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 pokesphIt Is Almost FastPremium
join:2001-06-25
Sacramento, CA
kudos:1 | useless unless.. while DOCSIS 3.0 will be a welcome update, it's pointless to deploy it if Comcast doesn't do something about loading/routing all it's customer connections on greatly overloaded peering connections, which, in some areas, are the magor bottlenecks we current see.
Inferstructure / backend also needs to be increased.. something they can do now. | |
 espaethDigital PlumberPremium,MVM
join:2001-04-21
Minneapolis, MN
kudos:2
 ·Clear Wireless
| said by pokesph:while DOCSIS 3.0 will be a welcome update, it's pointless to deploy it if Comcast doesn't do something about loading/routing all it's customer connections on greatly overloaded peering connections, which, in some areas, are the magor bottlenecks we current see. Inferstructure / backend also needs to be increased.. something they can do now. The Comcast backbone has never been the problem. Look at any traceroute in the Comcast forum and look at all the te-9-x-ar01 and similar devices in the traceroute. te is the short interface descriptor for 10GigE links on Cisco hardware. Their national backbone is n x 10GigE, their ISP peering connections are also 10GigE. Comcast was out reviewing the Cisco CRS-1 platform a couple rooms down from our company while we were out meeting with Cisco in San Jose. (The CRS BU is in building 16 on the campus)
Comcast has been upgrading their national backbone by converting all of their markets onto their ibone infrastructure. Minneapolis just converted a few months back, going from only having connectivity via ATT to having a full mesh of connectivity via ATT, Level(3), and Gblx. Details on their national network has been documented by a number of sources, including Comcast's own Investor Day presentations.
The biggest bottleneck is still the same thing that it's always been: 38/38mbps per downstream channel and 9/27mbps per upstream channel for DOCSIS 1.x/2.0 respectively. For improvements at the last mile Comcast (and every other MSO) is at the mercy of CableLabs and the equipment vendors. | |
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