Romney2012Defeat Obama 2012-Chg we can believe inPremium
join:2002-03-03
USA
kudos:4 | reply to Mr Matt
Re: Meter might be trouble for ISP's. said by Mr Matt:Does the Cable Modem really generate 3.3GB/mo? That would really screw someone with a 5GB/mo CAP! Yes it really does. I measured it by monitoring WAN traffic using DD-WRT firmware in my router. It averages about 10 kbps. And that is with Docsis 1.1. Another user here at BBR says that it is even higher when upgraded to Docsis 2. Who knows what Docsis 3 overhead is like.
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 SLDPremium
join:2002-04-17
San Francisco, CA | If that is true, your math is correct:
»www.google.com/search?q=10Kb%2Fs+*+30+days |
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I'll try on docsis 3 with dd wrt. Comcast hasn't gone gestapo on people yet anyway, so isn't this a non-issue for now?
I use Outlook to pull my mail, but I had the unfortunate experience of trying their Smartzone mail...man, that's horrible. I would hope they'd fix that too.
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 tubbynetreminds me of the danse russePremium,MVM
join:2008-01-16
Chandler, AZ | reply to Romney2012
a typical cmts (like the cisco ubr series) communicates directly with the modem via the hfc mac address. however, the device that is presented behind the cable modem (be it router or single pc) is also able to be tracked by the cmts (because it is assigned a dhcp "public" ip address). the "overhead" traffic between the cable modem and the cmts can be excluded by the mac address of the destination network frame. this could then be polled using a simple snmp procedure. granted, all of this would need to be coded and rolled out to each market and tested, but a year is a little excessive, even in carrier terms.
said by Romney2012:said by Mr Matt:Does the Cable Modem really generate 3.3GB/mo? That would really screw someone with a 5GB/mo CAP! Yes it really does. I measured it by monitoring WAN traffic using DD-WRT firmware in my router. It averages about 10 kbps. And that is with Docsis 1.1. Another user here at BBR says that it is even higher when upgraded to Docsis 2. Who knows what Docsis 3 overhead is like. just because it is "seen" by your router, doesn't mean its passing through. it is more than likely broadcast traffic or overhead traffic between the cmts and the modem that is passed. a more accurate traffic count would be to measure the bandwidth in/out at your lan port (if you have a single routed port) or at the lan svi (which is what the "lan address" is on the typical soho router). no whether or not the ddwrt software can make this distinction or not either internally or through snmp is another story.
additionally, 3 gigs is *not* going to put you on the "comcast black list". if you are using 253 gigs a month, they aren't going to punish you. while it is a valid concern for the most accurate bandwidth usage/count, its not going to be a deal breaker.
q.
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Romney2012Defeat Obama 2012-Chg we can believe inPremium
join:2002-03-03
USA
kudos:4 | said by tubbynet:a typical cmts (like the cisco ubr series) communicates directly with the modem via the hfc mac address. however, the device that is presented behind the cable modem (be it router or single pc) is also able to be tracked by the cmts (because it is assigned a dhcp "public" ip address). the "overhead" traffic between the cable modem and the cmts can be excluded by the mac address of the destination network frame. this could then be polled using a simple snmp procedure. granted, all of this would need to be coded and rolled out to each market and tested, but a year is a little excessive, even in carrier terms. said by Romney2012:said by Mr Matt:Does the Cable Modem really generate 3.3GB/mo? That would really screw someone with a 5GB/mo CAP! Yes it really does. I measured it by monitoring WAN traffic using DD-WRT firmware in my router. It averages about 10 kbps. And that is with Docsis 1.1. Another user here at BBR says that it is even higher when upgraded to Docsis 2. Who knows what Docsis 3 overhead is like. just because it is "seen" by your router, doesn't mean its passing through. it is more than likely broadcast traffic or overhead traffic between the cmts and the modem that is passed. a more accurate traffic count would be to measure the bandwidth in/out at your lan port (if you have a single routed port) or at the lan svi (which is what the "lan address" is on the typical soho router). no whether or not the ddwrt software can make this distinction or not either internally or through snmp is another story. additionally, 3 gigs is *not* going to put you on the "comcast black list". if you are using 253 gigs a month, they aren't going to punish you. while it is a valid concern for the most accurate bandwidth usage/count, its not going to be a deal breaker. q. I don't disagree with your conclusions. Just pointing out that the cable modem is seeing this overhead traffic and Comcast may or may not be counting it. And I avg about 10 to 15 GB/mo, so I am not worried about it at all. Just answering someones question about overhead traffic.
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| reply to Romney2012
said by Romney2012:said by Mr Matt:Does the Cable Modem really generate 3.3GB/mo? That would really screw someone with a 5GB/mo CAP! Yes it really does. I measured it by monitoring WAN traffic using DD-WRT firmware in my router. It averages about 10 kbps. And that is with Docsis 1.1. Another user here at BBR says that it is even higher when upgraded to Docsis 2. Who knows what Docsis 3 overhead is like. Yeah it's weird - recent Comcast experiences is that when I have a switch plugged in (multiple IP addresses) the modem will flood the network with packets as the switch activity LEDs are flashing...I don't know what is going over the wire as I haven't had the chance to install tcpdump on one of my routers but it seems rather harmless. This also happens at other people's houses too so it's not someone just DDoS me or something. What I do know is that the traffic is probably against my "cap", but comcast hasn't called me yet to complain so I am not overly worried about it.
On another subject -
I would say the main reason why Comcast (and other providers) wont rollout a bandwidth metering tool is because once it gets out there, people will start comparing usage and prove the ISPs are a lying sack of S$!% when it comes to "average" monthly usage. Especially if everyone's average comes out to 100GB/month (no proof it is or isn't...just speculating) when the ISPs are tooting that on average people only use 5GB/month. |
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 IPPlanManHoly Cable Modem Batman
join:2000-09-20
Washington, DC
kudos:1
1 edit | Not average... Comcast is giving a "Median"... which I don't believe is really that low anyway for that matter.
50% above and 50% below that?
Yeah right...  |
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