Step 1 | enable
Example:
Router> enable
|
Enables privileged EXEC mode.
- Enter your password
if prompted.
|
Step 2 | configure
terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3 | cable
rf-adapt
timer
general
time
Example:
Router(config)# cable rf-adapt timer general 1
|
(Optional) Sets the timer for cable modem upstream RF adaptation.
- general
time—Specifies the period when
the RF adaptation process examines the physical layer statistics of all modems
on RF adaptation-enabled upstream channels. The valid range is from 1 to 300
seconds.
|
Step 4 | cable
rf-adapt
timer
candidate
time
Example:
Router(config)# cable rf-adapt timer candidate 2
|
(Optional) Sets the timer for cable modem upstream RF adaptation.
- candidate
time—Specifies the period when
the RF adaptation process examines the physical layer statistics of modems
flagged as downgrade or upgrade candidates, or both. The valid range is from 1
to 300 seconds.
|
Step 5 | cable
rf-adapt
timer
relocation
time
Example:
Router(config)# cable rf-adapt timer relocation 300
|
(Optional) Sets the timer for cable modem upstream RF adaptation.
- relocation
time—Specifies the period when
the RF adaptation process performs a single relocation of a candidate modem
from its current upstream channel to the appropriate destination. The valid
range is from 1 to 300 seconds.
|
Step 6 | interface
cable
{slot/cable-interface-index
|
slot/subslot/cable-interface-index}
Example:
Router(config)# interface cable 8/0/0
|
Enters interface configuration mode.
-
slot—Slot where the line card
resides.
- Cisco uBR7225VXR
router—The valid value is 1 or 2.
- Cisco uBR7246VXR
router—The valid range is from 3 to 6.
- Cisco uBR10012
router—The valid range is from 5 to 8.
-
subslot—(Cisco uBR10012 only)
Secondary slot number of the cable interface line card. The valid subslot is 0
or 1.
-
cable-interface-index—Downstream
port of the Cisco uBR10-MC5X20 and Cisco uBR-MC88V line cards, or MAC domain
index of the Cisco UBR-MC20X20V and Cisco uBR-MC3GX60V line cards.
- Cisco uBR7225VXR and Cisco uBR7246VXR routers—The valid
port value is 0 or 1.
- Cisco uBR10012 router—The valid range for the Cisco
UBR-MC20X20V and Cisco uBR-MC5X20 line cards is from 0 to 4. The valid range
for the Cisco uBR-MC3GX60V line card is from 0 to 14.
|
Step 7 | cable
upstreamportmax-logical-chans
code
Example:
Router(config-if)# cable upstream 0 max-logical-chans 2
|
Enables multiple logical channels on the physical upstream
channel intended for RF adaptation.
- port —Upstream port. The valid range
is from 0 to 3.
- code —Number of logical channels per
port. The valid values are 1 and 2.
|
Step 8 | cable
upstream
port
rf-adapt
Example:
Router(config-if)# cable upstream 0 rf-adapt
|
Enables RF adaptation on the physical upstream channel.
- port—Upstream port. The valid range
is from 0 to 3.
|
Step 9 | cable
upstream
port
threshold
rf-adapt
threshold1-in-percent
Example:
Router(config-if)# cable upstream 0 threshold rf-adapt 25
|
(Optional) Sets the RF adaptation percentage threshold.
- port —Upstream port. The valid range
is from 0 to 3.
- rf-adapt—Specifies the ratio of
candidate cable modems to total number of upstream cable modems, which disables
further RF adaptation.
- threshold1-in-percent—RF adapt
disable threshold in percentage. The valid range is from 1 to 50.
Note
|
You can bypass the RF adapt disable threshold by setting it to
0.
|
|
Step 10 | cable
upstreamportthresholdsnr-profilessnr-threshold1
snr-threshold2
Example:
Router(config-if)# cable upstream 0 threshold snr-profiles 25 0
|
(Optional) Specifies the MER (SNR) threshold in dB.
-
snr-threshold1—MER (SNR) threshold
for the primary modulation profile specified for the upstream. The valid range
is from 5 to 35 dB, with a default value of 25 dB.
Note
|
You can bypass the primary MER (SNR) threshold
(snr-threshold1-in-db) by setting it to 0.
|
-
snr-threshold2—MER (SNR) threshold
for the secondary modulation profile specified for the upstream. The valid
range is from 5 to 35 dB, with a default value of 25 dB. For the Cable Modem
Upstream RF Adaptation feature, it is recommended to set this value to 0.
Note
| snr-threshold2
is ignored by the Cable Modem Upstream RF Adaptation
feature.
|
|
Step 11 | cable
upstreamportthresholdhysteresishysteresis-value
Example:
Router(config-if)# cable upstream 0 threshold hysteresis 3
|
(Optional) Specifies the hysteresis value.
|
Step 12 | cable
upstreamportthreshold
corr-fecfec-corrected
Example:
Router(config-if)# cable upstream 0 threshold corr-fec 2
|
(Optional) Specifies the allowable number of correctable FEC
errors for the upstream.
-
fec-corrected —Allowable number of
correctable FEC errors for the upstream, given as a percentage of total packets
received on the upstream during the polling period. It is given as a percentage
of total packets received on the upstream during the polling period. The valid
range is from 1 to 30 percent, with a default value of 3 percent.
Note
|
You can bypass the corr-fec threshold by setting the value
to 0.
|
|
Step 13 | cable
upstreamportthreshold
uncorr-fecfec-uncorrected
Example:
Router(config-if)# cable upstream 0 threshold uncorr-fec 10
|
(Optional) Specifies the allowable number of uncorrectable FEC
errors for the upstream.
-
fec-uncorrected —Allowable number of
uncorrectable FEC errors for the upstream, given as a percentage of total
packets received on the upstream during the polling period. The valid range is
from 1 to 30 percent of total packets, with a default of 1 percent.
Note
|
You can bypass the uncorr-fec threshold by setting the value
to 0.
|
|
Step 14 | cable
upstream
port
logical-channel-index
rf-adapt [primary
|
secondary]
Example:
Router(config-if)# cable upstream 0 0 rf-adapt primary
|
(Optional) Specifies the primary upstream logical channel and the
secondary upstream logical channel.
|
Step 15 | no
cable
upstream
portlogical-channel-index
shutdown
Example:
Router(config-if)# no cable upstream 0 1 shutdown
|
Performs a “no shutdown” on logical channel 1.
|
Step 16 | end
Example:
Router(config-if)# end
|
Exits the interface configuration mode and returns to privileged
EXEC mode.
|