I have recently set up a small DOCSIS lab, using a uBR7225 with an MC88V card. It is configured in an 8x4 bonding group, and all of my various modems come up just fine. I cannot seem to get any modem to work higher than 100mbps on the downstream, and I am looking for some tuning suggestions. Here are snippets of the configuration:
controller Integrated-Cable 1/0
rf-channel 0 cable downstream channel-id 100
rf-channel 0 frequency 501000000 annex B modulation 256qam interleave 32
rf-channel 0 rf-power 44.0
no rf-channel 0 rf-shutdown
rf-channel 1 cable downstream channel-id 101
rf-channel 1 frequency 507000000 annex B modulation 256qam interleave 32
rf-channel 1 rf-power 44.0
no rf-channel 1 rf-shutdown
rf-channel 2 cable downstream channel-id 102
rf-channel 2 frequency 513000000 annex B modulation 256qam interleave 32
rf-channel 2 rf-power 44.0
no rf-channel 2 rf-shutdown
rf-channel 3 cable downstream channel-id 103
rf-channel 3 frequency 519000000 annex B modulation 256qam interleave 32
rf-channel 3 rf-power 44.0
no rf-channel 3 rf-shutdown
!
controller Integrated-Cable 1/1
rf-channel 0 cable downstream channel-id 110
rf-channel 0 frequency 525000000 annex B modulation 256qam interleave 32
rf-channel 0 rf-power 44.0
no rf-channel 0 rf-shutdown
rf-channel 1 cable downstream channel-id 111
rf-channel 1 frequency 531000000 annex B modulation 256qam interleave 32
rf-channel 1 rf-power 44.0
no rf-channel 1 rf-shutdown
rf-channel 2 cable downstream channel-id 112
rf-channel 2 frequency 537000000 annex B modulation 256qam interleave 32
rf-channel 2 rf-power 44.0
no rf-channel 2 rf-shutdown
rf-channel 3 cable downstream channel-id 113
rf-channel 3 frequency 543000000 annex B modulation 256qam interleave 32
rf-channel 3 rf-power 44.0
no rf-channel 3 rf-shutdown
interface Wideband-Cable1/0:0
cable bundle 1
cable rf-channel 0 bandwidth-percent 1 remaining ratio 100
cable rf-channel 1 bandwidth-percent 1 remaining ratio 100
cable rf-channel 2 bandwidth-percent 1 remaining ratio 100
cable rf-channel 3 bandwidth-percent 1 remaining ratio 100
cable rf-channel controller 1 channel 0 bandwidth-percent 1 remaining ratio 100
cable rf-channel controller 1 channel 1 bandwidth-percent 1 remaining ratio 100
cable rf-channel controller 1 channel 2 bandwidth-percent 1 remaining ratio 100
cable rf-channel controller 1 channel 3 bandwidth-percent 1 remaining ratio 100
!
interface Integrated-Cable1/0:0
cable bundle 1
cable rf-bandwidth-percent 1
!
interface Integrated-Cable1/0:1
cable bundle 1
cable rf-bandwidth-percent 1
!
interface Integrated-Cable1/0:2
cable bundle 1
cable rf-bandwidth-percent 1
!
interface Integrated-Cable1/0:3
cable bundle 1
cable rf-bandwidth-percent 1
!
interface Wideband-Cable1/1:0
cable bundle 1
cable rf-channel 0 bandwidth-percent 1 remaining ratio 100
cable rf-channel 1 bandwidth-percent 1 remaining ratio 100
cable rf-channel 2 bandwidth-percent 1 remaining ratio 100
cable rf-channel 3 bandwidth-percent 1 remaining ratio 100
!
interface Integrated-Cable1/1:0
cable bundle 1
cable rf-bandwidth-percent 1
!
interface Integrated-Cable1/1:1
cable bundle 1
cable rf-bandwidth-percent 1
!
interface Integrated-Cable1/1:2
cable bundle 1
cable rf-bandwidth-percent 1
!
interface Integrated-Cable1/1:3
cable bundle 1
cable rf-bandwidth-percent 1
!
cable fiber-node 1
downstream Integrated-Cable 1/0 rf-channel 0-3
downstream Integrated-Cable 1/1 rf-channel 0-3
upstream Cable 1 connector 0-3
!