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cisco dynamic bandwidth sharing

Mon, 09/19/2011 - 06:23 — bigmike12

Hello all,

I am trying to figure out how dynamic bandwidth sharing works.

If I have this config...

interface Integrated-Cable6/0/0:0
cable dynamic-bw-sharing
cable rf-bandwidth-percent 50
interface Integrated-Cable6/0/0:1
cable dynamic-bw-sharing
cable rf-bandwidth-percent 50
interface Integrated-Cable6/0/0:2
cable dynamic-bw-sharing
cable rf-bandwidth-percent 50
interface Integrated-Cable6/0/0:3
cable dynamic-bw-sharing
cable rf-bandwidth-percent 50

interface Wideband-Cable6/0/0:0
cable dynamic-bw-sharing
cable rf-channel 0 bandwidth-percent 46
cable rf-channel 1 bandwidth-percent 46
cable rf-channel 2 bandwidth-percent 46
cable rf-channel 3 bandwidth-percent 46

From what I gather, this means that 50% of each channel is "reserved" for Docsis2.0 narrowband traffic, however, if it is not used, it may be utilized by wideband Docsis3.0 users.

Is this statement correct?

Appreciate the help.

Regs,
Mike

Fri, 09/23/2011 - 11:21 — tadeusz.ciesielski

For that you would need something like this :
cable rf-channel 3 bandwidth-percent 50 remaining ratio 100
Check out this :
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_dyn_b...

Mon, 09/26/2011 - 06:15 — mbowe

> From what I gather, this means that 50% of each channel is "reserved" for
> Docsis2.0 narrowband traffic, however, if it is not used, it may be utilized
> by wideband Docsis3.0 users.

Yes that's how I understand it also.

The narrow and wide interfaces can burst into each others allocations if there is capacity going spare.

The allocations only become static when you do not have "cable dynamic-bw-sharing" enabled.