Cisco IOS CMTS Cable Software Configuration Guide, Release 12.2SC - CM Steering on the Cisco CMTS Routers [Cisco uBR10000 Series Universal Broadband Routers]

Table Of Contents

CM Steering on the Cisco CMTS Routers

Finding Feature Information

Contents

Prerequisites for CM Steering

Restrictions for CM Steering

Information About CM Steering

Channel Redirection

Channel Restriction

How to Configure CM Steering on Cisco CMTS Routers

Configuring a Channel Redirection

Restrictions

Verifying a Channel Redirection

Clearing a Channel Redirection

Configuring a Channel Restriction

Prerequisites

Restrictions

Verifying a Channel Restriction

Clearing Attribute Masks

Debugging Channel Redirection

Troubleshooting Tips

Configuration Examples for CM Steering

Configuring Channel Redirection: Example

Configuring Channel Restriction: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Feature Information for CM Steering

CM Steering on the Cisco CMTS Routers

Revised: November 16, 2009

First Published: December 18, 2008

The cable modem (CM) steering feature helps to redirect or steer CMs to multiple Cable Modem Termination Systems (CMTS) using downstream frequency overrides. A configurable string is used to bond the CM to the proper CMTS. Once the bonding is done, the CMTS can move the CM within itself for load balancing.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for CM Steering" section.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS, Catalyst OS, and Cisco IOS XE software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Contents

•Prerequisites for CM Steering

•Restrictions for CM Steering

•Information About CM Steering

•How to Configure CM Steering on Cisco CMTS Routers

•Configuration Examples for CM Steering

•Additional References

•Feature Information for CM Steering

Prerequisites for CM Steering

DOCSIS 3.0-defined Type-Length-Values (TLVs) are required to aid channel selection. All TLVs encoded as general extension information in CM configuration files are backward compatible with DOCSIS 1.1 and DOCSIS 2.0 CMs.

Table 1 shows the Cisco Cable Modem Termination System (CMTS) hardware compatibility prerequisites for this feature.

Table 1

CMTS Platform

Processor Engine

Cable Interface Cards

Cisco uBR10012 Universal Broadband Router

Cisco IOS Release 12.2(33)SCB and later

•PRE2

•PRE4

Cisco IOS Release 12.2(33)SCB and later

•Cisco uBR10-MC5X20S/U/H

•Cisco UBR-MC20X20V

Cisco uBR7200 Series Universal Broadband Routers

Cisco IOS Release 12.2(33)SCB and later

•Cisco uBR7246VXR Universal Broadband Router only

•NPE-G1

•NPE-G2

Cisco IOS Release 12.2(33)SCB and later

•Cisco uBR-MC28U/X

•Cisco uBR-MC16U/X

Cisco uBR7225VXR Universal Broadband Router

Cisco IOS Release 12.2(33)SCB and later

•NPE-G1

•NPE-G2

Cisco IOS Release 12.2(33)SCB and later

•Cisco uBR-E-28U

•Cisco uBR-E-16U

•Cisco uBR-MC28U/X

•Cisco uBR-MC16U/X

CM Steering Hardware Compatibility Matrix

Restrictions for CM Steering

The CM steering feature has the following general restrictions:

•To restrict the CM on the exact downstream on the target CMTS, the redirection must be configured on the target CMTS.

•You must manually execute the clear cable modem service-type command to clear the CM service type identifier stored at the CMTS during registration.

•You must manually execute the clear cable modem attribute-masks command to clear the CM attribute masks stored at the CMTS during registration. These attribute masks are used to restrict usage of upstream channels during ranging time.

•CM steering supports only upstream masks.

•Channel steering does not take place when the CM fails in initial ranging.

•The CM will take more time to come online when channel steering is deployed. The time taken is proportional to the number of modems, and the downstreams and upstreams that the CM can reach.

•A modem cannot be load balanced to any upstream channel with attributes that conflict with attribute masks of the modem.

•The keep alive detection feature may trigger an line card (LC) switchover. For more details on the Keep Alive feature, refer to the N+1 Redundancy for the Cisco Cable Modem Termination System chapter of the Cisco Cable Modem Termination System Feature Guide.

•Each interface should have an active modem or use no keepalive on this interface.

Information About CM Steering

CM steering allows you to redirect or steer the CMs to one or more CMTS using downstream frequency overrides. Once a CM registers on a downstream on the proper CMTS, the CMTS can move the CM to any location for load balancing.

The DOCSIS 3.0-compliant Service Type Identifier used as the configurable string in the CM configuration file is backward-compatible with DOCSIS 1.1 and DOCSIS 2.0 CMs.

The CMTS can also impose restrictions on the number of channels a CM can use. DOCSIS 3.0 defines several TLVs to aid the channel selection.

The following TLVs are used in CM steering:

•TLV 43.9 (Cable Modem Attribute Masks) limits the set of channels the CMTS can assign to the CM by allowing or forbidding certain binary attributes. The CM Attribute Masks have four sub-TLVs and CM steering makes use of two sub-TLVs, which are listed below:

–TLV 43.9.3—Cable Modem Upstream Required Attribute Mask (C.1.1.18.1.8.3 of CM-SP-MULPIv3.0-I07-080215). It is a 32-bit mask representing the set of binary upstream channel attributes required for the CM.

–TLV 43.9.4—Cable Modem Upstream Forbidden Attribute Mask (C.1.1.18.1.8.4 of CM-SP-MULPIv3.0-I07-080215). It is a 32-bit mask representing the set of binary upstream channel attributes forbidden for the CM.

•TLV 43.11 is used for a redirection action based on the service type identifier field. The CM sends the TLV 43.11 in the REG-REQ MAC message. The DOCSIS 1.1 and DOCSIS 2.0 modems will also send this file ID when doing the registration.

•TLV43.1, defined as Policy ID in DOCSIS 2.0 and DOCSIS 3.0, is parsed and stored in the CM during registration. Before moving the CM during load balancing (LB), the CMTS checks whether the CM has a preconfigured policy with the same Policy ID. If the policy does exist, the CMTS disables LB for this CM and moves to the next CM. If the policy does not exist on the CMTS, or the Policy ID is missing from the CM configuration file, LB prohibition is not performed.

The following TLVs are supported in CM Steering:

•TLV 43.11 (Service type identifier) from section C.1.1.18.1.10 in CM-SP-MULPIv3.0-I07-080215.

•CM attribute masks (TLV 43.9) from C.1.1.18.1.8.3 and C.1.1.18.1.8.4 of CM-SP-MULPIv3.0-I07-080215.

•TLV portion (43.1, Policy ID) of REQ-REQ

CM steering contains three small featurettes: Channel Redirection, Channel Restriction, and Load Balancing. The Load Balancing feature is covered in the Configuring Load Balancing and Dynamic Channel Change (DCC) on the Cisco CMTS document.

Channel Redirection

The service type identifier-based channel redirection allows you to redirect or steer the CMs to one or more CMTS using downstream frequency overrides. A configurable string in the CM configuration file is used to bond the CM to the correct CMTS. A global CLI ties the string to the downstream frequency, which is configured on the CMTS.

Once a CM registers on a downstream of a CMTS, the CMTS can move the CM to any location within the CMTS for load balancing.

A DOCSIS 3.0-compliant TLV (TLV 43.11) service identifier is used as the configurable string in the CM configuration file. It is backward-compatible with DOCSIS 1.1 and DOCSIS 2.0 CMs. This TLV is used as the tag of the CM to decide whether to redirect or not. The method used to redirect is downstream frequency override in the ranging phase.

Channel Restriction

The CMTS can impose restrictions on the channels a CM uses based on the CMs configuration file or its capabilities. For example, Advanced Time Division Multiple Access (ATDMA) capable CMs should not use Time Division Multiple Access (TDMA) upstream channels.

DOCSIS 3.0 provides guidelines on how a CMTS can choose a pair of channels for a CM at both registration time and during autonomous load balancing. DOCSIS 3.0 defines several TLVs to aid channel selection, including the service type identifier, load balancing group ID, and CM attribute masks and service flow attribute masks.

Except for the service flow attribute masks, the TLVs are encoded as general extension information in the CM configuration file, which are backward compatible with DOCSIS 1.1 and DOCSIS 2.0 CMs.

Channel restriction looks only for upstream CM attribute masks, and is therefore compatible with DOCSIS 1.1, DOCSIS 2.0 and DOCSIS 3.0 CMs in non-Multiple Transmit Channel (MTC) mode.

Note In Cisco IOS Release 12.2(33)SCC and later releases, it is recommended to assign a CM to different Restricted Load Balancing Groups (RLBGs) to restrict the usage of channels, instead of using attribute masks.

How to Configure CM Steering on Cisco CMTS Routers

This section describes the following required and optional procedures:

•Configuring a Channel Redirection (required)

•Verifying a Channel Redirection (optional)

•Clearing a Channel Redirection (optional)

•Configuring a Channel Restriction (required)

•Verifying a Channel Restriction (optional)

Configuring a Channel Redirection

To configure a channel redirection that allows you to redirect or steer the CMs to one or more CMTS using the downstream frequency override in the ranging phase, use the cable service type ds-frequency command.

Restrictions

You can redirect CMs matching the service type identifier to a downstream frequency. However, one service type identifier cannot be redirected to multiple downstream frequencies.

During registration, the CM service type identifier is stored in the CMTS to redirect target downstream frequency during ranging time. If you want to clear the stored service type identifier, you must manually execute the clear cable modem service-type command.

To restrict the CM on the exact downstream on the target CMTS, the redirection must be configured on the target CMTS. If the CMs are redirected to the source CMTS, the dynamic load balance may not work properly and the CM may drop offline during load balancing. For the CMs to be redirected it must reach the target frequency.

SUMMARY STEPS

1. enable

2. configure terminal

3. cable service type [service-type-id] ds-frequency [frequency]

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

cable service type [service-type-id] ds-frequency [frequency]
Example:

Router(config)# cable service type commercial ds-frequency 519000000

Redirects matching service types to downstream frequency.

service-type-id—Specifies the service type identifier to be redirected. Maximum length is 16.

frequency—Specifies the downstream frequency to which the CMs are redirected.

Verifying a Channel Redirection

To verify configuration of channel redirection, use the show cable modem verbose command as shown in the following example:

Router# show cable modem verbose
MAC Address                         : 0014.bfbe.81e3
IP Address                          : 30.0.52.15 
IPv6 Address                        : --- 
Dual IP                             : N
Prim Sid                            : 15
Host Interface                      : C1/0/U0
MD-DS-SG                            : N/A
Wideband Capable                    : Y
RCP Index                           : 0
sysDescr                            : 
Upstream Power                      : 0.00 dBmV (SNR = 36.12 dB)
Downstream Power                    : 0.00 dBmV (SNR = ----- dB)
Timing Offset                       : 1874  
Initial Timing Offset               : 1874
Curr US Timing Adjust               : 0
Prev US Timing Adjust               : 0
Received Power                      :  0.00 dBmV
MAC Version                         : DOC2.0
QoS Provisioned Mode                : DOC1.1
Enable DOCSIS2.0 Mode               : Y
Phy Operating Mode                  : tdma
Modem Status                        : {Modem=online(pt), Security=assign(tek)}
Capabilities                        : {Frag=Y, Concat=Y, PHS=Y}
Security Capabilities               : {Priv=BPI+, EAE=N}
L2VPN Capabilities                  : {L2VPN=N, eSAFE=N}
Sid/Said Limit                      : {Max US Sids=16, Max DS Saids=15}
Optional Filtering Support          : {802.1P=N, 802.1Q=N, DUT=N}
Transmit Equalizer Support          : {Taps/Symbol= 1, Num of Taps= 24}
Number of CPE IPs                   : 0(Max CPE IPs = 16)
CFG Max-CPE                         : 10
Flaps                               : 0()
Errors                              : 0 CRCs, 0 HCSes
Stn Mtn Failures                    : 0 aborts, 0 exhausted
Total US Flows                      : 1(1 active)
Total DS Flows                      : 1(1 active)
Total US Data                       : 1 packets, 401 bytes
Total US Throughput                 : 0 bits/sec, 0 packets/sec
Total DS Data                       : 0 packets, 0 bytes
Total DS Throughput                 : 0 bits/sec, 0 packets/sec
LB group index                      : 0x0
LB reg_group_id                     : 0x0
LB policy id                        : 0
LB reg_policy_id                    : 0
LB priority                         : 0
Required DS Attribute Mask          : 0x0
Forbidden DS Attribute Mask         : 0x0
Required US Attribute Mask          : 0x0
Forbidden US Attribute Mask         : 0x0
Service Type ID                     : commercial
Active Classifiers                  : 0 (Max = NO LIMIT) 
DSA/DSX messages                    : permit all
Number of Multicast DSIDs Support   : 15
MDF Capability Mode                 : 0
FCType10 Forwarding Support         : N
Features Bitmask                    : 0x0
Total Time Online                   : 00:59   
To view the modems having the service type identifier, use the show cable modem service-type-id command as shown in the following example:

Router# show cable modem service-type-id
                                                                             B D
MAC Address    IP Address      I/F       MAC         Prim Service-type-id    P I
                                         State       Sid                     I P
0018.6812.29ae 41.42.2.212    C6/1/4/U2 offline      3838 commercial         N N
0018.6811.f9f8 41.42.0.140    C6/1/4/U2 offline      3225 commercial         N N
0018.6811.fba6 41.42.5.169    C6/1/4/U2 offline      3439 commercial         N N
0018.6812.225a 41.42.3.210    C6/1/4/U2 offline      3355 commercial         N N
0018.6811.fa8c 41.42.1.133    C6/1/4/U2 offline      3091 commercial         N N
0018.6812.37e8 41.42.0.136    C6/1/4/U2 offline      7439 commercial         N N
0018.6811.fbca 41.42.2.255    C6/1/4/U2 offline      6263 commercial         N N
0018.6811.fb44 41.42.2.17     C6/1/4/U2 offline      2996 commercial         N N
0018.6812.2f20 41.42.0.100    C6/1/4/U2 offline      3544 commercial         N N
Clearing a Channel Redirection

To clear the cable modem attributes, use the clear cable modem command as shown in the following examples:

Router# clear cable modem all

Router# clear cable modem oui string

Router# clear cable modem cable slot/subslot/port offline

To clear the cable modem service type identifiers, use the clear cable modem service-type command as shown in the following examples:

Router# clear cable modem all service-type-id

Router# clear cable modem oui string service-type-id

Router# clear cable modem slot/subslot/port offline service-type-id

Configuring a Channel Restriction

To impose restrictions on the channels a CM can use based on its configuration file or capabilities, use the cable upstream attribute-mask command.

Prerequisites

Advanced Time Division Multiple Access (ATDMA) capable cable modems should be restricted from using Time Division Multiple Access (TDMA) upstream channels.

Restrictions

•The CM attribute masks (TLV 43.9) are a function of the CMTS support and are compatible only with legacy DOCSIS 1.1 and DOCSIS 2.0 CMs.

•When the CMTS cannot find an appropriate US channel in the same legacy LB group, the CM steering checking is skipped and CMs come online. The US channel must meet the requirement of CM US attribute masks if a load balancing group (LBG) is not configured.

•During registration, the CM attribute masks are stored at the CMTS. These are then used to restrict usage of upstream channels during ranging time. You must manually execute the clear cable modem attribute-masks command to clear the stored attribute masks.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface cable slot/subslot/port

4. cable upstream [upstream-interface] attribute-mask [attribute-mask]

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

interface cable slot/subslot/port
Example:

Router# configure terminal

Enables the cable interface.

Step 4

cable upstream upstream-interface attribute-mask attribute-mask
Example:

Router(config-if)# cable upstream 0 attribute-mask ffff]

Configures the attribute mask on a particular upstream interface.

•upstream-interface—Specifies the upstream port.

•attribute-mask—Specifies the attribute mask bitmap in hexadecimal format.
Example: 0-FFFFFFFF

Note From Cisco IOS Release 12.2(33)SCC, the bit 0 in attribute-mask is bypassed when CM steering checks it.

Verifying a Channel Restriction

To verify the service type identifier and CM attribute masks configured for a CM, use the show cable modem verbose command as shown in the following example:

Router# show cable modem 0019.474d.e291 verbose
MAC Address                         : 0019.474d.e291
IP Address                          : 40.3.100.16    
IPv6 Address                        : ---                                    
Dual IP                             : N
Prim Sid                            : 35
Host Interface                      : C5/0/4/U0
MD-DS-SG                            : 1
MD-CM-SG                            : 0x40100
Primary Downstream                  : Mo1/0/0:0 (RfId : 0)
Wideband Capable                    : N
RCP Index                           : 0
sysDescr                            : 
Upstream Power                      : 0.00 dBmV (SNR = 36.12 dB)
Downstream Power                    : 0.00 dBmV (SNR = ----- dB)
Timing Offset                       : 1573  
Initial Timing Offset               : 1573
Curr US Timing Adjust               : 0
Prev US Timing Adjust               : 0
Received Power                      :  -0.50 dBmV
MAC Version                         : DOC2.0
QoS Provisioned Mode                : DOC1.1
Enable DOCSIS2.0 Mode               : Y
Phy Operating Mode                  : tdma
Modem Status                        : {Modem=online, Security=disabled}
Capabilities                        : {Frag=Y, Concat=Y, PHS=Y}
Security Capabilities               : {Priv=, EAE=N}
L2VPN Capabilities                  : {L2VPN=N, eSAFE=N}
Sid/Said Limit                      : {Max US Sids=16, Max DS Saids=15}
Optional Filtering Support          : {802.1P=N, 802.1Q=N, DUT=N}
Transmit Equalizer Support          : {Taps/Symbol= 1, Num of Taps= 24}
Number of CPE IPs                   : 0(Max CPE IPs = 16)
CFG Max-CPE                         : 16
Flaps                               : 0()
Errors                              : 0 CRCs, 0 HCSes
Stn Mtn Failures                    : 0 aborts, 0 exhausted
Total US Flows                      : 1(1 active)
Total DS Flows                      : 1(1 active)
Total US Data                       : 7 packets, 619 bytes
Total US Throughput                 : 0 bits/sec, 0 packets/sec
Total DS Data                       : 2 packets, 148 bytes
Total DS Throughput                 : 4 bits/sec, 0 packets/sec
LB group index                      : 0x0
LB reg_group_id                     : 0x0
LB policy id                        : 2
LB reg_policy_id                    : 2
LB priority                         : 0
Required DS Attribute Mask          : 0x0
Forbidden DS Attribute Mask         : 0x0
Required US Attribute Mask          : 0x1111
Forbidden US Attribute Mask         : 0x0
Service Type ID                     : commercial
Active Classifiers                  : 0 (Max = NO LIMIT) 
DSA/DSX messages                    : permit all
Voice Enabled                       : NO
DS Change Times                     : 0
Boolean Services                    : 0
Number of Multicast DSIDs Support   : 0
MDF Capability Mode                 : 0
FCType10 Forwarding Support         : N
Features Bitmask                    : 0x0
Total Time Online                   : 00:19 
Clearing Attribute Masks

If the CM fails to come online after configuring attribute masks in the CM configuration file, you can use the following procedure to verify the contents of the CM configuration file and clear its contents if the attribute masks are configured differently.

SUMMARY STEPS

1. enable

2. show cable modem verbose

3. clear cable modem attribute-masks

4. show running-config

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

show cable modem verbose
Example:

Router# cable modem verbose

Verifies whether the CM attribute masks have been configured in the CM configuration file.

Note If the CM configuration file shows any change, use the clear cable modem attribute-masks command.

Step 3

clear cable modem attribute-masks
Example:

Router# clear cable modem all attribute-masks

Clears the CM attribute masks stored in CMTS.

Step 4

show running-config
Example:

Router# show running-config

Displays the running configuration.

Use it to verify whether upstream masks of the CM are configured on the corresponding upstream channel.

Debugging Channel Redirection

Use the following steps to debug channel redirection:

SUMMARY STEPS

1. enable

2. show running config

3. debug cable range

4. debug cable registration

5. debug cable mac-address [mac] verbose

6. clear cable modem [mac] delete

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

show running config
Example:

Router# show running config

Displays the running configuration.

Note You can use this information to verify the CMTS configuration to make sure that the CMs can reach the configured downstream-frequency.

Step 3

debug cable range
Example:

Router# debug cable range

Displays ranging messages from CMs on the Hybrid Fiber-Coaxial (HFC) network.

Step 4

debug cable registration
Example:

Router# debug cable registration

Displays debug messages for the CM registration process.

Step 5

debug cable mac-address [mac] verbose
Example:

Router# debug cable mac-address 00E0.1E00.0000 ffff.ff00.0000 verbose

Displays debug information for a specific CM.

Step 6

clear cable modem [mac] delete
Example:

Router# clear cable modem 00E0.1E00.0000 ffff.ff00.0000 delete

Removes the specified modem from the CMTS.

Note This allows the CMTS to re-register the CM's page.

Troubleshooting Tips

This section provides tips and commands you can use to troubleshoot your CM Steering configuration.

•Clearing Attribute Masks

•Debugging Channel Redirection

•Because empty rules are not allowed, if you remove the last rule of a policy, using no cable load-balance docsis-policy policy-id rule rule-id or no cable load-balance rule rule-id, the policy itself will be removed.

•Use the show running | include docsis-policy command or the show running-config | include rule command to see the policy and rule configured in the system.

Configuration Examples for CM Steering

This section provides the following configuration examples:

•Configuring Channel Redirection: Example

•Configuring Channel Restriction: Example

Configuring Channel Redirection: Example

In the following example, CMs matching a particular service type identifier are redirected to a particular downstream frequency.
Router(config)# cable service type commercial ds-frequency 519000000
Configuring Channel Restriction: Example

The following example sets an upstream's attribute mask in hexadecimal format for channel restriction.
Router# configure terminal
Router(config)# interface Cable 5/0/4
Router(config-if)# cable upstream 0 attribute-mask ffff
Router(config-if)# end
To verify the channel restriction configuration, use the following command:
Router# show cable modem service-type-id
                                                                             B D
MAC Address    IP Address      I/F       MAC         Prim Service-type-id    P I
                                         State       Sid                     I P
0018.6812.29ae 41.42.2.212    C6/1/4/U2 offline      3838 commercial         N N
0018.6811.f9f8 41.42.0.140    C6/1/4/U2 offline      3225 commercial         N N
0018.6811.fba6 41.42.5.169    C6/1/4/U2 offline      3439 commercial         N N
0018.6812.225a 41.42.3.210    C6/1/4/U2 offline      3355 commercial         N N
0018.6811.fa8c 41.42.1.133    C6/1/4/U2 offline      3091 commercial         N N
0018.6812.37e8 41.42.0.136    C6/1/4/U2 offline      7439 commercial         N N
0018.6811.fbca 41.42.2.255    C6/1/4/U2 offline      6263 commercial         N N
0018.6811.fb44 41.42.2.17     C6/1/4/U2 offline      2996 commercial         N N
0018.6812.2f20 41.42.0.100    C6/1/4/U2 offline      3544 commercial         N N
Additional References

The following sections provide references related to the CM Steering feature.

Related Documents

Related Topic

Document Title

CMTS cable commands

Cisco IOS CMTS Cable Command Reference

DOCSIS 1.1 as it relates to Cisco CMTS

Cisco IOS CMTS Cable Software Configuration Guide

Load Balancing and Dynamic Channel Change (DCC)

Load Balancing and Dynamic Channel Change on the Cisco CMTS Routers

N+1 Redundancy

N+1 Redundancy for the Cisco Cable Modem Termination System

Standards

Standard

Title

CM-SP-MULPIv3.0-I07-080215

DOCSIS 3.0 MAC and Upper Layer Protocols Interface Specification

CM-SP-MULPIv3.0-I08-080522

DOCSIS 3.0 MAC and Upper Layer Protocols Interface Specification

CM-SP-RFI2.0-I13-080215

DOCSIS 2.0 Radio Frequency Interface Specification

MIBs

MIB

MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

RFCs

RFC

Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

Technical Assistance

Description

Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/support

Feature Information for CM Steering

Table 2 lists the features in this module and provides links to specific configuration information. Only features that were introduced or modified in Cisco IOS Release 12.2(33)SCB or a later release appear in the table.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Note Table 2 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release. Unless noted otherwise, subsequent releases of that Cisco IOS software release also support that feature.

Table 2 Feature Information for CM Steering on the Cisco CMTS Routers

Feature Name

Releases

Feature Information

Channel Redirection

12.2(33)SCB

Channel redirection allows you to redirect or steer the CMs to one or more CMTS using downstream overrides.

The following sections provide information about this feature:

•Channel Redirection

•Configuring a Channel Redirection

•Verifying a Channel Redirection

The following commands were introduced or modified: cable service type, cable service type ds-frequency, clear cable modem attribute-masks, clear cable modem service-type, show cable modem service-type-id.

Channel Restriction

12.2(33)SCB

The CMTS can impose restrictions on the channels a CM can use based on the CM configuration file or its capabilities.

The following sections provide information about this feature:

•Channel Restriction

•Configuring a Channel Restriction

•Verifying a Channel Restriction

The following command is introduced: cable upstream attribute-mask.

Channel Restriction

12.2(33)SCB4

When the CMTS cannot find an appropriate US channel in the same legacy LB group, the CM steering checking is skipped and CMs come online.

The following sections provide information about this feature:

•Configuring a Channel Restriction

RLBG/GLBG Support and NB DBS Interact with DLB Support

12.2(33)SCC

The following sections have been updated with information about this feature:

•Channel Restriction

•Configuring a Channel Restriction

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