Table Of Contents
Cisco uBR7246 Universal Broadband Features Commands
cable downstream interleave-depth
cable spectrum-group frequency
show interface cable signal-quality
Cisco uBR7246 Universal Broadband Features Commands
This chapter describes the commands used to configure the Cisco uBR7246 Universal Broadband features. For uBR7246 Universal Broadband configuration information and examples, refer to the "Configuring Cisco uBR7246 Universal Broadband Features" chapter in the Voice, Video and Home Applications Configuration Guide.
cable arp
To activate cable Address Resolution Protocol (ARP), use the cable arp cable interface configuration command. Use the no form of this command to disable cable ARP.
cable arp
no cable arp
Syntax Description
This command has no arguments or keywords.
Default
ARP enabled
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
ARP is an Internet protocol used to map IP addresses to MAC addresses on computers and other equipment installed in a network. You need to activate ARP requests so the Cisco uBR7246 can perform IP address resolution on the downstream path.
Example
This following example activates cable ARP requests for port 0 on the cable modem installed in slot 6:
configure terminalinterface cable 6/0cable arpcable channel-change
To move a cable modem to another channel, use the cable channel-change cable interface configuration command. Use the no form of this command to disable this feature.
cable channel-change sid channel
no cable channel-change sid channel
Syntax Description
Default
0
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Moving a cable modem to a new channel can improve performance, increase bandwidth availability, or troubleshoot a cable modem. You use the SID to identify a particular cable modem.
Example
The following example changes a cable modem channel allocation from SID 50 to 0:
interface cable 6/0cable channel-change 50 0cable downstream annex
To set the MPEG framing format for a downstream port on a cable modem card to either Annex A (Europe) or Annex B (North America), use the cable downstream annex cable interface configuration command.
cable downstream annex {A | B}
Syntax Description
Default
Annex B
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
The MPEG framing format must be compatible with the downstream symbol rate you set. Annex B is the North America standard and Annex A is the European standard. You should review your local standards and specifications for downstream MPEG framing to determine which format you should use.
Note
The cable modem card downstream ports and the cable modems on the HFC network connected through these ports must be set to the same MPEG framing format.
Example
The following example sets the MPEG framing format to Annex A:
interface cable 6/0cable downstream annex Acable downstream frequency
To set the fixed center frequency for downstream RF carrier in Hz, enter the cable downstream frequency cable interface configuration command. Use the no form of this command to set no fixed center frequency.
cable downstream frequency down-freq-hz
no cable downstream frequency
Syntax Description
down-freq-hz
The known center frequency of the downstream carrier in Hz. The valid range is 54,000,000 to 1,020,000,000 Hz.
Default
Disabled
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
You need to set the downstream frequency of your RF output to comply with the expected input frequency of your upconverter. To do this, you enter the fixed center frequency of the downstream RF carrier for a downstream port. (You can also select a default which does not set a specific fixed value.) The valid range for a fixed center frequency is 54,000,000 to 1,020,000,000 Hz. The center frequency is also used to configure an IF-to-RF upconverter that must be installed in your downstream path.
To calculate the center frequency, add the frequencies in Hz of the lowest channel and the highest channel available at your headend. Divide that number by 2. The typical range for current CATV headends is 88,000,000 to 860,000,000 Hz; the MCNS specification is 94,000,000 to 860,000,000 Hz.
Note
Example
The following example sets the downstream center frequency:
interface cable 6/0cable downstream frequency 96000000cable downstream if-output
To activate a downstream port on a cable modem card for digital data transmissions over the HFC network, use the cable downstream if-output cable interface configuration command. Use the no form of this command to disable the 44 MHz intermediate frequency (IF) carrier.
cable downstream if-output
no cable downstream if-output
Syntax Description
This command has no arguments or keywords.
Default
Downstream carrier enabled
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following example enables the downstream port 0 on the cable modem installed in slot 6:
interface cable 6/0cable downstream if-outputcable downstream interleave-depth
To set the downstream interleave depth, use the cable downstream interleave-depth cable interface configuration command. Use the no form of this command to restore the default.
cable downstream interleave-depth {8 | 16 | 32 | 64 | 128}
no cable downstream interleave-depth
Syntax Description
8 | 16 | 32 | 64 | 128
Indicates the amount of time (in milliseconds) that defines the downstream interleave depth. The default is 32.
Default
32
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
This command sets the minimum latency of the system. Higher interleave depth provides more protection from bursts of noise on the HFC network; however, higher depth also increases downstream latency. shows interleave characteristics.
I
Example
The following example configures the downstream interleave depth to 128:
interface cable 6/0cable downstream interleave-depth 128cable downstream modulation
To set the modulation rate for a downstream port on a cable modem card, use the cable downstream modulation cable interface configuration command:
cable downstream modulation {64qam}
Syntax Description
Default
64qam
Command Mode
Cable interface configuration
Usage Guidelines
This command was added in Cisco IOS Release 11.3 XA.
Downstream modulation is the speed at which downstream data travels to the user; by setting the downstream modulation, you define the speed, which is 64qam (6 bits per downstream symbol rate, which is the standard Multimedia Cable Network Systems (MCNS) rate).
Note
Example
The following example sets the downstream modulation:
interface cable 6/0cable downstream modulation 64cable downstream symbol-rate
To set the megasymbols per second (Msps) rate for a downstream port on a cable modem card, use the cable downstream symbol-rate cable interface configuration command. Use the no form of this command to restore the default.
cable downstream symbol-rate number
no cable downstream symbol-rate
Syntax Description
number
Number of megasymbols per second (Msps) rate for a downstream port. The valid range is 0 to 6000000 Msps.
Default
5056941 symbols per second (sps) with 64-QAM and 5360537 sps for 256-QAM.
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
A symbol is the basic unit of modulation. QPSK encodes 2 bits per symbol, 16-QAM encodes 4 bits per symbol, 64-QAM encodes 6 bits per symbol, and 256-QAM encodes 8 bits per symbol. The valid range for the downstream symbol rate is 0 to 6,000,000 Msps.
Caution
Example
The following example sets the downstream symbol rate to 5056941 symbols per second (sps) to comply with MCNS specifications for Annex B:
interface cable 6/0cable downstream symbol-rate 5056941cable insertion-interval
To limit the amount of time that a cable modem can request a channel for the first time from the Cisco uBR7246, use the cable insertion-interval cable interface configuration command. Use the no form of this command to restore the default value fro this command.
cable insertion-interval milliseconds
no cable insertion-interval
Syntax Description
milliseconds
Amount of time in milliseconds the cable modem can request a channel. Valid entries are from 100 to 2000 milliseconds.
Default
2000 milliseconds
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
When a cable modem connects to the HFC network, it requests a channel from the Cisco uBR7246. Use the cable insertion-interval command to limit the amount of time that a cable modem requests a channel for the first time from the Cisco uBR7246. A cable modem's initial channel request is known as insertion.
Example
The following example limits the amount of time that a cable modem can request a channel for the first time from the Cisco uBR7246 (insertion-interval) to 1500 milliseconds:
interface cable 6/0cable insertion-interval 1500cable ip-multicast-echo
To enable IP multicast echo, use the cable ip-multicast-echo cable interface configuration command. Use the no form of this command to disable IP multicast echo.
cable ip-multicast-echo
no cable ip-multicast-echo
Syntax Description
This command has no arguments or keywords.
Default
IP multicast echo is enabled.
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following example activates IP multicast echo:
interface cable 6/0cable ip-multicast-echocable ip-broadcast-echo
To activate upstream IP broadcast echo so the Cisco uBR7246 can echo broadcast packets, use the cable ip-broadcast-echo cable interface configuration command. Use the no form of this command to disable the upstream IP broadcast echo.
cable ip-broadcast-echo
no cable ip-broadcast-echo
Syntax Description
This command has no arguments or keywords.
Default
IP broadcast echo is disabled
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following example activates IP broadcast echo:
interface cable 6/0cable ip-broadcast-echocable privacy kek grace-time
To set key encryption keys (keks) grace-time values for baseline privacy on an HFC network, use the cable privacy kek grace-time global configuration command. Use the no form of this command to restore the default value.
cable privacy kek grace-time [seconds]
no cable privacy kek grace-time
Syntax Description
seconds
(Optional) Number of seconds defining the length of key encryption grace-time. Valid range is 300 to 1800 seconds. Default is 600 seconds.
Default
600 seconds
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Baseline privacy on an HFC network is configured with key encryption keys (keks) and traffic encryption keys (teks). The encryption is based on 40-bit or 56-bit data encryption standard (DES) encryption algorithms.
A kek is assigned to a cable modem based on the cable modem's service identifier (SID) and permits the cable modem to connect to the Cisco uBR7246 when baseline privacy is activated. Keks can be set to expire based on a grace-time or a life-time value. A grace-time key is used to assign a temporary key to a cable modem to access the network.
A cable modem must renew its kek (grace-seconds) before it expires.
Example
The following example sets kek privacy grace-time to 800 seconds:
configure terminalcable privacy kek grace-time 800cable privacy kek life-time
To set key encryption keys (keks) life-time values for baseline privacy on an HFC network, use the cable privacy kek life-time global configuration command. Use the no form of this command to restore the default value.
cable privacy kek life-time [seconds]
no cable privacy kek life-time
Syntax Description
seconds
(Optional) Number of seconds defining the length of the key encryption life-time.Valid range is 86400 to 6048000. Default is 604800 seconds.
Default
604800 seconds
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Baseline privacy on an HFC network is configured with key encryption keys (keks) and traffic encryption keys (teks). The encryption is based on 40-bit or 56-bit data encryption standard (DES) encryption algorithms.
A kek is assigned to a cable modem based on the cable modem's service identifier (SID) and permits the cable modem to connect to the Cisco uBR7246 when baseline privacy is activated. Keks can be set to expire based on a grace-time or a life-time value. A life-time key is used to assign a more permanent key to a cable modem. Each cable modem that has a life-time key assigned will request a new life-time key from the Cisco uBR7246 before the current one expires.
A cable modem must renew its kek (lifetime-seconds) before it expires.
Example
The following example sets kek privacy life-time to 750,000 seconds:
configure terminalcable privacy kek life-time 750000cable privacy tek grace-time
To set traffic encryption keys (teks) grace-time values for baseline privacy on an HFC network, use the cable privacy tek grace-time global configuration command. Use the no form of this command to restore the default value.
cable privacy tek grace-time [seconds]
no cable privacy tek grace-time
Syntax Description
seconds
(Optional) Number of seconds defining the length of traffic encryption grace-time. Valid range is 300 to 1800 seconds. Default is 600 seconds.
Default
600 seconds
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Baseline privacy on an HFC network is configured with key encryption keys (keks) and traffic encryption keys (teks). The encryption is based on 40-bit or 56-bit data encryption standard (DES) encryption algorithms.
The tek is assigned to a cable modem when its kek has been established. The tek is used to encrypt data traffic between the cable modem and the Cisco uBR7246. Teks can be set to expire based on a grace-time or a life-time value. A grace-time key is used to assign a temporary key to a cable modem to access the network.
A cable modem must renew its tek (grace-seconds) before it expires.
Example
The following example sets traffic encryption key grace-time to 800 seconds:
configure terminalcable privacy tek grace-time 800cable privacy tek life-time
To set traffic encryption keys (teks) grace-time and life-time values for baseline privacy on an HFC network, use the cable privacy tek life-time global configuration command. Use the no form of this command to restore the default value.
cable privacy tek life-time [seconds]
no cable privacy tek life-time
Syntax Description
seconds
(Optional) Number of seconds defining the length of the traffic encryption lifetime.Valid range is 1800 to 6048000. Default is 43200 seconds.
Default
43,200 seconds
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Baseline privacy on an HFC network is configured with key encryption keys (keks) and traffic encryption keys (teks). The encryption is based on 40-bit or 56-bit data encryption standard (DES) encryption algorithms.
The tek is assigned to a cable modem when its kek has been established. The tek is used to encrypt data traffic between the cable modem and the Cisco uBR7246. Teks can be set to expire based on a grace-time or a life-time value. A life-time key is used to assign a more permanent key to a cable modem. Each cable modem that has a life-time key assigned will request a new life-time key from the Cisco uBR7246 before the current one expires.
A cable modem must renew its tek (life-time second) before it expires.
Example
The following example sets traffic encryption key life-time to 43,200 seconds:
configure terminalcable privacy tek life-time 43200cable proxy-arp
To activate cable proxy Address Resolution Protocol (ARP) on the cable interface, use the cable proxy-arp cable interface configuration command. Use the no form of this command to disable this feature.
cable proxy-arp
no cable proxy-arp
Syntax Description
This command has no arguments or keywords.
Default
Disabled
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Because the downstream and upstream are separate interfaces, modems can not directly perform address resolution with other modems on the cable plant. This command allows modems to perform address resolution through a proxy.
Example
The following example activates proxy ARP for host-to-host communications:
interface cable 6/0cable proxy-arpcable shared-secret
To enable cable modem authentication, use the cable shared-secret cable interface configuration command. Use the no form of this command to disable cable modem authentication.
cable shared-secret secret-key
no cable shared-secret
Syntax Description
Default
Null string
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Use this command to activate authentication so that all cable modems must return a known text string to register with the Cisco uBR7246 for access to the network.
Example
The following example activates cable modem authentication, using "scoobee" as the shared secret key:
interface cable 6/0cable shared-secret scoobeecable spectrum-group
To create a spectrum group, use the cable spectrum-group global configuration command. Use the no form of this command to disable this spectrum group.
cable spectrum-group group-number type {blind | scheduled | daily periodic-sec seconds}
no cable spectrum-group group-number type {blind | scheduled | daily periodic-sec seconds}
Syntax Description
Default
No spectrum group is defined.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Upstream traffic may be affected by noise or other cable plant impairment. The spectrum manager monitors the upstream traffic. If station maintenance messages from cable modems are not received for approximately 2.5 minutes, then the spectrum manager reassigns a different upstream frequency to the upstream channel.
Frequency agility is configured and activated using spectrum groups. A spectrum group is a table of frequencies that can be used by upstream ports to implement a frequency-hopping policy. There are two types of policies, blind and scheduled, with two corresponding types of spectrum groups.
–
–
Note
A maximum of 32 spectrum groups can be configured in the system.
Example
The following example creates spectrum groups and sets the periodic rate to 48000 seconds:
configure terminalcable spectrum-group 1 type blindcable spectrum-group 2 type scheduled dailycable spectrum-group 3 type scheduled periodic-sec 48000cable spectrum-group frequency
To configure a list of upstream frequencies and nominal power levels that each spectrum group can use when an upstream frequency change is necessary, use the cable spectrum-group frequency global configuration command. Use the no form of this command to delete a spectrum group list.
cable spectrum-group group-number [time hh:mm:ss] frequency up-freq-hz
[power-level-dbmv]
no cable spectrum-group group-numberSyntax Description
Default
Operator must determine a value based on the spectrum allocation plan.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
After you create a spectrum group, you need to configure a list of upstream frequencies and nominal power levels that each spectrum group can use when an upstream frequency change is necessary. Each spectrum group should have its own list of upstream frequencies. Valid frequencies are 5,000,000 to 42,000,000 Hz, and valid power levels are -10 dBmV to 10 dBmV. The power level value should only be changed if you want to change only the power level as part of spectrum management. The standard power level is 0 dBmV.
Example
The following example creates spectrum group frequencies:
configure terminalcable spectrum-group 1 frequency 6500000cable spectrum-group 1 frequency 7000000dcable spectrum-group 2 frequency 750000 -5cable spectrum-group 3 time 02:00:00 frequency 9000000cable spectrum-group 3 time 02:00:00 frequency 9500000 -5endcable source-verify
To activate cable modem upstream verification, use the cable source-verify cable interface configuration command. Use the no form of this command to disable the display of this information.
cable source-verify
no cable source-verify
Syntax Description
This command has no arguments or keywords.
Default
Disabled
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Use this command to ensure that only known cable modems on the HFC network can transmit upstream data to a Cisco uBR7246.
Example
The following example activates cable upstream verification:
configure terminalinterface cable 6/0cable source-verifycable upstream fec
To enable the upstream forward error correction (FEC), use the cable upstream fec cable interface configuration command. Use the no form of this command to disable FEC.
cable upstream port fec
no cable upstream port fec
Syntax Description
Default
FEC is disabled.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
The Cisco uBR7246 uses forward error correction (FEC) to attempt to correct any upstream data that might have been corrupted. To use this feature, you need to activate FEC on the upstream RF carrier. When FEC is activated, the Cisco uBR7246 commands all cable modems on the network to activate FEC.
Example
The following example activates upstream forward error correction:
configure terminalinterface cable 6/0cable upstream 0 fecRelated Commands
cable upstream frequency
cable upstream power level
cable upstream scrambler
cable upstream shutdowncable upstream frequency
To enter a fixed frequency of the upstream RF carrier for an upstream port, use the cable upstream frequency cable interface configuration command. Use the no form of this command to restore the default value for this command.
cable upstream port frequency up-freq-hz
no cable upstream port frequency up-freq-hz
Syntax Description
Default
Upstream center frequency is not configured to a fixed value.
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
You need to set the upstream frequency of your RF output to comply with the expected input frequency of your Cisco MC11 cable modem. You do this by entering a fixed frequency of the upstream RF carrier for an upstream port. The valid range for a fixed upstream frequency is 5,000,000 Hz to 42,000,000 Hz.
Example
The following example configures the upstream center frequency for port 0 (located in slot 6) to 5,700,000 Hz:
interface cable 6/0cable upstream 0 frequency 5700000cable upstream power-level
To set the input power level for the upstream RF carrier in decibels per millivolt (dBmV), use the cable upstream power-level cable interface configuration command. Use the no form of this command to restore the default configuration value for this command.
cable upstream port power-level dbmv
no cable upstream port power-level dbmv
Syntax Description
Default
Upstream nominal input power level is configured to 0 dBmV
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
The power level of the upstream signal has to match MC11 cable modems expected input power levels. Because of this, you need to set the nominal input power level for the upstream RF carrier in decibels per millivolt (dBmV). You can also select the default of 0 dBmV, which is the optimal setting for the upstream power level.
The valid range for the input power level is -10 dBmV to 10 dBmV. Higher values cause the modems to increase their transmit power, achieving a greater carrier-to-noise ratio (CNR). If your power levels operate at greater than 10 dBmV, you must use an in-line attenuator to bring the power level to within the valid range.
Caution
Example
The following example sets the upstream input power level:
interface cable 6/0cable upstream 0 power-level -5Related Commands
cable upstream fec
cable upstream frequency
cable upstream scrambler
cable upstream shutdowncable upstream scrambler
To enable the cable upstream scrambler, use the cable upstream scrambler cable interface configuration command. Use the no form of this command to restore the default configuration value for this command.
cable upstream port scrambler
no cable upstream port scrambler
Syntax Description
Default
Upstream scrambler disabled
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
You need to activate the scrambler on the upstream RF carrier so that the cable modems on the HFC network will use built-in scrambler circuitry for upstream data transmissions. The scrambler circuitry improves reliability of the upstream receiver on the cable modem card. This command causes modems to enable their pseudo-random scrambler circuitry to improve the robustness of the upstream receiver on the line card.
Caution
Example
The following example activates the upstream scrambler:
interface cable 6/0cable upstream 0 scramblerRelated Commands
cable upstream fec
cable upstream frequency
cable upstream power level
cable upstream shutdowncable upstream shutdown
To disable the upstream port, use the cable upstream shutdown cable interface configuration command. Use the no form of this command to enable the upstream port.
cable upstream port shutdown
no cable upstream port shutdown
Syntax Description
Default
Upstream port enabled
Command Mode
Cable interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following example disables the upstream ports:
interface cable 6/0cable upstream 0 shutdownshow cable burst-profile
To display the upstream data burst profiles used to configure the upstream PHY, use the show cable burst-profile privileged EXEC command.
show cable burst-profile
Syntax Description
This command has no arguments or keywords.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following is sample output from the show cable burst-profile command:
router# show cable burst-profileBurst Type Preamb Diff FEC err FEC Scrambl Max Guard Last Scrambl profile length encode correct codeword seed burst time codewordnumber length size size shortened1 1 48 no 0x0 0x6 0x152 1 16 1 yes2 1 48 no 0x0 0x6 0x152 1 12 1 no3 1 48 no 0x5 0x2C 0x152 0 48 1 yes4 1 48 no 0x5 0x2C 0x152 0 48 1 yes5 1 48 no 0x5 0x32 0x152 0 20 1 yes6 1 48 no 0x0 0x32 0x152 0 20 1 noTable 1 describes the fields shown in the show cable burst-profile display.
Related Commands
show cable modem
show cable modulation profile
show cable privacy
show cable qos
show cable spectrum-groupshow cable modem
To view configuration settings on the Cisco uBR7246, use the show cable EXEC command.
show cable modem [ip-address]
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
This command displays information on all cable modems or a particular cable modem on the network.
Example
The following are sample outputs from the show cable modem command specifying two different IP addresses:
router# show cable modem 172.16.0.0Interface Upstream Timing offset SID QoS IP address MAC addressCable6/0 U0 2851 1 2 1.1.1.5 00e0.1eab.2c0bCable6/0 U0 2850 2 2 1.1.1.7 00e0.1eb2.bb07Cable6/0 U0 2852 3 2 1.1.1.2 00e0.1eab.2c29Cable6/0 U0 2851 4 2 1.1.1.6 00e0.1eb2.bb8fCable6/0 U0 2851 5 2 1.1.1.3 00e0.1eb2.bb53Cable6/0 U0 2852 6 2 1.1.1.4 00e0.1eb2.bbb1router# show cable modem 1.1.1.5Interface Upstream Timing offset SID QoS IP address MAC addressCable6/0 U0 2851 1 2 1.1.1.5 00e0.1eab.2c0bTable 2 describes the fields shown in the show cable modem display.
Related Commands
show cable burst-profile
show cable modulation-profile
show cable privacy
show cable qos
show cable spectrum-groupshow cable modulation-profile
To display modulation profile group information, use the show cable modulation-profile privileged EXEC command.
show cable modulation-profile
Syntax Description
This command has no arguments or keywords.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
This command displays modulation profile group information. A modulation profile is a collection of six burst profiles that are sent out in a UCD message to configure a modem's transmit parameters for the following upstream message types: request, request/data, initial maintenance, station maintenance, short grant, and long grant.
Example
The following is sample output from the show cable modulation-profile command:
router# show cable modulation-profileModulation profile group Interval usage code Burst profile number1 1 11 3 31 4 41 5 51 6 6Table 3 describes the fields shown in the show cable modulation-profile display.
.
Related Commands
show cable burst-profile
show cable modem
show cable privacy
show cable qos
show cable spectrum-groupshow cable privacy
To display baseline privacy information, use the show cable privacy privileged EXEC command.
show cable privacy {tek | kek}
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following are sample outputs for the show cable privacy command:
router# show cable privacy tekConfigured TEK life-time value = 56000Configured TEK grace-time value = 900router# show cable privacy kekConfigured KEK life-time value = 750000Configured KEK grace-time value = 800Table 4 describes the fields shown in the show cable privacy displays.
Related Commands
show cable burst-profile
show cable modem
show cable spectrum-group
show modulation-profile
show cable qosshow cable qos
To display information about the quality of service (QoS), use the show cable qos privileged EXEC command.
show cable qos
Syntax Description
This command has no arguments or keywords.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following is sample output from the show cable qos command:
router# show cable qosService Priority Max upstream Guarantee upstream Max downstream Max txclass bandwidth bandwidth bandwidth burst1 7 0 0 0 02 7 2000000 100000 4000000 0Table 5 describes the fields shown in the show cable qos display.
Related Commands
show cable burst-profile
show cable modem
show cable spectrum-group
show modulation-profileshow cable spectrum group
To display spectrum group information, use the show cable spectrum-group privileged EXEC command.
show cable spectrum group [group-number]
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Use this command to display spectrum group information. Spectrum groups are used to manage frequency agility. The automatic reassignment of upstream channels when a channel shows loss of signal quality.
Example
The following are sample outputs from two uses of the show cable spectrum-group command:
router# show cable spectrum-groupspectrum-group 16 .500 MHz 0 dBmV input level7 .000 MHz 0 dBmV input level7 .500 MHz 0 dBmV input levelspectrum-group 27 .000 MHz -10 dBmV input level7 .000 MHz -5 dBmV input level7 .000 MHz 0 dBmV input level7 .000 MHz 5 dBmV input level7 .000 MHz 10 dBmV input levelrouter# show cable spectrum-group 1spectrum-group 16 .500 MHz 0 dBmV input level7 .000 MHz 0 dBmV input level7 .500 MHz 0 dBmV input levelTable 6 describes the fields shown in the show cable spectrum-group displays.
Related Commands
show cable burst-profile
show cable modem
show cable modulation-profile
show cable privacy
show cable qosshow controllers cable
To display information about a specific cable modem card slot's interface controllers, use the show controllers cable privileged EXEC command.
show controllers cable slot/port [downstream | upstream [channel]]
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following is sample output from the show controllers cable command for the cable modem located in slot 3/port 0:
router# show controllers cable 3/0Cable3/0: Downstream is up2422977 packets output, 126650143 bytes, 0 discarded0 output errorsHardware is CMTS Line Cardidb 0x6099DFD8 MAC regs 0x3CC80000 PLX regs 0x3CC00000rx ring entries 64 tx ring entries 128 MAP tx ring entries 128Rx ring 0x4B0607C0 shadow 0x60A64BF8 head 5Tx ring 0x4B060A00 shadow 0x60A64D68 head 47 tail 47 count 0MAP Tx ring 0x4B060E40 shadow 0x60A655D8 head 80 tail 80 count 0MAP timer sourced from slot 6throttled 0 enabled 0 disabled 0Rx: spurious 0 framing_err 0 hcs_err 0 no_buffer 0no_enqueue 0 no_enp 0 miss_count 2 latency 2Tx: full 0 drop 0 stuck 0 latency 0MTx: full 0 drop 0 stuck 0 latency 0Slots 2134 NoUW 1 Uncorr 0 Corr 0Req 96524429 ReqColl 0 ReqNoise 0Rng 494 RngColl 0 RngNoise 1MAP FIFO overflow 0, Rx FIFO overflow 0Bandwidth Requests= 0x47BPiggyback Requests= 0x2Ranging Requests= 0x1ECTiming Offset = 0x1Table 7 describes the fields applicable to the Cisco uBR7246 shown in the show controllers cable display.
The following is sample output for the downstream connection for slot 3 on port 0 from the show controllers cable downstream command:
router# show controllers cable 3/0 downstreamCable 3/0 Downstream is upFrequency not set, Channel Width 6 MHz, 64-QAM,Symbol Rate 5.056941 MspsFEC ITU-T J.83 Annex A, R/S Interleave I=12, J=17Table 8 describes the fields shown in the show controllers cable downstream display.
The following is sample output for the upstream connection for slot 3 on port 0 from the show controllers cable upstream command:
router# show controllers cable 3/0 upstream 0Cable3/0 Upstream 0 is upFrequency 7.008 MHz, Channel Width 1.6 MHz, QPSK Symbol Rate 1.280 MspsNominal Input Power Level 0 dBmV, Tx Timing Offset 0Ranging Backoff Start 0, Ranging Backoff End 3, Tx Backoff Start 2Tx Backoff End 8, Modulation Profile Group 1part_id=0x3136, rev_id=0x02, rev2_id=0x61nb_agc_thr=0x0100, nb_agc_nom=0x3000Range Load Reg Size=0x44Request Load Reg Size=0x0CDES Reg #580 = E204301, #584 = 3E030303, #588 = 0#590 = C0C0C0CTable 9 describes the fields shown in the show controllers cable upstream display.
show interface cable
To display cable interface information, use the show interface cable privileged EXEC command:
show interface cable port/slot [downstream | upstream]
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following is sample output for the cable modem located in slot 6/port 0 from the show interface cable command:
router# show interface cable 6/0Cable6/0 is up, line protocol is upHardware is BCM3210 FPGA, address is 00e0.1e5f.7a60 (bia 00e0.1e5f.7a60)Internet address is 1.1.1.3/24MTU 1500 bytes, BW 27000 Kbit, DLY 1000 usec, rely 255/255, load 1/255Encapsulation, loopback not set, keepalive not setARP type: ARPA, ARP Timeout 04:00:00Last input 4d07h, output 00:00:00, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 drops5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec10908 packets input, 855000 bytes, 0 no bufferReceived 3699 broadcasts, 0 runts, 0 giants, 0 throttles3 input errors, 3 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort5412 packets output, 646488 bytes, 0 underruns0 output errors, 0 collisions, 13082 interface resets0 output buffer failures, 0 output buffers swapped out
Table 10 describes the fields shown in the show interface cable display.
The following is sample output for the downstream cable interface of slot 6 on port 0 from the show interface cable downstream command:
router# show interface cable 6/0 downstreamCable6/0: Downstream is up111947771 packets output, 1579682655 bytes, 0 discarded0 output errorsTable 11 describes the fields shown in the show controllers cable downstream display.
The following is sample output for the upstream cable interface located in slot 6/port 0 from the show interface cable upstream command:
router# show interface cable 6/0 upstreamCable6/0: Upstream 0 is upReceived 3699 broadcasts, 0 multicasts, 28586 unicasts0 discards, 0 errors, 0 unknown protocol21817 packets error-free, 2371 corrected, 8097 uncorrectable0 noise, 0 microreflectionsCBR_queue_depth: [not implemented], ABR_queue_depth: [not implemented],UBR[1]_queue_depth: 0, UBR[2]_queue_depth: 0,UBR[3]_queue_depth: 0, POLLS_queue_depth: [not implemented]ADMIN_queue_depth: [not implemented]Last Minislot Stamp (current_time_base):190026 FLAG:1Last Minislot Stamp (scheduler_time_base):200706 FLAG:1Table 12 describes the fields shown in the show interface cable upstream display.
Related Commands
show interface cable sid
show interface cable signal-qualityshow interface cable signal-quality
To display information about the signal quality, use the show interface cable signal-quality privileged EXEC command:
show interface cable slot/port signal-quality
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following is sample output from the show interface signal quality command:
router# show interface cable 6/0 signal-qualityCable6/0: Upstream 0 is up includes contention intervals: TRUE
Table 13 describes the fields shown in the show controllers cable upstream display.
Table 13 Show Interface Cable Signal Quality Field Descriptions
Cable
Interface name.
Upstream is up includes contention intervals
States whether this statement is true.
Related Commands
show interface
show interface cable downstream
show interface cable sid
show interface cable upstreamshow interfaces cable sid
To display information by service identifier (SID) of each cable modem on the network, use the show interface sid privileged EXEC command:
show interfaces cable slot/port sid [sid-number]
Syntax Description
slot/port
Identifies the slot number and downstream port number.
sid-number
(Optional) Identifies the service identification number.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following are sample outputs from two uses of the show interface cable sid command:
router# show interface cable 6/0 sidSID Status QoS Creattime Inoctets Inpackets IP address MAC address1 enable 2 57 80139964 101336 1.1.1.5 00e0.1eab.2c0b2 enable 2 57 49132 649 1.1.1.7 00e0.1eb2.bb073 enable 2 58 80042891 100555 1.1.1.2 00e0.1eab.2c29router# show interface cable 6/0 sid 1SID Status QoS Creattime Inoctets Inpackets IP address MAC address1 enable 2 57 80140204 101340 1.1.1.5 00e0.1eab.2c0bIf the value for the QoS group in the display appears as 0, it indicates that a temporary SID has been assigned to a cable modem that is in the process of connecting to the network:
router# show interface cable 6/0 sidSID Status QoS Creattime Inoctets Inpackets IP address MAC address1 enable 0 57 80140204 101340 1.1.1.5 00e0.1eab.2c0bIf there are no cable modems connected to the cable interface you have selected, the display will appear as follows:
router# show interface cable 6/0 sidSID Status QoS Creattime Inoctets Inpackets IP address MAC address1 Not in use
Note
Table 14 describes the fields shown in the output for the show interface cable sid displays.
Related Commands
show interface cable signal-quality
show diag
To display the revision level information for the cable line card, use the show diag privileged EXEC command.
show diag
Syntax Description
There are no arguments or keywords for this command.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following is sample output from the show diag command displaying revision level information for the cable line card (slot 6):
router# show diagSlot 6:MC11 port adapter, 1 portPort adapter is analyzedPort adapter insertion time 02:37:10 agoHardware Revision : 1.2Part Number : 800-02455-02Board Revision : 03Deviation Number : 0-3Fab Version : 03PCB Serial Number : 00004500239RMA Test History : 00RMA Number : 0-0-0-0RMA History : 00Calibration Data : Minimum: -8 dBmV, Maximum: 8 dBmVCalibration values : 0x5D43 0x3F05 0x1794Unknown Field (type 0083): 83 FF FF FFEEPROM format version 4EEPROM contents (hex):0x00: 04 FF 40 00 F1 41 01 02 C0 46 03 20 00 09 97 020x10: 42 30 33 80 00 00 00 03 02 03 C1 8B 30 30 30 300x20: 34 35 30 30 32 33 39 03 00 81 00 00 00 00 04 000x30: C8 09 F8 08 03 5D 43 3F 05 17 94 83 83 FF FF FF0x40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FFTable 15 describes the fields shown in the show diag display.
show c7200
To display the revision level information for the Cisco uBR7246 midplane, use the show c7200 privileged EXEC command.
show c7200
Syntax Description
There are no arguments or keywords for this command.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following is sample output from the show c7200 command. The midplane EEPROM data describes the characteristics of the device's midplane chassis; the CPU EEPROM data describes the characteristics of the device's CPU. The fault history buffer data provides diagnostic information used only by Cisco Customer Support Engineers.
router# show c7200Network IO Interrupt Throttling:throttle count=0, timer count=0active=0, configured=0netint usec=3999, netint mask usec=200UBR7200 Midplane EEPROM:Number of Slots : 6Hardware Revision : 1.1Chassis MAC Address : 0008.cefb.fc00MAC Address block size : 256Unknown Field (type 01B9): 2C 1F E0 00Unknown Field (type 01B8): 85 FF FF FFEEPROM format version 4EEPROM contents (hex):0x00: 04 FF 40 00 F0 01 06 41 01 01 C3 06 00 08 CE FB0x10: FC 00 43 01 00 C7 20 45 53 00 29 00 2E 00 3D 000x20: 4C 00 34 00 36 00 87 00 81 00 83 00 86 00 84 000x30: B6 00 E0 00 00 B8 DB 00 B9 2C 1F E0 00 00 B8 850x40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FFC7200 CPU EEPROM:Hardware revision 2.1 Board revision A0Serial number 4371856 Part number 73-1536-03Test history 0x0 RMA number 00-00-00EEPROM format version 1EEPROM contents (hex):0x20: 01 15 02 01 00 42 B5 90 49 06 00 03 00 00 00 000x30: 50 00 00 00 FF FF FF FF FF FF FF FF FF FF FF FFFault History Buffer:7200 Software (UBR7200-P-M), Experimental Version 11.3(19980514:205205)[johnchen-spydrman_2 232]Compiled Fri 12-Jun-98 19:20 by johnchenSignal = 23, Code = 0x24, Uptime 00:02:09$0 : 00000000, AT : 00000000, v0 : 00000000, v1 : 00000004a0 : 00000000, a1 : 0000FF00, a2 : 00000006, a3 : 00000002t0 : 00000020, t1 : 3401FF01, t2 : 3401C100, t3 : FFFF00FFt4 : 6027E180, t5 : 30443044, t6 : 30384330, t7 : 30783630s0 : 00000000, s1 : 608BFD88, s2 : 606D9E4C, s3 : 60B43E0Cs4 : 608BFD88, s5 : 0000004A, s6 : 00000000, s7 : 608BFF9Ct8 : 00009BCB, t9 : 00000000, k0 : 3041D001, k1 : BF800000gp : 6083B400, sp : 60BC4CA0, s8 : 608BFDF8, ra : 602797ECEP6027AE58, SREG : 3401FF03, Cause : 00000424
