 patcat88
join:2002-04-05
Jamaica, NY | sigh And the only ppl who will get any benefit are business users with dedicated fiber from Comcast who pay $1K+ each month for service/ | |
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 | openbox9
join:2004-01-26
Navarre, FL | Re: sigh Umm, this is their backbone and will support everyone. Read the press release. | |
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| neufuse
join:2006-12-06
Indiana, PA | Backbone is for EVERYONE on Comcast... the bigger your backbone the faster you can move traffic across a region... all comcast's traffic residential and business go through the same backbone network... | |
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| | BosstonesOwn
join:2002-12-15
Everett, MA
clubs: | Re: sigh No , you can't move it faster. But you can shuffle around more of it. | |
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oldcyberdude
join:2000-07-27
Exton, PA | Coincidence? Interesting item:
I live outside Philly
Comcast provided entirely new IP just before March 9
Ping times dropped slightly on March 11 | |
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| neufuse
join:2006-12-06
Indiana, PA | Re: Coincidence? I'd say you're thinking into this too much | |
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| 
funchords
Robb
Premium,MVM
join:2001-03-11
Hillsboro, OR
 ·Verizon Online DSL
 ·Comcast
| said by oldcyberdude  :Interesting item: Ping times dropped slightly on March 11 I don't know when this test starts or ends (or if it ends).
Whether your traffic is directly on it or merely nearby, it could reduce ping times as it becomes an alternate path for congested links. If the area is already uncongested, it should have no effect.
I keep having to remind myself that all of these links move with the same speed (nearly the speed of light). What is being improved is the capacity. We're widening the highway, not changing the speed limit.
--
Robb Topolski -= funchords.com =- Hillsboro, Oregon
"We don't throttle any traffic," -Charlie Douglas, Comcast spokesman, on this report. | |
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oldcyberdude
join:2000-07-27
Exton, PA | Re: Coincidence? news release said test was week of mar 9 | |
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Transmaster
Onward Through The Fog
join:2001-06-20
Cheyenne, WY | Drool Smack Porno.....at 100 G's...MMMMMMMM....it's what's for dinner. 
--
Send a prayer to Allah, eat Beans. | |
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idjk
@embarqhsd.net
| Comcast Tests 100-Gig Optical Links More bits per fiber is good for everybody I only hope they stick with the old stby of diverse fiber routes because with DWDM you have a lot of eggs in one basket.
On another note, I have not kept up with fiber and I wonder what the max cap for today's fiber is- because fiber prices have come down over the years, but it may be time for the next gen of fiber cable.
It was only about 8-9 years ago we installed the 1st DWDM (as a test bed)here in Orlando and it was way down spec from anything today. | |
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factchecker
@cox.net
| Re: Comcast Tests 100-Gig Optical Links said by idjk :
More bits per fiber is good for everybody I only hope they stick with the old stby of diverse fiber routes because with DWDM you have a lot of eggs in one basket. Always good to see someone with a clue posting... This exact issue was discussed on the NANOG list a few weeks ago. One of the execs at Qwest was caught talking about how they wanted to use their standby routes and fibres to carry live data. It was universally rejected as a terrible idea. Yes, it results in higher utilization rates on expense equipment and fibre routes, but it also ups the ante when things fail and seriously oversubscribes the network.
Of course, on the balance sheet, it looks very nice, so I'd be willing to bet and wouldn't be surprised if Comcast or others followed Qwest's example. | |
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| 
telcolackey
The Truth? You can't handle the truth
join:2007-04-06
Death Valley, CA
| said by idjk :
On another note, I have not kept up with fiber and I wonder what the max cap for today's fiber is- because fiber prices have come down over the years, but it may be time for the next gen of fiber cable.
Depends on the fiber and the optical system. With newer fiber like ELEAF you can run ~72+ wavelengths over systems with 50GHz spacing or 36 waves with 100Ghz spacing. Older fiber has challenges and that number is reduced.
So 720G w/ 10G waves, 2.88Tbps@40G or 7.2Tbps@100G.
So your mileage may vary and it depends on
•Channel spacing
•Capability of the installed fiber
•Transponder speeds (10, 40, 100G)
AFA running another fiber, I don't think that is needed any time soon.
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"Believe only half of what you see and nothing that you hear." - Dinah Craik | |
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Rob 23
@windstream.net | They rent the fiber from LEVEL3 SO I guess it's at least 15 year old fiber ( STD-SMF )with the new fiber (ZWPF)you can use the E-BAND wavelength " Enables 33% more bandwidth". | |
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l3fiber
@comcast.net | Re: Comcast Tests 100-Gig Optical Links Level3 fiber is ELEAF and some of the newest long haul fiber with total US coverage. Not many ran a new footprint since L3 deployed theirs. | |
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Gage
@comcast.net
| Whats the point Whats the point of these super speeds if none of us will ever see it outside of these testing environments. Also, even if those speeds would EVER reach a wide audience of Comcast users, with all the traffic shaping that Comcast does, who know what we will or won't be about to download. I mean Comcast has started with P2P traffic, but who says they have to stop there. I mean they would filter anything they choose apparently and call it "reasonable network management", and the FCC would do nothing, as they have shown recently.
So this high speed is very nice and dandy, but when I don't even see the 6Mbit that I am paying for, and with Comcast playing big brother and then some, what is the point.
Sorry for the negative spin. | |
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| majortom1029
join:2006-10-19
Lindenhurst, NY | Re: Whats the point This speed will be needed if they do infact go with docsis 3. This tech is for their backbone which will need to handle all the increased speed that everyone will have with docsis 3. | |
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| SKYWARP
join:2005-02-02
Portland, OR | This is backbone we're talking about, this is expanding their ability to handle all of their traffic, that helps everyone. | |
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| neufuse
join:2006-12-06
Indiana, PA | Personally, I say whats the point of people replying to stuff like this like you did? The whole point of the backbone network is to make the network more stable and handle more load, not give customers higher speeds... | |
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Gage
@comcast.net
| Re: Whats the point The point is that what is the point of the EXTRA load that the is suppose to be, if we at the end of the backbone never see it. If we never see the EXTRA stability and still have our service go out every time the wind blows. What is the point of all this extra capacity if we never get the bandwidth we pay for, as I am in my case. I don't use P2P or any file sharing of any kind, and can never reach the speeds I am paying for.
If you cannot take the negative and view point along with the positive ones, then what is the point of YOU being here and reading these responses. | |
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| | | espaeth
Misanthrope
Premium
join:2001-04-21
Minneapolis, MN
·Embarq
·Comcast
| Re: Whats the point said by Gage :
The point is that what is the point of the EXTRA load that the is suppose to be, if we at the end of the backbone never see it. The point is that this bandwidth quite literally translates into things that people "see". All of that On-Demand content doesn't magically fall out of the sky -- they use the majority share of their backbone bandwidth for video distribution. | |
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| | | neufuse
join:2006-12-06
Indiana, PA | There is a lot more stuff going down the comcast backbone then internet... they send digital channels across the country on it including vod content to its distribution servers | |
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| | | openbox9
join:2004-01-26
Navarre, FL
·Mediacom
| said by Gage :
The point is that what is the point of the EXTRA load that the is suppose to be, if we at the end of the backbone never see it. Did you ever think this might be one of the reasons why Comcast is increasing bandwidth? | |
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| 
PGHammer
join:2003-06-09
Accokeek, MD
clubs:
| The issue (with both the new speeds and that Comcast will use their existing network) is that this is the second most congested of their SuperClusters (arguably their *most congested*, as it consists of Greater Philly, Baltimore Metro, Washington Metro, Tidewater, and Greater Richmond, in addition to the Eastern Shore and Southern Maryland miniclusters). The traffic *just within the SuperCluster* is approaching saturation, if not oversaturation, and it will only get worse (two Comcast-owned RSNs lie within the SuperCluster, in addition to Comcast's corporate HQ). By moving medium-haul traffic within the SuperCluster to the faster 100 gigabit pipeline, this will give priority traffic a faster pipe within the SuperCluster (always a good thing). It will also reduce congestion in the slower pipes within the SuperCluster (also a good thing). Being able to do so for minimal extra cost, or even no extra cost at all? Priceless! | |
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tmc8080
join:2004-04-24
Floral Park, NY
| Bragging rights? What does this really do for the end subscriber? It's nothing more than crotch-grabbing style bragging rights.. so say, "We can send 100 gigabits of data thousands of miles.. but can't get more than a few megabits to the "last mile" so I'm really unimpressed. Until that translated into DEPLOYED 100 megabit symmetrical connections for anyone who wants one.. DIRT CHEAP.. STFU. | |
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MattE
Obama '08
Premium
join:2003-07-20
Jamestown, NC
·North State Commun..
 ·Corporate Colocation
| Re: Bragging rights? said by tmc8080 :What does this really do for the end subscriber? It's nothing more than crotch-grabbing style bragging rights.. so say, "We can send 100 gigabits of data thousands of miles.. but can't get more than a few megabits to the "last mile" so I'm really unimpressed. Until that translated into DEPLOYED 100 megabit symmetrical connections for anyone who wants one.. DIRT CHEAP.. STFU. And where do you think all that 100Mbps symmetrical traffic has to go? Across backbone links like this one.
The backbone has to be in place before you can deliver the speeds to the end user. | |
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| | smcallah
join:2004-08-05
Home
| Re: Bragging rights? said by MattE :And where do you think all that 100Mbps symmetrical traffic has to go? Across backbone links like this one. The backbone has to be in place before you can deliver the speeds to the end user. Oh, you mean there's not a magical 100mbit connection direct from my house to any site on the Internet? | |
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MattE
Obama '08
Premium
join:2003-07-20
Jamestown, NC
·North State Commun..
·Corporate Colocation
| Re: Bragging rights? said by smcallah :said by MattE :And where do you think all that 100Mbps symmetrical traffic has to go? Across backbone links like this one. The backbone has to be in place before you can deliver the speeds to the end user. Oh, you mean there's not a magical 100mbit connection direct from my house to any site on the Internet? Well, you might be special. | |
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| | tmc8080
join:2004-04-24
Floral Park, NY
| said by MattE : And where do you think all that 100Mbps symmetrical traffic has to go? Across backbone links like this one. The backbone has to be in place before you can deliver the speeds to the end user. Why test along the eastern U.S.? That's not where the bandwidth is needed.. you need bandwidth criss-crossing the east-west and north-south corridors in the other two time zones further west. I never see my full 20/5 cap across the U.S. which is why those links need to be upgraded. Some backbone providers still have cross city & cross country fiber links as low as 10megabits asymmetrical! There are dozens of Pedabits of available infrastructure along the eastern corridor, compared with a few thousand Gigabits under peak traffic out west. This is another reason why Comcast & AT&T's plans for next generation broadband are so luke-warm.. the infrastructure would choke to death if people actually tried to use those speeds. There needs to be a window of about 5 years to get some of these links upgraded to the best fiber routing equipment made today. Of course we don't see flashy press releases about efforts to retool state to state backbone links such as Ohio-Texas, Pennsylvania to Nevada to California, etc.. that is slow, slogging hard work.. | |
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l3fiber
@comcast.net
| Re: Bragging rights? said by tmc8080 :Why test along the eastern U.S.? That's not where the bandwidth is needed.. you need bandwidth criss-crossing the east-west and north-south corridors in the other two time zones further west. A physical test like this doesn't matter where it is. It is a trial.
said by tmc8080 : I never see my full 20/5 cap across the U.S. which is why those links need to be upgraded. Some backbone providers still have cross city & cross country fiber links as low as 10megabits asymmetrical! There are dozens of Pedabits of available infrastructure along the eastern corridor, compared with a few thousand Gigabits under peak traffic out west. This is another reason why Comcast & AT&T's plans for next generation broadband are so luke-warm.. Cross country bandwidth is upgraded at the same pace of coastal bandwidth. The reason you don't see higher speeds at distance is because of 1) speed of light latency, 2) maximum packet size in applications, systems and networks and 3) the way TCP works.
It has little to do with cross country bandwidth. As broadband speed increases the next issues to understand are the above factors. People complain about cross country and international latency, but speed of light is a little hard to increase. | |
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MattE
Obama '08
Premium
join:2003-07-20
Jamestown, NC |  Time Warner also testing this ...
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| espaeth
Misanthrope
Premium
join:2001-04-21
Minneapolis, MN
·Embarq
·Comcast
| Re: Time Warner also testing this ... Dense Wave Division Multiplexing (DWDM) is just "colorization" of the light into various wavelengths so that you can have multiple connections all share the same physical fiber strand. You shoot in each color using frequency tuned lasers on one side and you use a prism to break the light out into optical ports at the destination. The magic is how precise the prism and lasers need to be manufactured to be able to work with narrow wavelength bands.
The interesting aspect of this story is the 100GigE part which is a significant upgrade from the n x 10GigE or OC768 40G solutions today. The DWDM solution using ROADM technology is is old news. | |
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Comcast Tests 100-Gig Optical Links