I configured the load balancing in the following manner:
I created a cable spectrum group:
cable spectrum-group beta
band 30000000 50000000
load-balancing static
bsr2#show cable spectrum-group
Spectrum Group: beta
Member channels:
Cable 0/0 U0
Cable 0/0 U1
Cable 0/0 U2
Cable 0/0 U3
Schedule Band Schedule
Id (Mhz) From Time To Time
1 30.000 - 50.000
The following is the output of the command show cable modem summary total before I activated the load ballancing:
bsr2#show cable modem show cable modem s t
Interface Total Active Registered SpecGrp Group
Modems Modems Modems Name Id Cable 0/0/U0 91 0 86 beta 0
Cable 0/0/U1 172 1 155 beta 0
Cable 0/0/U2 163 0 148 beta 0
Cable 0/0/U3 209 1 189 beta 0
Total 635 2 578
I activated the load ballancing with the following command:
bsr2#cable load-balance spectrum-group beta
It seemed that works:
bsr2#show cable modem show cable modem s t
Interface Total Active Registered SpecGrp Group
Modems Modems Modems Name Id Cable 0/0/U0 141 0 134 beta 0
Cable 0/0/U1 161 0 144 beta 0
Cable 0/0/U2 159 0 144 beta 0
Cable 0/0/U3 174 1 153 beta 0
Total 635 1 575
But after less than a minute the modems began resuming to their original upstream:
Cable 0/0/U0 139 0 103 beta 0
Cable 0/0/U1 161 0 144 beta 0
Cable 0/0/U2 160 1 144 beta 0
Cable 0/0/U3 175 2 153 beta 0
Total 635 3 544
Cable 0/0/U0 110 0 94 beta 0
Cable 0/0/U1 172 8 147 beta 0
Cable 0/0/U2 163 3 145 beta 0
Cable 0/0/U3 190 15 155 beta 0
Total 635 26 541
Cable 0/0/U0 94 0 87 beta 0
Cable 0/0/U1 172 0 155 beta 0
Cable 0/0/U2 163 1 147 beta 0
Cable 0/0/U3 206 10 177 beta 0
Total 635 11 566
Finally the state was the same as at the beginning:
Cable 0/0/U0 92 0 87 beta 0
Cable 0/0/U1 172 1 155 beta 0
Cable 0/0/U2 163 1 147 beta 0
Cable 0/0/U3 208 2 187 beta 0
Total 635 4 576
Failed to solve the problem of load balancing.
What did I do wrong?
is the return all from the same plant? can you send me a show ver and a show run? show tech would be great
cmcaldas@gmail.com
Thank You for tip about the same cable plant.
I hadn't known about this thing until you wrote me your comment.
Later I read an important sentence in the Cisco 's documentation too:
"Load balancing can be done only on upstreams and downstreams that share physical connectivity
with the same group of cable modems."
I will try this feature soon. I will inform you about possible failure or success.
Granted mine is in a lab setup, but the same downstream/upstream.
cable spectrum-group group1
band 5000000 42000000
load-balancing static
interface cable 0/0
ip address 10.10.8.1 255.255.248.0
ip address 192.168.69.1 255.255.255.0 secondary host
ip address 192.169.70.1 255.255.255.0 secondary host
ip address 192.169.71.1 255.255.255.0 secondary host
ip address 192.169.72.1 255.255.255.0 secondary mta
cable helper-address 172.18.109.254 cable-modem
cable helper-address 172.18.109.254 host
cable helper-address 172.18.109.254 mta
no shutdown
cable downstream 0 power-level 500
cable downstream 0 rate-limit
no cable downstream 0 shutdown
cable upstream 0 physical-delay automatic
cable upstream 0 spectrum-group group1
cable upstream 0 rate-limit
no cable upstream 0 shutdown
no cable upstream 0/0 shutdown
cable upstream 0/1 channel-type atdma
cable upstream 0/1 shutdown
cable upstream 0/2 shutdown
cable upstream 0/3 shutdown
cable upstream 1/0 channel-type atdma
cable upstream 1 channel-width 6400000
cable upstream 1 pre-equalization
cable upstream 1 physical-delay automatic
cable upstream 1 spectrum-group group1
cable upstream 1 ingress-canceller enable
cable upstream 1/0 range-backoff 2 8
cable upstream 1 map-interval 2000
cable upstream 1/0 modulation-profile 255
cable upstream 1 rate-limit
cable upstream 1 snr-offset 10
no cable upstream 1 shutdown
no cable upstream 1/0 shutdown
cable upstream 1/1 channel-type atdma
cable upstream 1/1 modulation-profile 255
no cable upstream 1/1 shutdown
cable upstream 1/2 shutdown
cable upstream 1/3 shutdown
cable upstream 2/0 channel-type scdma
cable upstream 2 channel-width 6400000
cable upstream 2 pre-equalization
cable upstream 2 physical-delay automatic
cable upstream 2 spectrum-group group1
cable upstream 2/0 range-backoff 2 8
cable upstream 2 map-interval 2000
cable upstream 2/0 modulation-profile 501
cable upstream 2 rate-limit
cable upstream 2/0 active-codes 128
cable upstream 2/0 codes-minislot 32
cable upstream 2/0 spread-interval 4
no cable upstream 2 shutdown
no cable upstream 2/0 shutdown
cable upstream 2/1 shutdown
cable upstream 2/2 shutdown
cable upstream 2/3 shutdown
cable upstream 3/0 channel-type scdma
cable upstream 3 channel-width 6400000
cable upstream 3 pre-equalization
cable upstream 3 physical-delay automatic
cable upstream 3 spectrum-group group1
cable upstream 3/0 range-backoff 2 8
cable upstream 3 map-interval 2000
cable upstream 3/0 modulation-profile 501
cable upstream 3 rate-limit
cable upstream 3/0 active-codes 128
cable upstream 3/0 codes-minislot 32
cable upstream 3/0 spread-interval 4
no cable upstream 3 shutdown
no cable upstream 3/0 shutdown
cable upstream 3/1 shutdown
cable upstream 3/2 shutdown
cable upstream 3/3 shutdown
cable invited-ranging-attempts 0
cable ucd-interval 2000
no cable concatenation docsis-1.0
cable dynamic-service authorization-mode authorize
cable dynamic-service active-timeout 300
ip dhcp relay information option
host authorization on
dhcp leasequery authorization on
cable downstream schedule priority-wfq
no cable wireless downstream modulation qpsk
!
BSR2k#sh cab modem sum tot
Interface Total Active Registered SpecGrp Group
Modems Modems Modems Name Id
Cable 0/0/U0 16 0 16 group1 0
Cable 0/0/U1 9 1 8 group1 0
Cable 0/0/U2 4 0 4 group1 0
Cable 0/0/U3 6 0 6 group1 0
Total 35 1 34