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miball
join:2005-08-17
Seattle, WA

miball

Member

Comcast Cap

Could they possible be doing this so that down the road you can't get all your TV / Movies over their pipes. In a way trying to force you to buy their products. As I know they are scared of becoming a dumb tube. Any thoughts?

rkrocha
join:2000-09-23
Garland, TX

rkrocha

Member

yup. It doesn't make sense if you are buying and downloading their content for them to discourage it by putting a cap on it.

NOCMan
MadMacHatter
Premium Member
join:2004-09-30
Colorado Springs, CO

NOCMan

Premium Member

Comcast will be perfectly able to ignore anything you buy from them since it's on network.

A HD Movie averages 6GB under Crapcast's plan it would cost you 9 dollars at 1.50 a gig if you were over your limit.

Online backups of all your digital media would cost you over 500 dollars to download if you had a terabyte to download.

Let the pipe be what it is and apply QOS policies to guarantee user experience. If you're getting a buch of web surfers and emailers complaining mark http/https and SMTP/Pop/Imap traffic as priority over bulk download and torrent traffic.

It's that simple. And in 99% of the cases that technology is already deployed in their networks.
88615298 (banned)
join:2004-07-28
West Tenness

88615298 (banned)

Member

said by NOCMan:

Online backups of all your digital media would cost you over 500 dollars to download if you had a terabyte to download.
Please explain to me where it says you have a right to download a TB worth of data for $50 a month?

SpaethCo
Digital Plumber
MVM
join:2001-04-21
Minneapolis, MN

SpaethCo to NOCMan

MVM

to NOCMan
said by NOCMan:

A HD Movie averages 6GB under Crapcast's plan it would cost you 9 dollars at 1.50 a gig if you were over your limit.
NetFlix is $9.99/mo for 1-out/unlimited movies, and you get the full 1080P 35GB BluRay version.
said by NOCMan:

If you're getting a buch of web surfers and emailers complaining mark http/https and SMTP/Pop/Imap traffic as priority over bulk download and torrent traffic.
What's your solution for marking apps that use a random selection of TCP/UDP ports?
patcat88
join:2002-04-05
Jamaica, NY

patcat88

Member

Look inside the traffic and identify the protocol. If its not SMTP, POP, or HTTP, mark it as bulk. Heck, if your going to QOS, we can make this REALLY easy, each node passes 400 houses max. Position the QOS ranks the following, highest priority is the user with least GB transfered over last 30 days rolling (otherwise you will have a race when the billing cycle rolls over), 2nd highest priority is used with 2nd least GB transfered, and so forth, user with most GB transfered is last in priority and is the most "bulk" of the node.

SpaethCo
Digital Plumber
MVM
join:2001-04-21
Minneapolis, MN

SpaethCo

MVM

said by patcat88:

Look inside the traffic and identify the protocol. If its not SMTP, POP, or HTTP, mark it as bulk. Heck, if your going to QOS, we can make this REALLY easy, each node passes 400 houses max. Position the QOS ranks the following, highest priority is the user with least GB transfered over last 30 days rolling
Cool.

Can you provide a sample for how that CMTS configuration would look?
patcat88
join:2002-04-05
Jamaica, NY

patcat88

Member

said by SpaethCo:

Cool.

Can you provide a sample for how that CMTS configuration would look?
The only way the CMTS would be involved is that it gets polled by SMTP by a computer for the bandwidth usage of each user over the last 24 hours/last day/since last CMTS reboot.

1 router after the CMTS will apply QOS tags to individual IP connections based on source address (cable modem IP) on outgoing connections and destination address (cable modem IP) on incoming connections, then another router after that will be set rate limit (drop TCP packets with data in them, dropping acks and syns and fins will just generate tech support calls, make sure to set rate algorithm to never throttle any particular IP to below 128kbit/s if the rate shape alogorithm or user behaviour goes haywire to not knock everyone else off) the downstream to the CMTS to 40mbits (capacity of node downstream). Same idea for upstream.

A more dangerous and subject to manipulation by cable modem hackers and CMTS compatibility and cable modem compatibility would be to push QOS tags or VLAN tags (each modem on its own VLAN, and then you shape the VLANs) to individual cable modems, then the CMTS can rate shape or the 1st router.

SpaethCo
Digital Plumber
MVM
join:2001-04-21
Minneapolis, MN

SpaethCo

MVM

said by patcat88:

1 router after the CMTS will apply QOS tags to individual IP connections based on source address (cable modem IP) on outgoing connections and destination address (cable modem IP) on incoming connections, then another router after that will be set rate limit (drop TCP packets with data in them, dropping acks and syns and fins will just generate tech support calls, make sure to set rate algorithm to never throttle any particular IP to below 128kbit/s if the rate shape alogorithm or user behaviour goes haywire to not knock everyone else off) the downstream to the CMTS to 40mbits (capacity of node downstream). Same idea for upstream.
The only way that is possible is if you were using a more flexible routing platform like a Linux box, which would give you flexibility but would fall over under any kind of load. The marking rules need to be pre-established, because there has to be a TCAM lookup in real-time to determine if a tag can be added. Hardware routers have a limited pre-determined set of instructions they can act on determined when the instruction set is baked into silica during manufacturing.
said by patcat88:

(each modem on its own VLAN, and then you shape the VLANs)
You can't put each modem on its own VLAN in a shared L2 environment, nor would you want to.
patcat88
join:2002-04-05
Jamaica, NY

patcat88

Member

said by SpaethCo:

The marking rules need to be pre-established, because there has to be a TCAM lookup in real-time to determine if a tag can be added. Hardware routers have a limited pre-determined set of instructions they can act on determined when the instruction set is baked into silica during manufacturing.
Get a proper router then or get a Sandvine or its clone then. Who has hardware routers anymore? What do you do when there is a security issue, buy a new card? All routers have software and firmware nowadays, and they are sold by what firmware (and therefore what features) they have on them.

SpaethCo
Digital Plumber
MVM
join:2001-04-21
Minneapolis, MN

1 edit

SpaethCo

MVM

said by patcat88:

Get a proper router then or get a Sandvine or its clone then. Who has hardware routers anymore?
Every single backbone provider on the Internet.

The Juniper e-series, the Force10 e-series, and the Cisco CRS1s are all hardware ASIC based routers. You can't scale very far in software; the above solutions will all route multi-terabit quantities of traffic at line rate. The control plane is software based, but the forwarding plane that reads the IP header of packets and makes forwarding decisions is baked into hardware.
patcat88
join:2002-04-05
Jamaica, NY

patcat88

Member

A CMTS is a much lower traffic volume than a backbone router.

»www.cisco.com/en/US/docs ··· mon.html
»www.cisco.com/en/US/docs ··· p1011031

8 levels of upstream priority QOS. Put all your users into different levels based on upstream usage, problem solved.

BTW, Cisco Routers DO have protocol inspection by default nowadays. The 7200-NPE-G2 router card for the 7200 series can be upgraded to run IOS 12.4(15)T4, it has "NBAR - Network-based Application Recognition" and "NBAR- BitTorrent PDLM " so yeah, most cisco routers that run latest IOS can look inside TCP packets by default.