The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
This release notes contain information about downloading and installing Cisco IOS Release 12.2(33)SCF. It also provides new and changed information, hardware support, limitations and restrictions, and caveats for Cisco IOS Release 12.2(33)SCF.
For software caveats that apply to the Cisco IOS Release 12.2(33)SCF on the Cisco uBR7200 series routers, see the corresponding release notes for Cisco uBR7200 Series Routers.
We recommend that you view the field notices for this release to see if your software or hardware platforms are affected. If you have an account on Cisco.com, you can find field notices at http://www.cisco.com/en/US/customer/support/tsd_products_field_notice_summary.html .
If you do not have a Cisco.com login account, you can find field notices at http://www.cisco.com/en/US/support/tsd_products_field_notice_summary.html .
NoteCisco IOS Release 12.2(33)SCF is generally available for field deployment. However, we recommend that you validate and qualify Cisco IOS Release 12.2(33)SCF in a limited field trial with your specific network configuration requirements in order to ensure a smoother, faster, and successful field deployment.
These sections describe the system requirements for Cisco IOS Release 12.2(33)SCF:
This section describes the memory requirements for Cisco IOS Release 12.2(33)SCF.
NoteEffective with Cisco IOS Release 12.2(33)SCC, the image size is greater than 65 MB and requires TFTP servers capable of downloading large images.
Table 1-1 displays the memory recommendations for the Cisco uBR10012 universal broadband router with Cisco IOS Release 12.2(33)SCF feature sets.
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Flash Memory |
DRAM Memory 1 |
From |
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DOCSIS Base 3 DES image and Lawful Intercept for Cisco PRE22 |
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1.DRAM memory is not configurable on the Cisco uBR10012 router. |
The following sections list the hardware supported on various Cisco IOS Releases:
Table 1-2 provides information about the cable interface line cards supported in Cisco IOS Release 12.2(33)SCF.
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The Cisco uBR10012 series universal broadband routers support online insertion and removal (OIR) of cable interface line cards only when exchanging cable interface line cards of the same type.
Effective with Cisco IOS Release 12.2(33)SCC, OIR compatibility between the Cisco uBR10-MC5X20 and the Cisco UBR-MC20X20V line cards is supported. The OIR compatibility procedure translates the configuration from one format to another during the OIR process.
Prerequisites for Performing OIR
Restrictions During OIR Process
NoteThe Cisco uBR-MC3GX60V line card does not support OIR compatibility. To upgrade to the Cisco uBR-MC3GX60V line card from the Cisco uBR10-MC5X20H or Cisco UBR-MC20X20V line cards, you must remove the existing configuration of the line card using theno card command and create a new configuration for the Cisco uBR-MC3GX60V line card.
Step 1 In global configuration mode, enter the cr10k card oir-compatibility command for the cable interface line card to perform an OIR, as shown in the following example:
This command helps preserve the configuration and performs some internal synchronization to make sure that the OIR runs successfully.
Note Effective with Cisco IOS Release 12.2(33)SCC, OIR compatibility is automatically ON for all slots of the line cards.
Step 2 Save the configuration to ensure the transition, as shown in the following example:
Step 3 Turn the power off to the line card using the cable power off command for the slot that is being replaced, as shown in the following example:
This powers off the line card gracefully.
Step 4 Before removing the card, verify that the proper grounding instructions have been followed for the card.
For more information about preventing electrostatic discharge (ESD) damage, see:
http://www.cisco.com/warp/public/109/cable-linecard-handling.pdf
Step 6 Replace it with the new line card in the slot.
Step 7 Enter the cable power on command to power up the line card, as shown in the following example:
Step 8 Enter the show interface cable command and verify that the card and line protocol is “up” as shown in the following example:
Step 9 Enter the show controllers cable command and verify the hardware status, as shown in the following example:
Note To verify the hardware status of the Cisco UBRMC20X20V cable line cards, it is recommended that you run the show controller integrated-cable 8/0/0 brief command instead of the show controllers cable command.
Step 10 Verify the configuration with the show running-configuration command.
The Cisco uBR10012 universal broadband router supports up to four network line cards with any combination of the following cards:
NoteCisco HHGE line card is supported only with PRE2.
Table 1-3 provides information about other hardware supported in Cisco IOS Release 12.2SCF.
To determine the version of the Cisco IOS software running on your Cisco universal broadband router, log in to the router and enter the show version EXEC command:
For information about selecting a new Cisco IOS software release, see "How to Choose a Cisco IOS Software Release" at the following location:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1834/
products_tech_note09186a00800fb9d9.shtml
For information about upgrading the Cisco universal broadband routers, see the Software Installation and Upgrade Procedures document at the following location:
http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080094c07.shtml
For Cisco IOS upgrade ordering instructions, see:
http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/957_pp.htm
To choose a new Cisco IOS software release based on information about defects that affect that software, use Bug Search Tool (BST) at the following URL:
This section describes microcode software that is supported for the Cisco uBR10012 router.
The field-programmable device (FPD) image packages are used to update the shared port adapter (SPA) FPD images. If a discrepancy exists between a SPA FPD image and the Cisco IOS image that is running on the router, the SPA is deactivated until this discrepancy is resolved.
NoteThe maximum time to upgrade the FPD image on one SPA is 2 minutes. The total FPD upgrade time depends on the number of SPAs.
NoteThe FPD image package that is used to upgrade SPAs on a router that runs Cisco IOS Release 12.2(33)SCF is the ubr10k-fpd-pkg.122-33.SCF pkg file.
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A cold start of the router is required for an upgrade to a PRE4 from a PRE2 on a Cisco uBR10012 universal broadband router from a different release train, such as Cisco IOS Release 12.3(23)BC or other BC releases.
For more information, see Cisco uBR10012 Universal Broadband Router Performance Routing Engine Module at:
http://www.cisco.com/en/US/docs/interfaces_modules/cable/performance_routing_engine/installation/guide/pre5096.html
For more information, see the Cisco uBR10012 Router Release Notes for Cisco IOS Release 12.2(33)SCA at the following URL:
http://www.cisco.com/en/US/products/hw/cable/ps2209/prod_release_notes_list.html
Cisco IOS software is packaged in feature sets that consist of software images that support specific platforms. The feature sets available for a specific platform depend on which Cisco IOS software images are included in a release. Each feature set contains a specific set of Cisco IOS features.
Table 1-5 provides information about the important user guides in Cisco IOS Release 12.2SC.
Table 1-5 Important Guides in Cisco IOS Release 12.2SC
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Describes a set of Cisco CMTS documents and contains links to the referenced documents. Go to the following link to access this document: http://www.cisco.com/c/en/us/td/docs/cable/cmts/ubr10012/roadmap/u10krdmp.html |
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Provides information about the software commands used to configure a Cisco CMTS. Includes command syntax, default value, value range, command mode, usage guidelines, and examples. Go to the following link to access this document: http://www.cisco.com/c/en/us/td/docs/cable/cmts/cmd_ref/b_cmts_cable_cmd_ref.html |
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Describes how to plan, install, and configure a Cisco CMTS. Contains information about the supported technologies, interfaces and protocols and can also contain special installation considerations, network diagrams, example applications, system design, and environmental recommendations. Go to the following link to access this document set: http://www.cisco.com/c/en/us/support/video/ubr10000-series-universal-broadband-routers/products-implementation-design-guides-list.html |
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Provides step-by-step instructions for installing or upgrading a Cisco CMTS. Also includes line card installation guides, shipping documents, safety information, and quick-start guides for experienced users. Go to the following link to access this document set: http://www.cisco.com/c/en/us/support/video/ubr10000-series-universal-broadband-routers/products-installation-guides-list.html |
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Contains detailed, step-by-step instructions for configuring a Cisco CMTS, including software feature guides, configuration examples, network diagrams, and technical concepts. Go to the following link to access this document set: http://www.cisco.com/en/US/products/hw/cable/ps2209/ |
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Lists error and system messages for a Cisco CMTS, including any recommended user action for each message. Go to the following link to access this document: http://www.cisco.com/en/US/docs/cable/cmts/system/message/uberrmes.html |
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Provides problem-solving techniques for a Cisco CMTS, including methods to identify problems based on symptoms and recommended actions for resolution. Go to the following link to access this document set: http://www.cisco.com/en/US/products/hw/cable/ps2209/ |
The Cisco Feature Navigator is a web-based tool that enables you to determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image. You can search by feature or by feature set (software image). Under the release section, you can compare Cisco IOS software releases side-by-side to display both the features unique to each software release and the features that the releases have in common.
To access the Cisco Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check verifies that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password is e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:
https://tools.cisco.com/RPF/register/register.do
The Cisco Feature Navigator is updated regularly when major Cisco IOS software releases and technology releases occur. For the most current information, go to the Cisco Feature Navigator home page at the following URL:
For frequently asked questions about the Cisco Feature Navigator, see the FAQs at the following URL:
To identify the software images (feature sets) in Cisco IOS Release 12.2(33)SC that support a specific feature:
Step 1 Go to the Cisco Feature Navigator home page. Enter your Cisco.com login.
Step 2 Click Search by Feature .
Step 3 To find a feature, use either Filter by full or partial feature name or search for available features in alphabetical order. Either a list of features that match the search criteria or a list of features that begin with the number or letter selected from the ordered list is displayed in the text box.
Step 4 Select a feature from the Available Features pane, and click Add to add a feature to the Selected Features pane.
Note To learn more about a feature in the list, click Show Descriptions.
Repeat this step to add additional features. A maximum of 20 features can be chosen for a single search.
Step 5 Click Continue when you are finished selecting features.
Step 6 From the Major Release drop-down menu, choose 12.2SC .
Step 7 From the Release drop-down menu, choose the appropriate maintenance release.
Step 8 From the Platform Family drop-down menu, select the appropriate hardware platform. The Search Results table lists all the software images (feature sets) that support the selected feature.
To determine the features supported in a specific software image (feature set) in Cisco IOS Release 12.2(33)SC:
Step 1 Go to the Cisco Feature Navigator home page. Enter your Cisco.com login.
Step 3 From the Software drop-down menu in the Select First Image Parameters pane, choose IOS .
Step 4 From the Major Release drop-down menu, choose 12.2SC .
Step 5 From the Release Number drop-down menu, choose the appropriate maintenance release.
Step 6 From the Platform Family drop-down menu, choose the appropriate hardware platform.
Step 7 From the Feature Set drop-down menu, choose the appropriate feature set. The Search Results table lists all the features that are supported by the selected feature set (software image).
The following sections list the new and modified hardware and software features supported on the Cisco uBR10012 universal broadband routers in Cisco IOS Release 12.2(33)SCF:
– Hardware Features Integrated into Cisco IOS Release 12.2(33)SCF
There are no new hardware features in Cisco IOS Release 12.2(33)SCF5.
There are no new hardware features in Cisco IOS Release 12.2(33)SCF4.
There are no new hardware features in Cisco IOS Release 12.2(33)SCF3.
There are no new hardware features in Cisco IOS Release 12.2(33)SCF2.
There are no new hardware features in Cisco IOS Release 12.2(33)SCF1.
There are no new hardware features in Cisco IOS Release 12.2(33)SCF.
The following features introduced in an earlier Cisco IOS Release are now supported in Cisco IOS Release 12.2(33)SCF.
There are no new software features in Cisco IOS Release 12.2(33)SCF5.
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCF4.
The DHCPv6 with Full 6VPE Support feature introduced in Cisco IOS Release 12.2(33)SCF4 supports the following capabilities for IPv6 on the Cisco CMTS routers:
The following commands were modified:
For more information about this feature, see the IPv6 on Cable feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_ipv6.html
The depi cin-failover command enables CIN failure triggered line card switchover when DEPI control plane is used, and N+1 is configured. When the CPU utilization is high, DEPI CIN failover may get rejected. Starting Cisco IOS Release 12.2(33)SCF4 and later, cpu-thresold values can be configured using the depi cin-faiover cpu-threshold command.
For more information on the command, see Cisco IOS CMTS Cable Command Reference at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html
For more information about this feature, see M-CMTS DEPI Control Plane feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/m-cmts_depi_control_plane.html
The following feature introduced in an earlier Cisco IOS Release is now supported in Cisco IOS Release 12.2(33)SCF4:
Starting with Cisco IOS Release 12.2(33)SCG, the default queue size for the DOCSIS service flows (with bandwidth greater than 150 Mbps) is increased from 255 to higher values based on the bandwidth on the cable downstream interfaces. Additionally, the queue limit for all service flows can also be adjusted using the cable queue-limit command.
For more information, see the DOCSIS WFQ Scheduler on the Cisco CMTS Routers at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_docsis_wfq_sch.html
and the Cisco IOS CMTS Cable Command Reference at:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html
There are no modified software features in Cisco IOS Release 12.2(33)SCF4.
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCF3.
The Cable Modem Registration Throttling feature improves the cable modem online speed at initial ranging stage by reducing CPU usage.
The following commands were introduced or modified:
For more information about this feature, see the Cisco IOS CMTS Cable Command Reference guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html
There are no modified software features in Cisco IOS Release 12.2(33)SCF3.
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCF2.
The DOCSIS Extended Transmit Power feature, introduced in Cisco IOS Release 12.2(33)SCF2, supports extended upstream transmit power capability as defined in the DOCSIS3.0 Specification. This feature allows the cable modems to transmit at a high extended power level to counter the attenuation in the US channel.
The following commands were introduced or modified:
For more information about this feature, see Upstream Channel Bonding feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_uscb.html
In Cisco IOS Release 12.2(33)SCF2 and later, the cable multicast mdf-disable command with the wb-incapable-cm keyword disables multicast DSID forwarding (MDF) capability only on DOCSIS 2.0 hybrid cable modems. To disable MDF capability on all DOCSIS Set-Top Gateway (DSG) embedded cable modems, a new keyword, DSG, was introduced in Cisco IOS Release 12.2(33)SCF2.
For more information about this feature, see the DOCSIS 3.0 Multicast Support on the CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_d30_mcast_support.html
The Cisco IOS Release 12.2(33)SCF2 introduces Voice-Call Support on L2VPN CM feature. This feature enables the Cisco CMTS routers to support dynamic service flows on L2VPN-provisioned cable modems to permit voice calls from a non-L2VPN CPE.
To provide voice-call support on a L2VPN CM, you have to configure correct classifiers and create two static service flows (primary and secondary) using the cable modem configuration file.
For more information about this feature, see L2VPN Support over Cable feature guide at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_l2vpn.html
The Cisco IOS Release 12.2(33)SCF2 introduces support for the DHCP Relay Agent Information sub-option (DHCP Option 82, Suboption 9) enhancement to simplify provisioning of the CPE devices. Using this sub-option, the cable operators can relay the service class or QoS information of the CPE to the DHCP server to get an appropriate IP address.
The cable dhcp-insert service-class command was modified to support this feature.
For more information about this feature, see DHCP, ToD, and TFTP Services for the CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_services.html
In earlier releases, the test cable dcc command did not support transaction for dynamic channel change (DCC) when the cable modem was configured with IGMP and RSVP. Starting with Cisco IOS Release 12.2(33)SCF2, the force keyword allows users to manually move cable modems configured with IGMP and RSVP, when the DCC init-tech is set to 0.
For more information about this command, see the Cisco IOS CMTS Cable Command Reference guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html
Upstream traffic shaping uses queues to control the upstream data flow. The data packets are buffered in a queue on the CM to regulate traffic and avoid network congestion. Starting with Cisco IOS Release 12.2(33)SCF2, the Upstream Buffer Control for Maximum Queue Depth feature enables the Cisco CMTS to control the size of this queue (or buffer) by controlling the amount of data that can be enqueued for transmission at any point of time.
The following commands were added or modified:
For more information about this feature, see Configuring Upstream Cable Interface Features on the Cisco CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_upstrm_if.html
The following features introduced in an earlier Cisco IOS Release is now supported in Cisco IOS Release12.2(33)SCF2:
Cisco IOS Release 12.2(33)SCE5 introduces the Configurable DHCPv6 Relay Address feature on the Cisco CMTS routers. A DHCPv6 relay agent is used to send relay-forward messages from a source address to all configured relay destinations. The source address is either an IPv6 address provisioned on the network interface or a CMTS WAN IPv6 address. The relay destination can be a unicast address of a server, another relay agent, or a multicast address.
The ipv6 dhcp relay destination command was modified to support this feature.
For detailed information about this feature, see the IPv6 on Cable feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_ipv6.html
In Cisco IOS Release 12.2(33)SCE5, the PRE high availability is enhanced to address the PRE switchover issue in which both the PRE modules behave as the primary PRE modules. The line card uses a link loop mechanism when both the PRE modules behave as primary PRE modules. In this mechanism, the line card checks the packet sent from the active PRE module, and automatically does a switchover to the real active PRE. The link loop mechanism automatically connects to the new PRE module based on the MAC address, thus increasing robustness. This mechanism occurs before the IPC keepalive timeout mechanism occurs between the route processor and the line card.
The PRE high availability enhancement applies to both Stateful Switchover (SSO) and Route Processor Redundancy (RPR) modes on the Cisco uBR10012 router.
For detailed information on configuring Route Processor Redundancy, see Route Processor Redundancy for the Cisco uBR10012 Universal Broadband Router document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr10012_rtpro_red.html
For detailed information on configuring Stateful Switchover (SSO), see Stateful Switchover document at:
http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fssso20s.html
There are no modified software features in Cisco IOS Release 12.2(33)SCF2.
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCF1.
Effective with Cisco IOS Release 12.2(33)SCF1, the DOCSIS 3.0 static modem count-based load balancing is enhanced to use the dynamic bonding change (DBC) to modify parameters of DOCSIS 3.0 cable modem with multiple transmit channel (MTC) mode or multiple receive channel (MRC) mode without a primary channel change.
The cable load-balance docsis30-enable command is introduced to enable the DOCSIS 3.0 static modem count-based load balancing.
For more information about this feature, see Load Balancing, Dynamic Channel Change, and Dynamic Bonding Change on the Cisco CMTS Routers feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_load-bal_dcc.html , and
Restricted/General Load Balancing and Narrowband Dynamic Bandwidth Sharing with Downstream Dynamic Load Balancing feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/UBR_RLBG_GLBG_support.html
Cisco IOS Release 12.2(33)SCF1 supports IPv6 prefix stability on the Cisco CMTS as specified in DOCSIS 3.0 MULPI CM-SP-MULPIv3.0-I15-110210 standard. The IPv6 prefix stability allows an IPv6 home router to move from one Cisco CMTS to another while retaining the same prefix.
The multiple service operators (MSOs) can use this feature to allow their business customers (with IPv6 routers) to retain the same IPv6 prefix during a node split.
The IPv6 prefix stability is only supported with Cisco Network Registrar (CNR) version 8.1 or higher.
For more information about this feature, see IPv6 on Cable feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_ipv6.html
The Cisco IOS Release 12.2(33)SCF1 introduces support for Unitary DHCPv6 Leasequery protocol (RFC 5007) on the Cisco CMTS routers for upstream IPv6 source verification. This protocol verifies the authenticity of the IPv6 CPE behind a home or small office cable deployment.
The Unitary DHCPv6 Leasequery feature is only supported with Cisco Network Registrar (CNR) version 7.2 or higher.
The following commands are new or modified for Unitary DHCPv6 Leasequery feature:
For more information, see Cable DHCP Leasequery feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_flt_dhcp_lsqr.html
The following features introduced in an earlier Cisco IOS Release is now supported in Cisco IOS Release12.2(33)SCF1
From Cisco IOS Release 12.2(33)SCE4 onwards, the MDF capability is enabled by default on DOCSIS 2.0 hybrid cable modems to allow IPv6 packet forwarding. The cable multicast mdf-disable command was modified by adding the keyword wb-incapable-cm . This new keyword allows the cable multicast mdf-disable command to disable MDF on a wideband incapable cable modem.
For more information about this feature, see the DOCSIS 3.0 Multicast Support on the CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_d30_mcast_support.html
This feature enables the Cisco CMTS router to move all unicast secondary service flows (of a cable modem) to the primary channel interface (modular or cable), when a downstream channel impairment is reported by a cable modem via a CM-STATUS message. Only those unicast secondary service flows, which share the same wideband interface as the primary service flow, are moved to the primary channel interface.
The cable rf-change-trigger command was modified to support this feature.
For more information about this feature, see the Wideband Modem Resiliency feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_wm_resiliency.html
To support effective configuration of legacy LBGs on the Cisco uBR-MC3GX60V line card, the valid range for the legacy load balance group is changed in Cisco IOS Release 12.2(33)SCE4. In Cisco IOS Release 12.2(33)SCE3 and earlier, the valid range is from 1 to 80. In Cisco IOS Release 12.2(33)SCE4 and later, the valid range is from 1 to 256.
The following commands are new or modified:
For more information about this feature, see the Load Balancing and Dynamic Channel Change on the Cisco CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_load-bal_dcc.html
There are no modified software features in Cisco IOS Release 12.2(33)SCF1.
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCF.
The 802.1Q QoS Support on GiGE WAN feature introduces QoS on the Gigabit Ethernet WAN interface for 802.1Q packets, enabling the user to set priority bits to prioritize traffic.
The following commands are new or modified for 802.1Q QoS Support on GiGE WAN feature:
For more information about 802.1Q QoS Support on GiGE WAN feature, see the MQC QoS on the Cisco CMTS Routers feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_mqc_qos.html
The Automatic ROM Monitor (ROMMON) Upgrade feature enables the Cisco uBR10012 cable interface line cards to automatically update the ROMMON image whenever a newer version is available.
The ROMMON is a bootstrap program that initializes the hardware and boots up the Cisco IOS software when the Cisco CMTS (or cable interface line card) is powered on or rebooted. It is an integral part of the cable interface line card firmware, which provides basic services such as CPU initialization, memory mapping, and image relocation. The ROMMON image may require updates due to feature additions or enhancements. The Automatic ROMMON Upgrade feature enables the line card to upgrade the ROMMON image without user intervention. The user is informed about the upgrade status through error or warning messages.
The following new commands are introduced for the Automatic ROM Monitor (ROMMON) Upgrade feature:
For more information about this feature, see Automatic ROMMON Upgrade for Cisco Cable Interface Line Cards feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_aru.html
The Cable Modem Upstream RF Adaptation feature uses per cable modem physical layer statistics to identify and automatically move cable modems to another logical upstream channel within the same physical port. This is to prevent unnecessary channel-wide parameter changes, which reduces throughput, disrupts traffic flow for all modems, and causes modems to go offline in extreme cases.
The following commands are new or modified for the Cable Modem Upstream RF Adaptation feature:
For more information on this feature, see Cable Modem Upstream RF Adaptation feature guide at: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cm_upstream_rf_adaptation.html
In Cisco IOS Release 12.2(33)SCF, the ifIndex MIB object that pointed to the modular or integrated interfaces now points to the cable interface and RF channels Simple Network Management Protocol (SNMP) ifIndex of the Cisco uBR-MC3GX60V, Cisco UBR-MC20X20V, Cisco uBR-MC88V line cards, and Shared Port Adapters (SPA). Following are the MIBs and their tables where the ifIndex object points to the RF channel SNMP IF index:
In Cisco IOS Release 12.2(33)SCF, the following MIBs are modified to support:
For more information, see the Cisco CMTS Universal Broadband Router Series MIB Specifications Guide 12.2SC at the following URL:
http://www.cisco.com/en/US/docs/cable/cmts/mib/12_2sc/reference/guide/ubrmibv5.html
Cisco IOS Release 12.2(33)SCF now supports DOCSIS 3.0 carrier-to-noise plus interference ratio (CNiR) measurement. The term CNiR is part of the CableLabs nomenclature, and is same as the Carrier-to-noise ratio (CNR). Therefore these two terms, CNR and CNiR, can be used interchangeably.
In the previous releases, the CNR (CNiR) measurement was supported for only those upstream (US) channels that had Spectrum Management feature enabled. Starting with Cisco IOS Release 12.2(33)SCF, the CNR (CNiR) measurement is supported for all US channels, irrespective of whether Spectrum Management feature is enabled or not on the US channels.
The output of the show cable modem cnr command is modified.
For detailed information about the DOCSIS 3.0 CNiR Measurement feature, see the Spectrum Management and Advanced Spectrum Management for the Cisco CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_spctrm_mgt.html
This feature has the following enhancements over DOCSIS 2.0 load balancing:
The show cable load-balance docsis-group command was modified to support DOCSIS 3.0 Load Balancing feature.
For more information about this feature, see the Load Balancing and Dynamic Channel Change on the Cisco CMTS Routers feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_load-bal_dcc.html
Starting with Cisco IOS Release 12.2(33)SCF, the following the small form-factor pluggable (SFP) modules are supported on the Cisco uBR10012 routers:
For more information, see the Cisco uBR10012 Universal Broadband Router SIP and SPA Hardware Installation Guide and Cisco uBR10012 Universal Broadband Router SIP and SPA Software Configuration Guide at the following URLs: http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/uBR10012/hwsipspa.html http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/ubr10012/12.3_23_bc/sipsp_d3.html
The Fairness Across DOCSIS Interfaces feature introduces an adaptive mechanism to effectively distribute reservable bandwidth for committed information rate (CIR) flows and fair bandwidth for best-effort (BE) service flows across adjacent bonding groups (BGs).
The following commands are new or modified for the Fairness Across DOCSIS Interfaces feature:
For more information about this feature, see the Fairness Across DOCSIS Interfaces feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_acfe.html
The Inter Line Card RF Spanning feature supports sharing of downstream channels across line cards installed on the Cisco uBR10012 router. This feature is an extension to the existing downstream channel sharing functionality supported within the bonding groups configured on a single line card. This feature enables you to associate downstream channels of a line card to a service group that is hosted on a different line card.
The following commands are new or modified for the Inter Line Card RF Spanning feature:
For more information about the Inter Line Card RF Spanning feature, see the IGMP-Triggered VDOC Broadcast Support on the Cisco CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/VDOC_dbc_feature.html
In Cisco IOS Release 12.2(33)SCF, inter-process communication (IPC) is enhanced to provide better bandwidth to support new applications.
The service keyword is added to the show cmts ipc-cable client base command to display all the IPC service structures for all slots and subslots in the system. This information includes IPC port information, such as service type and port ID, retry and timeout information of the IPC messages, and watermark information in the request queue.
The show cmts ipc-cable client base command was modified to support the IPC enhancement.
For more information about IPC enmeshments, see Cisco IOS CMTS Cable Command Reference guide at the following URL :
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_17_show_ch_to_show_cr.html
In Cisco IOS Release 12.2(33)SCF, the IPv6 CPE router support is provided on the Cisco CMTS. The IPv6 CPE router is a node primarily for home or small office use that connects the end-user network to a service provider network. It is also referred to as the home router. The IPv6 CPE router is responsible for implementing IPv6 routing; that is, the IPv6 CPE router looks up the IPv6 destination address in its routing table and determines to which interface it should send the packet.
The following commands are new or modified for the IPv6 CPE Router Support on the Cisco CMTS feature:
For more information about the IPv6 CPE Router Support on the Cisco CMTS feature, see the IPv6 on Cable feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_ipv6.html
The 6PE & 6VPE feature represents an implementation of the provider edge (PE) based VPN model. This feature allows service providers to provide an IPv6 VPN service that does not require an upgrade or reconfiguration of the PE routers in the IPv4 MPLS core. The resulting IPv6 VPN service has a configuration and operation that is virtually identical to the current IPv4 VPN service.
For more information about 6PE & 6VPE feature, see the IPv6 on Cable feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_ipv6.html
The fatal interrupts received from the hardware components on the cable line cards result in reset and reload of the line cards, which triggers switchover and partial system downtime. The JIB3US Partial Reset feature significantly reduces this recovery time.
The cable line cards that use this feature include:
The show controllers cable jib command was introduced for the JIB3US Partial Reset feature.
For more information about this command, see the Cisco IOS CMTS Cable Command Reference at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_17_show_ch_to_show_cr.html
The L2VPN Pseudowire Redundancy feature enables you to configure a backup pseudowire in case the primary pseudowire fails.
The following commands are new or modified for the L2VPN Pseudowire Redundancy feature:
For more information about L2VPN Pseudowire Redundancy feature, see the MPLS Pseudowire for Cable L2VPN feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_mpls_pw.html
The MPLS Short-Pipe Mode feature introduces quality of service (QoS) service on the WAN interface for MPLS EXP bits, enabling the user to set priority bits for traffic prioritization.
The following commands are new or modified for the MPLS Short-Pipe Mode feature:
For more information about MPLS Short-Pipe Mode feature, see the MQC QoS on the Cisco CMTS Routers feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_mqc_qos.html
Starting with Cisco IOS Release 12.2(33)SCF, Service Independent Intercept (SII) taps can be configured to an IP address learned from a customer-premises equipment (CPE) router.
For more information, see the Service Independent Intercept on the Cisco CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_siiv2.html
In Cisco IOS Release 12.2(33)SCF, the following show commands are enhanced:
For detailed information about these commands, see the Cisco IOS CMTS Command Reference guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html
The Cisco CMTS Upstream (US) scheduler may report high CPU consumption because of extensive incoming bandwidth request processing. The Upstream Bandwidth Request Rate Limiting feature, which controls the CPU consumption of the US scheduler by monitoring the number of incoming bandwidth requests, and dropping excessive bandwidth requests.
The cable upstream rate-limit-bwreq exempted-priority command was introduced for the Upstream Bandwidth Request Rate Limiting feature.
For detailed information about the Upstream Bandwidth Request Rate Limiting feature, see the Upstream Scheduler Mode for the Cisco CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_upstm_sch_md.html
The following commands have been modified to verify the enhanced performance of the multicast feature:
For more information about these commands, see Cisco IOS CMTS Cable Command Reference guide at the following URL :
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html
The Internet Group Management Protocol (IGMP)-triggered Dynamic Channel Change (DCC) load balancing is introduced to avoid rejection of new video streams, either due to bandwidth constraints or repeated admission control failures on an interface. If there are admission control failures during a session request, the load balancing infrastructure provides a list of downstream channels to which the cable modem (CM) can be moved. Downstream channels that already carry the existing session replication are given preference.
The following commands are modified for the Video over DOCSIS Load Balancing for DOCSIS 2.0 Cable Modems feature:
For more information, see the Video over DOCSIS Load Balancing for DOCSIS 2.0 Cable Modems feature guide at the following URL: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/vdoc_igmp_lb.html
The voice multiple grants per interval (MGPI) feature enables the Cisco CMTS router to map multiple PacketCable or PacketCable Multimedia (PCMM) gates (application flows) to a single DOCSIS service flow using Unsolicited Grant Service (UGS) traffic profiles of the same cable modem. The application manager uses the UGS traffic profiles to explicitly set the number of grants per interval and place several application flows on a single gate. This results in an aggregated view for event messages, volume, and time usage limits.
The following commands are new or modified for the Voice MGPI feature:
For more information about the Voice MGPI feature, see the PacketCable and PacketCable Multimedia on the Cisco CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_pktcable_mm.html
Beginning with Cisco IOS Release 12.2(33)SCF, PacketCable and PacketCable Multimedia (PCMM) services are supported on embedded multimedia terminal adapters (E-MTAs). An E-MTA is a network element that contains the interface to a physical voice device, a network interface, and all signaling and encapsulation functions required for the VoIP transport, class features signaling, and QoS signaling.
For more information about the Voice Support Over DOCSIS 3.0 E-MTAs feature, see the PacketCable and PacketCable Multimedia on the Cisco CMTS Routers feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_pktcable_mm.html
The VRF Steering for Cisco CMTS Routers feature allows provisioning of data traffic from cable modems to be contained to a specified VRF instance. This feature addresses the need to accommodate more IPv4 addresses when customers run out of IPv4 addresses for their customer premise equipment (CPE). This solution helps customers expand their existing IP address space until they move to the IPv6 address mode.
The following commands are new or modified for the VRF Steering for Cisco CMTS Routers feature:
For more information about this feature, see the VRF Steering for Cisco CMTS Routers feature guide at the following URL :
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_vrf_steering.html
This section lists the modified software features in Cisco IOS Release 12.2(33)SCF.
Online Offline Diagnostics - Field Diagnostics is supported on the Cisco UBR10-MC20X20V cable interface line card.
For more information, see Online Offline Diagnostics - Field Diagnostics on Cisco uBR10012 Router Users Guide at the following URL:
http://www.cisco.com/en/US/docs/cable/cmts/ubr10012/troubleshooting/fdub10k.html
The following features introduced in an earlier Cisco IOS Release are now supported in Cisco IOS Release 12.2(33)SCF.
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:
http://tools.cisco.com/ITDIT/MIBS/servlet/index
If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check verifies that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password is e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:
http://tools.cisco.com/RPF/register/register.do
For information about the MIBs supported by the Cisco universal broadband routers, see the Cisco CMTS Universal Broadband Series Router MIB Specifications Guide.
The Cisco universal broadband routers include or add support for the following MIBs in Cisco IOS Release 12.2(33)SCF:
This section describes restrictions for the Cisco universal broadband routers in Cisco IOS Release 12.2(33)SCF.
For a list of unsupported hardware, see the End-of-Life and End-of-Sale Notices at:
http://www.cisco.com/en/US/products/hw/cable/ps2209/prod_eol_notices_list.html
This section describes other important guidelines or restrictions to consider when running Cisco IOS Release 12.2SC that might not yet be documented in the supporting customer documentation.
The Cisco uBR10012 universal broadband router TCC card does not work as expected when the startup configuration contains the configuration for a Cisco uBR10012 universal broadband router TCC+ card. To fix this issue, use the no card slot / subslot 2cable-tccplus command and then configure the DTI card.
Payload Header Suppression (PHS) is not supported on wideband Embedded Media Terminal Adapters (eMTAs) for dynamic downstream service flows.
While performing an OIR of the PCMCIA disk on PRE2, the System Event Archive (SEA) application and other applications such as IPDR write details to the PCMCIA disk on PRE2.
Before performing the OIR, the multiple system operator (MSO) must disable the write access to the PCMCIA disk on PRE2 using the cable filesystem [enable | disable] command. For more information, see the CSCsz77977 .
Statistics for two different divert-rate limit (DRL) WAN-IP streams can momentarily overlap or collide and produce statistics that are lower than expected.
The issue occurs on upstream channels that use a shared connector, where the other upstream channel using the same shared connector is on another downstream and is shutdown. To workaround this issue, you can activate the downstream and other upstream channel using the same shared connector or temporarily unshare the upstream connector.
If you configure a wideband interface with more than one MAC domain host sharing the committed information rate (CIR) bandwidth, then the total wideband interface CIR bandwidth gets fragmented among the MAC domain (MD) hosts sharing the wideband interface CIR bandwidth.
The WB interface CIR bandwidth can be shared by multiple MAC domain hosts, and these MAC domain hosts could potentially be on the same or different cable line cards. As admission control for WB interfaces occurs on cable line cards, the available CIR bandwidth gets partitioned and is given to the MD hosts causing the bandwidth fragmentation. However if a typical service flow CIR is very small compared to the total CIR of the wideband interface, then this fragmentation is not visible until the CIR usage reaches very high levels close to the total interface bandwidth.
With certain bandwidth percentage configuration and traffic distribution, the overall link utilization of dynamic bandwidth sharing (DBS) can be as low as 85 percent. For example, this can occur if the traffic rate on a wideband interface is smaller than its configured bandwidth percentage, but the traffic rate on a modular-cable interface is much larger than its bandwidth percentage. The packet drops occur only on the modular-cable interface which has a larger amount of traffic than its bandwidth-percentage. To workaround this scenario, configure a higher bandwidth percentage to the modular-cable interface, which is larger than or equal to its expected or average traffic rate.
If the Cisco CMTS receives IP packets larger than its default buffer size (8192), the CMTS cannot process these packets. This causes IP fragment issues on the Cisco CMTS.
NoteThis section describes important changes in various Cisco IOS Releases that differ from support found in earlier software releases supported by the Cisco CMTS routers. This section is subject to change and is not intended to cover all changes found in the software. There may be other changes within the software that are not identified here, such as within the new and modified features. Closely read this release notes in their entirety, as well as review the related caveats documents for more information.
Table 6 identifies some of the key changes that you should consider when running Cisco IOS Release 12.2(33)SCF.
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Clearing Address Resolution Protocol (ARP) Entries Using the clear arp command can take about 15 seconds to remove all ARP table entries. |
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Point-to-Point over Ethernet Configuration For Point-to-Point over Ethernet (PPoE) configuration on the Cisco uBR7200 series routers, the bba-group command replaces the vpdn-group command. The software automatically converts an existing vpdn-group configuration to bba-group global configuration. After the configuration of bba-group , you cannot configure PPoE at the virtual private dialup network (VPDN) level. You need to use the bba-group configuration. |
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RPF on the Cisco uBR10012 router requires configuration of the ip verify unicast source reachable-via rx allow-default command to properly interpret default routes. |
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The DOCSIS Weighted Fair Queuing (WFQ) Scheduler replaces the Versatile Traffic Management System (VTMS) scheduler operation on the Cisco uBR10012 router. For more information, see the feature documentation at: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_docsis_wfq_sch.html |
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SPA Interface Processor/Shared Port Adapters
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/ubr10012/12.3_23_bc/10fpd.html |
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The Spatial Reuse Protocol (SRP) for the Cisco uBR10012 OC-48 line card is not supported. |
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Modular QoS CLI Change Between Cisco IOS Release 12.3BC and Cisco IOS Release 12.2SC and the DOCSIS WFQ Implementation The priority command does not have any arguments. You must use the police command to specify a guaranteed bandwidth. |
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To support logical channel feature, the ordering of the "channel-width" and "docsis-mode" parameters have changed in the cable upstream docsis-mode and cable upstream channel-width commands. Because "channel-width" is a physical channel level parameter, it must be configured before "docsis-mode", which is a logical channel level parameter. For more details on this feature, see the SCDMA and Logical Channel Support on the Cisco CMTS Routers at the following location: http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_d30_scdma_lc.html |
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Behavior Change in DOCSIS Set-top Gateway Tunnel When the DOCSIS Set-top Gateway (DSG) is configured to have a quality of service (QoS) for the DSG tunnel, ensure that the default multicast QoS (MQoS) is configured by using the following command: where service class name is any service class name.
This behavior is observed only when you toggle (enable/disable) the default MQoS. |
For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service request, and gathering additional information, see What’s New in Cisco Product Documentation at: http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html .
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