you're thought of as incapable of doing this yourself before you called. Now that this routine is over, he's the part where they make your modem reset from the office. If your reply isn't "WOW!" or "How'd you do that?", they know you're someone that needs to hear that a field tech needs to see what the problem is.

Once your Field tech is scheduled a week from the present day's date, you get a few calls confirming the appointment, then a call from a contracted tech, not a Comcast employee. They call at 8am, hoping that you will not answer so that they can cancel the appointment because you weren't there. They'll say they stopped by and even go so far as to slip a note on your neighbor's door, pretending to have actually given it a try.

If you're lucky enough to get an actual Comcast Field Tech, you'll find they're as worthless as the people on the phone because they'll track mud all over your floors, cut a few wires and leave small copper pins from the coax in the carpet for your kids to step on, and then make you sign a paper freeing them from responsibility and the company from having to accept the fact that it's their own fault your connection is bad.

Tell me I'm wrong. I'm not. I lived in that world for two years and refuse to go back. I don't like DSL and really don't care for Dish, but Comcast's special programs, such as the RETENTION DEPARTMENT and the FORGIVENESS PROGRAMS, cost YOU the real working Americans, all of your hard earned money, because you're paying FULL PRICE to cover for people who don't pay their bills and for the extremely wealthy who receive a 10% discount on their cable bills for living in what Comcast refers to in their memorandums as a "PREFERRED" area.

Give that some though next time you want to give Comcast another chance.

 
collapse Jonathon # @ 2008-10-19 12:46:00

I want a new option, I hate Comcast as of October 1st. My Internet has become extremly unstable and cuts my TCP/IP connections randomly. I'm not downloading illegal content and I feel I'm being punished... my unlimited Internet is no longer unlimited. I tried to call their 1-800 line but I was never able to get someone on the phone after 3 hours. 3 HOURS on HOLD and then they disconnected me. I'm just about to my wits end with this horrible company.

 
collapse Chris # @ 2008-11-24 12:50:30 Subscribed Via Email

Is COMCast the exclusive provider in your area? Just curious why everyone just doesn't drop their asses to start making a point.

Anyhow, when doing the following step:
"Login to your Linksys device and find the MAC Address Clone link somewhere within the navigation menu. In the drop down menu, change Disable to Enable. The text input boxes become active. Type in a random series of letters/numbers within 0-9, A-F. Here are a couple examples."

Is the MAC supposed to be random or should we use the MAC address from the modem (or will this make the network freak out)? This makes it sound like COMCast keeps a list of linksys MAC addresses that it treats differently.

Chris

 
collapse Shirley # @ 2008-11-25 17:34:05

Yes, comcast leaves much to be desired. But given the limited choices out there, few of us have better alternatives.

 
collapse John # @ 2008-12-22 22:59:21

Comcast sucks. I've been using Remote Desktop with XP since 2003 to get from my home computer to my work computer. This year, it's become near unfunctional. It can barely keep a connection and it's not my work computer. My home connection consistently slows to a crawl.

I only have 2 broadband options for Internet where I live, Comcast and AT&T. Thanks to the government and their protected market for the telecoms we the consumers have no good options. Comcast's phone support is incompetent. There's no other explanation, they are flat out incompetent. All they ever recommend is to reboot the computer which is a joke. I'm sorry, when everything I ping drops half the packets, it's not me, it's you (yes, you Comcast).

Comcast had better hope the government doesn't open up the spectrum for broadband because I'll drop Comcast in a heartbeat. I have no loyalty for their worthless service.

 
collapse Dave B # @ 2009-09-08 01:52:19

Guy Patterson, you're my hero. This worked for me. I think I'll go power cycle my beer to celebrate.

 
collapse Timg # @ 2009-10-26 14:43:57

I've had a similar problem the past several months.

I have been with comcast for going on 6 years now. I started out with their old basic cable which I think was 6mb at the time maybe it was 4mb. It's been upgraded gradually to 16mb service I have at the moment.

When I got the 16mb I got VOIP through Comcast.

I've never had a latency issue with comcast prior to this period. I either had service or I did not.

We play MMORPGs nothing taxing as far as bandwidth but we play quite a bit of hours so this is our primary entertainment expense.

Anyways about two months ago now our modem would start dropping connection and then we would get crappy latency. Pages like google.com homepage would take minutes to load if it would even load. You couldn't complete a speedtest.net test. Things we were doing regularly for months now were crawling.

Their phone support tried to tell us it was our service and we were capping out our speed and needed to upgrade. To which I promptly told them they were full of it, if a slower service wrorked fine a month ago, an upgraded service now should be faster not slower.

After a run around a few days I got in touch with a local operations supervisor who got maintenance out to the house. Longer story short they ended up saying the signal to the house was too hot and needed ot be toned down. The techs in the house said the signal was no perfect.

Problem went away for a month. Here we are and it started agian last night. Tech came out this morning and it was running fine this morning and the signal at the modem he said was perfect.

Last night when it was running like crap after trying a dozen other things I ran acorss this post and tried this. It resolved my issue almost instantly. NOt sure why it works but it did for me.

collapse Guy Patterson # @ 2009-10-26 15:13:48

Tim,

That's one hell of a story, thanks a lot for sharing. I'm still equally amazed at how well this works. Since October of '07 I've had to do this less than half a dozen times, but every time the latency issues were immediately resolved.

Comcast IS throttling their customers. This small "fix" must somehow circumvent their traffic shaping filters until your flagged, again? Just a speculation, wouldn't surprise me..

Anyway, glad it worked!

-Guy

 
 
collapse Dcaz # @ 2009-11-04 12:55:04 Subscribed Via Email

Whenver I change my Linksys router to 'Enable' on the MAC settings and enter the letterse, I can not connect. I then change it back to 'Disable' and I can connect. Something I am missing here?

collapse reg # @ 2010-05-08 09:38:01

In most cases, you only need to press the reset button on your modem after changing the MAC address. Switching cables and power cycling is actually not necessary.

http://www.dslreports.com/r0/download/1360619.thumb600~d5b8ad264e043fa7a5817fa0a26f62d8/RCA%20eMTA.gif/thumb.jpg

 
 
collapse LOL # @ 2009-11-04 15:35:17

Dcaz yes they have now locked you into a single mac address in some area's,so changing the mac,no makes you not connected at all

 

Leave a Comment

Comments are moderated prior to showing up. If your comment does not show up immediately, please do not attempt to resubmit. If you're redirected to the original post after pressing "Add Comment", your comment was successfully entered into the moderation queue.

Trackback Responses to This Post: