Table Of Contents
Cisco uBR7246 Universal Broadband Router Feature Enhancements
number of days
Specifies how many days of cable modem performance is retained in the flap list. Valid values are from 1-60 days.
cable flap-list insertion-time
cable flap-list power-adjust threshold
number
Specifies the number of modems that report flap performance to the flap-list table. Valid values are from 1-8191.
IP-address
The IP address of a DHCP server.
cable-modem
Specifies that only cable modem UDP broadcasts are forwarded.
host
Specifies that only host UDP broadcasts are forwarded.
cable spectrum-group frequency
cable spectrum-group hop period
groupnum
Spectrum group number. Valid values are from 1 to 32.
1-3600 seconds
Specifies the frequency-hop time period. Valid values are from 1 to 3600 seconds.
cable spectrum-group hop threshold
groupnum
Spectrum group number. Valid values are from 1 to 32.
1-100 percent
(Optional) Specifies the hop threshold. Valid range of modems is 1 to 100%.
cable upstream data-backoff automatic
cable upstream data-backoff start end
portnum
Port number.
start
Specifies the start value. Valid values are from 0 to 15.
end
Specifies the end value. Valid values are from 0 to 15.
cable upstream modulation-profile
cable upstream range-backoff automatic
cable upstream range-backoff start end
mac-addr
(Optional) MAC address. Specify the 48-bit hardware address of an individual cable modem.
all
(Optional) Remove all modems from the flap-list table.
sort-flap
(Optional) Sorted by number of times the cable modem has flapped.
sort-time
(Optional) Sorted most recent time the cable modem is detected to have flapped.
ip-address
(Optional) Specify the IP address of the modem.
mac-address
(Optional) Specify the MAC address of the modem.
groupnum
(Optional) Display information about the specified group number. If no group number is specified, information for all spectrum groups is displayed.
show controllers cable upstream
slot/port
Slot number/port number indicating the location of the Cisco MC11 cable modem card.
upstream
(Optional) Displays upstream interface status.
port
(Optional) Selects specific upstream port.
slot/port
Identifies the uBR7200 chassis slot number and downstream port number. Valid values are from 3 to 6.
sid-number
(Optional) Identifies the service identification number.
show interface cable signal-quality
slot/port
Identifies the uBR7200 chassis slot number and downstream port number. Valid values are from 3 to 6.
Cisco uBR7246 Universal Broadband Router Feature Enhancements
Feature Summary
The enhancements to the Cisco uBR7246 cable router extend and improve the command line interface (CLI). It supports burst profile, quality of service (QoS), improved parameter configuration, and the MC11 modem card.
Downstream QoS handling is compliant with Multimedia Cable Network System (MCNS) requirements, and upstream QoS handling and Spectrum Management have been improved.
The Cisco uBR7246 now supports multicast authentication via RADIUS, and security has been enhanced for baseline privacy (including MCNS Data Over Cable System Interface Specification (DOCSIS) compliance). Also, this cable router now supports Dynamic Host Configuration Protocol (DHCP) Relay Subscriber ID Insertion.
Benefits
These enhancements to the Cisco uBR7246 cable router bring value to the digital broadband network by:
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Supporting burst profile configuration.
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Platforms
This feature is supported on the Cisco uBR7246 router only.
Prerequisites
Complete the basic configuration of the Cisco uBR7246 as described in the Cisco uBR7246 Universal Broadband Router Installation and Configuration Guide and the Voice, Video, and Home Applications Configuration Guide.
Supported MIBs and RFCs
The Cisco uBR7246 features support the Radio Frequency (RF) Interface Management Information Base (MIB). For descriptions of supported MIBs and how to use MIBs, see Cisco's MIB website on Cisco Connection Online (CCO) at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml. No RFCs are supported by this feature.
Configuration Tasks
The configuration tasks required by this version of the Cisco uBR7246 cable router are the same as those described in the Cisco uBR7246 Universal Broadband Router Installation and Configuration Guide and the Voice, Video, and Home Applications Configuration Guide.
Verify
The verification tasks required by this version of the Cisco uBR7246 cable router are the same as those described in the Cisco uBR7246 Universal Broadband Router Installation and Configuration Guide and the Voice, Video, and Home Applications Configuration Guide.
Note the following:
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Configuration Examples
Refer to the Cisco uBR7246 Universal Broadband Router Installation and Configuration Guide and the Voice, Video, and Home Applications Configuration Guide for configuration examples.
Command Reference
This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 11.3 command references.
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cable 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 | 256qam}
Syntax Description
Default
64qam.
Command Mode
Cable interface configuration
Usage Guidelines
This command was added in Cisco IOS Release 11.3 XA.
Downstream modulation defines the modulation type used in for downstream traffic. Specifying the symbol rate indirectly influences the interface speed: at 64qam, the interface speed is 6xx bits/second. Specifying 256qam sets the interface speed to 8xx bits/second.
Note
Example
The following example sets the downstream modulation:
Router(config-if) cable downstream modulation 64cable flap-list aging
To specify the number of days to age the cable modem from the flap-list table, use the cable flap-list aging global configuration command. Use the no form of this command to disable this feature.
cable flap-list aging number of days
no cable flap-list agingSyntax Description
number of days
Specifies how many days of cable modem performance is retained in the flap list. Valid values are from 1-60 days.
Default
None.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
A flap list is a table maintained by the Cisco uBR7246 for every modem (active or not) that is having communication difficulties. (Flapping refers to the rapid disconnecting and reconnecting of a cable modem that is having problems holding a connection.) The flap list contains modem MAC addresses and logs the time of the most recent activity. You can configure the size and entry thresholds for the flap list.
Example
The following example specifies that the flap-list table retain two days of performance for this cable modem:
Router(config)# cable flap-list aging 2Related Commands
cable flap-list insertion time
cable flap-list size
cable flap-list power-adjust threshold
cable flap-list miss-threshold
clear cable flap-listcable flap-list insertion-time
To set the insertion time interval, use the cable flap-list insertion-time global configuration command. Use the no form of this command to disable insertion time.
cable flap-list insertion-time seconds
no cable flap-list insertion-timeSyntax Description
Default
None.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. This command controls the operation of a flapping modem detector. When the link establishment rate of a modem is shorter than the period defined by this command, the modem is placed in the flap list.
Example
The following example sets the insertion time interval to 62 seconds:
Router(config)# cable flap-list insertion-time 62Related Commands
cable flap-list size
cable flap-list power-adjust threshold
cable flap-list aging
cable flap-list miss-threshold
clear cable flap-listcable flap-list power-adjust threshold
To specify the power-adjust threshold for recording a flap-list event, use the cable flap-list power-adjust threshold global configuration command. Use the no form of this command to disable power-adjust thresholds.
cable flap-list power-adjust threshold dBmV
no cable flap-list power-adjust thresholdSyntax Description
Default
None.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. This command controls the operation of a flapping modem detector. When the power adjustment of a modem exceeds the threshold, the modem is placed in the flap list.
Example
The following example the following command sets the power-adjust threshold to 1:
Router(config)# cable flap-list power-adjust threshold 1Related Commands
cable flap-list insertion time
cable flap-list size
cable flap-list aging
cable flap-list miss-threshold
clear cable flap-listcable flap-list size
To specify the maximum number of modems reported in the flap-list table, use the cable flap-list size global configuration command. Use the no form of this command to specify the default flap-list table size.
cable flap-list size number
no cable flap-list sizeSyntax Description
number
Specifies the number of modems that report flap performance to the flap-list table. Valid values are from 1-8191.
Default
8192.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example limits the flap-list table size to no more than 2 modems:
Router(config)# cable flap-list size 2Related Commands
cable flap-list size
cable flap-list power-adjust threshold
cable flap-list aging
cable flap-list miss-threshold
clear cable flap-listcable helper-address
To specify a destination address for User Datagram Protocol (UDP) broadcast (DHCP) packets, use the cable helper-address interface configuration command. Use the no form of this command to disable this feature.
cable helper-address IP-address {cable-modem | host}
no cable helper-address IP-address {cable-modem | host}Syntax Description
IP-address
The IP address of a DHCP server.
cable-modem
Specifies that only cable modem UDP broadcasts are forwarded.
host
Specifies that only host UDP broadcasts are forwarded.
Default
None.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. If you specify a secondary interface address, the giaddr field in the DHCP requests will be sent to the primary address for DHCP requests received from cable modems, and to the secondary IP address for DHCP requests received from hosts.
Examples
The following example forwards UDP broadcasts from cable modems to the DHCP server at 172.23.66.44:
Router(config-if)# cable helper-address 172.23.66.44 cable-modemThe following example forwards UDP broadcasts from hosts to the DHCP server at 172.23.66.44:
Router(config-if)# cable helper-address 172.23.66.44 hostcable insertion-interval
To set the time between opportunities for cable modems to request a connection from the Cisco uBR7246, use the cable insertion-interval interface configuration command. Use the no form of this command to use the automatic setting and ignore any minimum or maximum time settings.
cable insertion-interval {automatic | [min] [max]}
no cable insertion-intervalSyntax Description
Default
automatic (dynamically varying the frequency of initial ranging upstream slots between 50 milliseconds to 2 seconds).
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. Use this command to configure the frequency at which the initial maintenance interval is to appear in MAP messages. MAP messages define the precise time intervals during which modems can transmit.
Use the automatic keyword with this command when you have to bring a lot of modems on line quickly (for example, after a major power failure). Override the automatic keyword by specifying an insertion interval.
Example
The following example shows the minimum time period between initial ranging slots of 25 milliseconds:
Router(config-if)# cable insertion-interval automatic 25Related Commands
cable insertion-interval
cable match address
To specify that IP multicast streams be encrypted, use the cable match address interface configuration command. Use the no form of this command if you do not want to use encryption.
cable match address access-list
no cable match addressSyntax Description
Default
None.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. Configure the access list using the ip access-list command.
Examples
The following example specifies that the multicast stream defined by the access list named reno be encrypted:
Router(config-if)# cable match address renoThe following example specifies that the multicast stream defined by the access list number 102 be encrypted:
Router(config-if)# cable match address 102Related Commands
ip access-list
cable modulation-profile
To define the modulation profile, use the cable modulation-profile global configuration command. Use the no form of this command to remove the specified modulation profile, except for modulation profile 1. In the case of modulation profile 1, the no form of this command sets all of the parameters in a burst to default values.
cable modulation-profile profile iuc fec-tbytes fec-len burst-len guard-t mod scrambler seed diff pre-len last-cw uw-len
no cable modulation-profile profile iuc fec-tbytes fec-len burst-len guard-t mod scrambler seed diff pre-len last-cw uw-lenSyntax Description
Default
None.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
CautionChanges to modulation profiles causes changes to the physical layer. Because changing physical layer characteristics affects router performance and function, this task should be reserved for expert users.
Example
The following example defines the burst parameters for profile 2 as follows:
The request burst is defined to have 0 fec-tbytes, 16 kbytes fec-len, a burst-len of 1, a guard time of 8, a mod value of qpsk, scrambler enabled with a seed value of 152, differential encoding is disabled, a preamble length of 64 bits, a fixed code word length, and 8-bit unique words for upstream unique word length. The remaining initial, station, short, and long bursts are defined in similar fashion for profile 2.
Router(config)# cable modulation-profile 2 request 0 16 1 8 qpsk scrambler 152 no-diff 64 fixed uw8Router(config)# cable modulation-profile 2 initial 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed uw16Router(config)# cable modulation-profile 2 station 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed uw16Router(config)# cable modulation-profile 2 short 6 75 6 8 16qam scrambler 152 no-diff 144 fixed uw8Router(config)# cable modulation-profile 2 long 8 220 0 8 16qam scrambler 152 no-diff 160 fixed uw8
Note
See for a description of the output display fields.
Related Commands
cable upstream modulation-profile
show cable modulation-profilecable privacy
To enable privacy in the system, use the cable privacy interface configuration command. Use the no form of this command to disable privacy.
cable privacy [mandatory | authenticate-modem | authorize-multicast]
no cable privacySyntax Description
Default
Mandatory.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. While the default for this command is enable privacy, it is not mandatory.
Examples
The following example displays the options available with this command:
Router(config-if)# cable privacy ?authenticate-modem turn on BPI modem authenticationauthorize-multicast turn on BPI multicast authorizationkek KEK Key Parmsmandatory force privacy be mandatorytek TEK Key ParmsThe following example turns on BPI modem authentication:
Router(config-if)# cable privacy authenticate-modemThe following example turns on BPI muticast authorization:
Router(config-if)# cable privacy authorize-multicastThe following example forces Baseline Privacy to be used for all modems:
Router(config-if)# cable privacy mandatoryRelated Commands
cable qos permission
To specify permission for updating the QoS table, use the cable qos permission global configuration command. Use the no form of this command to remove a previously enabled permission.
cable qos permission {create-snmp | modems | update-snmp}
no cable qos permissionSyntax Description
Default
Enable by modem and SNMP.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example enables modems to request arbitrary QoS parameters:
Router(config)# cable qos permission modemsRelated Commands
cable qos profile
show cable qos permission
show cable qos profilecable qos profile
To configure a QoS profile, use the cable qos profile global configuration command. Use the no form of this command to either set default values for profile group numbers 1 or 2, or remove the QoS profile if no specific parameters remain.
cable qos profile {groupnum | guaranteed-upstream | max-burst | max-upstream | max-downstream | priority | tos-overwrite | value}
no cable qos profile {groupnum | guaranteed-upstream | max-burst | max-downstream | priority | tos-overwrite | value}Syntax Description
Default
None.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Examples
The following examples configure QoS profile 4 with guaranteed upstream of 2 kbps, maximum transmission burst of 2, maximum downstream rate of 3 kbps, with a priority of 4, cable baseline privacy set, and a tos-overwrite mask and value byte (in hex) of 0x2:
Router(config)# cable qos profile 4 guaranteed-upstream 2Router(config)# cable qos profile 4 max-burst 2Router(config)# cable qos profile 4 max-downstream 3Router(config)# cable qos profile 4 priority 4Router(config)# cable qos profile 4 tos-overwrite 0x2Related Commands
cable qos permission
show cable qos profilecable relay-agent-option
To enable the system to insert the cable modem MAC address into a DHCP packet received from a modem or host and forward the packet to a DHCP server, use the cable relay-agent-option interface configuration command. Use the no form of this command to disable insertion.
cable relay-agent-option
no cable relay-agent-optionSyntax Description
This command has no keywords or arguments.
Default
no cable relay-agent-option.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. This functionality enables a DHCP server to identify the user (cable modem) sending the request and initiate appropriate action based on this information.
Example
The following example enables the insertion of DHCP relay agent information into DHCP packets:
Router(config-if)# cable relay-agent-optioncable shared-secret
To configure authentication and data privacy parameters, use the cable shared-secret interface configuration command. Use the no form of this command to disable authentication during the modem's registration phase.
cable shared-secret [0 | 7] authentication-key
no cable shared-secretSyntax Description
Default
no cable shared-secret.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Example
The following example activates cable modem authentication, using "3344912349988...sf" as the shared secret key and indicating that an encrypted message follows:
router(if-config)# cable shared-secret 7 3344912349988cisco@xapowenaspasdpuy230jhm...sfcable spectrum-group
To specify that the upstream ports share the same spectrum, use the cable spectrum-group global configuration command. Use the no form of this command to delete the spectrum group.
cable spectrum-group groupnum
no cable spectrum-group groupnumSyntax Description
Default
Upstream port frequency same for all ports in the spectrum group.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. Because this command forces upstream ports to use the same spectrum, do not use this command for overlapping carriers.
Example
The following example specifies that all the upstream ports for spectrum-group share the same spectrum:
Router(config)# cable spectrum-group 4cable spectrum-group band
To configure a continuous band setting for a spectrum group, use the cable spectrum-group band global configuration command. Use the no form of this command to delete the band settings for a spectrum group.
cable spectrum-group group-number [time day hh:mm:ss] [delete] band start-freq-hz end-freq-hz [power-level-dbmv]
no cable spectrum-group group-numberSyntax Description
Default
None.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA1. This command specifies that a continuous band setting be used as a unit of allocated spectrum within this spectrum group. Cable plants can choose to set up a daily schedule that changes the input power level and not the frequency.
Examples
The following example specifies that all the upstream ports for spectrum-group 4 share the same spectrum from 5000004 Hz to 40000000 Hz with a power level of 5 dBmV on Mondays at noon:
Router(config)# cable spectrum-group 4 time Monday 12:00:00 band 5000004 40000000 5The following example deletes the frequency band created in the previous example:
Router(config)# cable spectrum-group 4 time Monday 12:00:00 delete band 5000004 40000000 5cable spectrum-group frequency
To configure a spectrum group to use a center frequency, use the cable spectrum-group frequency global configuration command. Use the no form of this command to delete the configured frequency setting for this spectrum group.
cable spectrum-group groupnum [time day hh:mm:ss] [delete] frequency freq-hz [dBmV]
no cable spectrum-group groupnum [time day hh:mm:ss] [delete] frequency freq-hz [dBmV]Syntax Description
Default
None.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA1. A spectrum group allows the upstream frequency and input power level to change whenever noise impairs upstream traffic.
Cable plants can choose to set up a daily schedule that changes the input power level and not the frequency.
Example
The following example configures spectrum group 4 with an upstream frequency of 5000004 Hz and a power level of 5 dBmV:
Router(config)# cable spectrum-group 4 frequency 5000004 5cable spectrum-group hop period
To set the frequency-hop period, use the cable spectrum-group hop period global configuration command. Use the no form of this command to delete the frequency hop period for this spectrum group.
cable spectrum-group groupnum hop period 1-3600 seconds
no cable spectrum-group groupnum hop periodSyntax Description
groupnum
Spectrum group number. Valid values are from 1 to 32.
1-3600 seconds
Specifies the frequency-hop time period. Valid values are from 1 to 3600 seconds.
Default
300 seconds.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example sets the frequency hop period to 60 seconds:
Router(config)# cable frequency-hop period 60Related Commands
cable spectrum-group hop threshold
cable spectrum-group hop threshold
To specify a hop threshold for a spectrum group, use the cable spectrum-group hop threshold global configuration command. Use the no form of this command to delete the hop threshold for this spectrum group.
cable spectrum-group groupnum hop threshold [1-100 percent]
no cable spectrum-group groupnum hop thresholdSyntax Description
groupnum
Spectrum group number. Valid values are from 1 to 32.
1-100 percent
(Optional) Specifies the hop threshold. Valid range of modems is 1 to 100%.
Default
100 percent.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example limits the maximum number of modems to 2000:
Router(config)# cable spectrum-group hop threshold 2000Related Commands
cable spectrum-group hop period
cable upstream channel-width
To specify an upstream channel width, use the cable upstream channel-width interface configuration command. Use the no form of this command to set the channel width to 1600000 for a port number.
cable upstream portnum channel-width width
no cable upstream portnum channel-widthSyntax Description
Default
1600000 Hz.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example configures port 2 with a channel width of 200 kHz (which is equivalent to a symbol rate of 160 ksym/s):
Router(config-if)# cable upstream 2 channel-width 200000cable upstream data-backoff automatic
To specify start and stop values for data backoff, use the cable upstream data-backoff automatic interface configuration command. Use the no form of this command to use the default data backoff values.
cable upstream portnum data-backoff automatic
no cable upstream portnum data-backoff automaticSyntax Description
Default
0 (start), 4 (end).
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. Cisco recommends that you use this automatic setting.
Example
The following example sets the automatic values for port 2:
Router(config-if)# cable upstream 2 data-backoff automaticRelated Commands
cable upstream data-backoff start end
cable upstream data-backoff start end
To specify fixed starting and ending values for initial ranging backoff, use the cable upstream data-backoff start end interface configuration command. Use the no form of this command to apply default values.
cable upstream portnum data-backoff start end
no cable upstream portnum data-backoffSyntax Description
portnum
Port number.
start
Specifies the start value. Valid values are from 0 to 15.
end
Specifies the end value. Valid values are from 0 to 15.
Default
0 (start), 4 (end).
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. The start and end values are binary exponential algorithm parameters. Cisco recommends that you use the automatic setting.
Example
The following example configures upstream port 2 to use a data backoff start value of 2 and an end value of 4:
Router(config-if)# cable upstream 2 data-backoff 2 4Related Commands
cable upstream data-backoff automatic
cable upstream modulation-profile
To assign a modulation profile to an interface, use the cable upstream modulation-profile interface configuration command. Use the no form of this command to assign modulation profile 1 to the interface.
cable upstream portnum modulation-profile profile
no cable upstream portnum modulation-profileSyntax Description
Default
Modulation profile 1.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example assigns modulation profile 8 to interface 2:
Router(config-if)# cable upstream 2 modulation-profile 8Related Commands
cable modulation profile
cable upstream range-backoff automatic
To specify automatic initial ranging backoff calculation, use the cable upstream range-backoff automatic interface configuration command. Use the no form of this command to set default values.
cable upstream portnum range-backoff automatic
no cable upstream portnum range-backoffSyntax Description
Default
0 (start), 4 (end).
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example sets the range backoff to automatic for port 2:
Router(config-if)# cable upstream 2 range-backoff automaticRelated Commands
cable upstream range-backoff start end
cable upstream range-backoff start end
To configure the range for initial ranging backoff calculation, use the cable upstream range-backoff start end interface configuration command. Use the no form of this command to set default values.
cable upstream portnum range-backoff start end
no cable upstream portnum range-backoffSyntax Description
Default
Start value is 0, end value is 4.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. Cisco recommends that you use the automatic values.
Example
The following example sets the data backoff range to start at 2 and end at 4:
Router(config-if)# cable upstream 2 range-backoff 2 4Related Commands
cable upstream range-backoff automatic
clear cable flap-list
To reset the flap-list table, use the clear cable flap-list privileged EXEC configuration command.
clear cable flap-list [mac-addr | all]
Syntax Description
mac-addr
(Optional) MAC address. Specify the 48-bit hardware address of an individual cable modem.
all
(Optional) Remove all modems from the flap-list table.
Default
None.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example removes all the modems from the flap-list table:
Router# clear cable flap-list allRelated Commands
cable flap-list aging
cable flap-list insertion time
cable flap-list size
cable flap-list power-adjust threshold
cable flap-list miss-thresholdclear cable modem counters
To reset a cable modem's flapping counters to zero, use the clear cable modem counters privileged EXEC configuration command.
clear cable modem {mac-addr | ip-addr | all} counters
Syntax Description
Default
None.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example clears the counters for the modem at IP address 172.00.00.00:
Router# clear cable modem 172.00.00.00 countersRelated Commands
clear cable modem reset
clear cable modem reset
To remove a modem from the Station Maintenance List and reset the modem, use the clear cable modem reset privileged EXEC configuration command.
clear cable modem {mac-addr | ip-addr | all} reset
Syntax Description
Default
None.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA. This command causes the link to the modem to drop. The modem responds by resetting itself. It may take up to 30 seconds for the modem to start the reset sequence.
Example
The following example removes the cable modem at 172.00.00.00 from the Station Maintenance List:
Router# clear cable modem 172.00.00.00 resetRelated Commands
clear cable modem counters
ping cable-modem
To determine if a specific cable modem is on line, use the ping cable-modem privileged EXEC configuration command.
ping cable-modem mac-addr
Syntax Description
Default
None.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Example
The following example indicates that the cable modem at 172.00.00.00 is connected to the network and is operational:
Router# ping cable-modem 172.00.00.00172.00.00.00 is aliveshow cable flap-list
To display the cable flap-list, use the show cable flap-list privileged EXEC configuration command.
show cable flap-list [sort-flap | sort-time]
Syntax Description
sort-flap
(Optional) Sorted by number of times the cable modem has flapped.
sort-time
(Optional) Sorted most recent time the cable modem is detected to have flapped.
Default
None.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Sample Display
The following displays show the return for flap-list tables sorted by MAC address and by time:
router# show cable flap-list sort-flapMac Addr CableIF Ins Hit Miss CRC P-Adj Flap Time.1eab.2c0b C6/0 U0 108 318 27 0 0 108 Sep 10 15:26:56.1eb2.bb07 C6/0 U0 0 293 31 1 1 1 Sep 10 15:15:49.7b6b.71cd C6/0 U0 1 288 32 0 0 1 Sep 10 15:12:13.1eb2.bb8f C6/0 U0 1 295 30 0 0 1 Sep 10 15:11:44router#Router# show cable flap-list sort-timeMac Addr CableIF Ins Hit Miss CRC P-Adj Flap Time00e0.2222.2202 C4/0 U0 464 2069 242 0 421 885 Oct 16 22:47:230010.7b6b.57e1 C4/0 U0 0 2475 43 0 1041 1041 Oct 16 22:47:04Table 1
Show Cable flap-list Field Descriptions
Related Commands
ping docsis
show cable modem
To view configuration settings on the Cisco uBR7246, use the show cable EXEC command.
show cable modem [ip-address | mac-address]
Syntax Description
ip-address
(Optional) Specify the IP address of the modem.
mac-address
(Optional) Specify the MAC address of the modem.
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.
Sample Display
The following are sample outputs from the show cable modem command:
router# show cable modemInterface SID Online Timing Receive QoS IP address MAC addressState Offset PowerCable6/0/U0 1 online 3046 -2.00 4 10.30.128.35 0010.7b6b.7213Cable6/0/U0 2 online 3047 0.00 4 10.30.128.34 0010.7bb3.fbddCable6/0/U0 3 offline 3033 6.75 2 0.0.0.0 0020.4001.3e66describes the fields shown in the show cable modem display.
Related Commands
You can use the master indexes or search online to find documentation of 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 [profile] [iuc-code]
Syntax Description
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, initial maintenance, station maintenance, short grant, and long grant.
Sample Display
The following is sample output from the show cable modulation-profile command:
router# show cable modulation-profile 1Mo IUC Type Preamb Diff FEC FEC Scrambl Max Guard Last Scrambl Preamb length enco T CW seed B time CW offset bytes size size size short1 request qpsk 64 no 0x0 0x10 0x152 1 8 no yes 56 1 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 1 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 1 short qpsk 72 no 0x5 0x4B 0x152 0 8 no yes 48describes the fields shown in the show cable modulation-profile display.
.
Related Commands
You can use the master indexes or search online to find documentation of related commands.
show cable burst-profile
show cable modem
show cable privacy
show cable qos
show cable spectrum-groupshow cable qos permission
To display the status of permissions for changing QoS tables, use the show cable qos permission privileged EXEC configuration command.
cable qos permission
Syntax Description
This command has no keywords or arguments.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Sample Displays
The following example displays the output of the show cable qos permission command:
Router# show cable qos permissionCreate by SNMP Update by SNMP Create by modemsyes yes yesdescribes the fields shown in the show cable qos permission displays.
Related Commands
cable qos permission
cable qos profile
show qos profileshow cable qos profile
To display QoS profiles, use the show cable qos profile privileged EXEC configuration command.
show cable qos profile service class
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 NA.
Sample Displays
The following example displays the QoS tables for profiles 1, 2, 3, and 4:
Router# show cable qos profileService Prio Max Guarantee Max Max tx TOS TOS Create Bclass upstream upstream downstream burst mask value by privbandwidth bandwidth bandwidth enab1 0 0 0 0 0 0x0 0x0 cmts no2 0 64000 0 1000000 0 0x0 0x0 cmts no3 0 1000 0 1000 0 0x0 0x0 cmts no4 7 2000000 100000 4000000 0 0x0 0x0 cm yesdescribes the fields shown in the show cable qos profile displays.
Related Commands
cable qos permission
cable qos profile
show cable qos permissionshow cable spectrum-group
To display information about spectrum groups, use the show cable spectrum-group privileged EXEC configuration command.
show cable spectrum-group [groupnum]
Syntax Description
groupnum
(Optional) Display information about the specified group number. If no group number is specified, information for all spectrum groups is displayed.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Sample Displays
The following are sample outputs from the show cable spectrum-group command for the upstream spectrum group named sales:
Router# show cable spectrum-group salesSpectrum Frequency Band Upstream Time Time Input SharedGroup (MHz) Port Available Delete PowerLevel Topology4 5.000-40.000 5 N4 5.000 5 N4 5.000-40.000 Mon 12:00:00 Mon 12:00:00 5 N4 5.000 Mon 12:00:00 5 Ndescribes the fields shown in the show cable spectrum-group displays.
Related Commands
cable spectrum-group
show cable burst-profile
show cable modem
show cable modulation-profile
show cable privacy
show cable qosshow controllers cable upstream
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 [upstream] [port]
Syntax Description
slot/port
Slot number/port number indicating the location of the Cisco MC11 cable modem card.
upstream
(Optional) Displays upstream interface status.
port
(Optional) Selects specific upstream port.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release in release 11.3 XA and changed in this release.
Sample Display
The following is sample output from the show controllers cable upstream command for the modem located in slot 4, port 0:
Router# show controllers cable 4/0 upstream 2Cable4/0 Upstream 2 is administratively downFrequency 5.008 MHz, Channel Width 0.200 MHz, QPSK Symbol Rate 0.160 MspsSpectrum Group 4Nominal Input Power Level 5 dBmV, Tx Timing Offset 0Ranging Backoff Start 16, Ranging Backoff End 16, Tx Backoff Start 16Tx Backoff End 16, Modulation Profile Group 1part_id=0x3137, rev_id=0x01, rev2_id=0xFFnb_agc_thr=0x0000, nb_agc_nom=0x0000Range Load Reg Size=0x58Request Load Reg Size=0x0EMinislot Size in number of Timebase Ticks is = 8Minislot Size in Symbols =8Bandwidth Requests = 0x0Piggyback Requests = 0x0Invalid BW Requests= 0x0Minislots Requested= 0x0Minislots Granted = 0x0Minislot Size in Bytes = 2UCD Count = 0DES Ctrl Reg#0 = C00C0C43, Reg#1 = 0
describes the fields shown in the show controllers cable upstream display.
Related Commands
show controllers cable downstream
show interface cable
To display cable interface information, use the show interface cable privileged EXEC command:
show interface cable slot/port [downstream | upstream| ranging]
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Sample Display
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
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 errorsdescribes the fields shown in the show interface 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:1describes the fields shown in the show interface cable upstream display.
The following is sample output for the upstream cable interface located in slot 6/port 0 from the show interface cable ranging command:
router# show interface cable 6/0 rangingCMTS using fixed init ranging period : 500 msecsPeriodic ranging period/modem : 10000 (msecs)Periodic ranging-request timeout : 30 (msecs)Periodic ranging sids in station maintenance list : 11Periodic ranging sids in rng request pending list : 0describes the fields shown in the show interface cable upstream display.
Related Commands
You can use the master indexes or search online to find documentation of related commands.
show interface cable sid
show interface cable signal-qualityshow interface 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 uBR7200 chassis slot number and downstream port number. Valid values are from 3 to 6.
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. Data transport over the RF link uses the registered SID address rather than the Ethernet address. This allows multiple hosts to access the network via a single cable modem.
Sample Display
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
describes the fields shown in the output for the show interface cable sid displays.
Related Commands
You can use the master indexes or search online to find documentation of related commands.
show interface cable signal-quality
show 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
slot/port
Identifies the uBR7200 chassis slot number and downstream port number. Valid values are from 3 to 6.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 XA.
Sample Display
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
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
You can use the master indexes or search online to find documentation of related commands.
show interface
show interface cable downstream
show interface cable sidDebug Commands
The following debug cable commands have been added to or modified in this release of the Cisco uBR7246 and are available to help you troubleshoot the cable interfaces:
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•
•
•
•
The debug cable envm command is the same as the debug cable env command in previously documented in the Voice, Video, and Home Applications Configuration Guide. The debug cable error command is the same as the debug cable err command in Voice, Video, and Home Applications Configuration Guide.
For information on other debug cable commands, refer to Voice, Video, and Home Applications Configuration Guide.
debug cable mac
Use the debug cable mac EXEC command to display MAC-layer information for the specified cable modem. The no form of this command disables debugging output.
debug cable mac
Syntax Description
This command takes no keywords or arguments.
Default
None.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release in release 11.3 NA.
Note
Example
The following example shows the return for the MAC layer:
router# debug cable mac19:46:27: Ranging Modem with Sid 1 on i/f : Cable6/0/U019:46:27: Got a ranging request19:46:27: SID value is 1 on Interface Cable6/0/U019:46:27: CM mac address 00:E0:1E:B2:BB:0719:46:27: Timing offset is 019:46:27: Power value is FE0, or 0 dB19:46:27: Freq Error = 0, Freq offset is 019:46:27: Ranging has been successful for SID 1 on Interface Cable6/0/U019:46:29: Ranging Modem with Sid 2 on i/f : Cable6/0/U019:46:29: Got a ranging request19:46:29: SID value is 2 on Interface Cable6/0/U019:46:29: CM mac address 00:E0:1E:B2:BB:8F19:46:29: Timing offset is 119:46:29: Power value is 1350, or 0 dB19:46:29: Freq Error = 0, Freq offset is 019:46:29: Ranging has been successful for SID 2 on Interface Cable6/0/U019:46:32: Ranging Modem with Sid 3 on i/f : Cable6/0/U019:46:32: Got a ranging request19:46:32: SID value is 3 on Interface Cable6/0/U019:46:32: CM mac address 00:E0:1E:B2:BB:B119:46:32: Timing offset is FFFFFFFF19:46:32: Power value is 1890, or -1 dB19:46:32: Freq Error = 0, Freq offset is 019:46:32: Ranging has been successful for SID 3 on Interface Cable6/0/U019:46:34: Ranging Modem with Sid 5 on i/f : Cable6/0/U0Table 14
Sample Output for the debug cable mac Command
Related Commands
show controllers cable downstream
debug cable map
Use the debug cable map EXEC command to display map debugging messages. The no form of this command disables debugging output.
debug cable map
Syntax Description
This command takes no keywords or arguments.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release in release 11.3 NA.
Example
The following example displays all the MAP messages with and without data grants:
router# debug cable map19:41:53: On interface Cable6/0, sent 5000 MAPs, 1321 MAPs had grant(s)Long Grants 13256993, Total Short Grants 223A sample Map without any data grant------------------ MAP MSG --------------------us_ch_id: 1 ucd_count: 5 num_elems: 9 reserved: 0Alloc Start Time: 33792 Ack Time: 33618Rng_bkoff_start: 0 Rng_bkoff_end: 2Data_bkoff_start: 1 Data_bkoff_end: 3:sid:16383 iuc:1 mslot_offset:0sid:0 iuc:7 mslot_offset:40A sample Map with data grant(s)------------------ MAP MSG ---------------------us_ch_id: 1 ucd_count: 5 num_elems: 7 reserved: 0Alloc Start Time: 33712 Ack Time: 33578Rng_bkoff_start: 0 Rng_bkoff_end: 2Data_bkoff_start: 1 Data_bkoff_end: 3sid:2 iuc:6 mslot_offset:0sid:16383 iuc:1 mslot_offset:16sid:0 iuc:7 mslot_offset:40Table 15
Debug Cable MAP Field Descriptions
Related Commands
show controllers cable downstream
debug cable Rx
Use the debug cable Rx EXEC command to display incoming transmissions. The no form of this command disables debugging output.
debug cable Rx
Syntax Description
This command takes no arguments.
Command Mode
Privileged EXEC.
Usage Guidelines
This command first appeared in Cisco IOS Release in release 11.3 NA.
Related Commands
show controllers cable downstream
What to Do Next
For more information on the Cisco uBR7246, refer to the Voice, Video, and Home Applications Configuration Guide.
For instructions on the advanced configuration of the port adapters installed in your Cisco uBR7246, refer to the respective installation documents that shipped with each port adapter. This documentation is also available on the Cisco Documentation CD-ROM and on CCO.
For instructions on the advanced configuration of the cable modem cards, refer to the document Cisco uBR7246 Universal Broadband Router Cable Modem Card Installation and Configuration This document accompanies every Cisco cable modem card that is shipped from the factory as an installed item in a Cisco uBR7246 or as a FRU. The document is also available on the Cisco Documentation CD-ROM and on CCO.
Guest
