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DOCSIS 3.0 Channel Bonding – Your Questions Answered

Episode 3 Hosted by Brady Volpe of The Volpe Firm and Nimble This with Guest John Downey of Cisco.  Brady and John will discuss the many advantages and disadvantages of DOCSIS 3.0 channel bonding. When everything is operating properly, we have great advantages for modem speed and operation at the expense of allocating more spectrum for more DOCSIS 3.0 channels. When things are not going well, we may not be aware or we may not have the expertise to troubleshoot the situation or even remedy the issues properly.

DOCSIS 3.0 Upstream and Downstream bonding have many “pros”:

  • More channels for load balancing of DOCSIS 1.x and 2.0 cable modems provides more aggregate speed to share.
  • More channels for DOCSIS 3.0 bonding for better “peak” speed and bigger “pipe” has better oversubscription calculations.
  • More channels gives a layer of redundancy/availability.

With all “pros” comes some “cons”:

  • Downstream bonded modems still only use 1 downstream as a primary and of that primary downstream goes down or lower MER, the modem will reset.
  • Upstream bonded cable modems are different in that they use all upstream channels for station maintenance and in-a-way are all “primary”

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