Cisco cBR Converged Broadband Routers DOCSIS Software

CWErr Downgrade Statistics Interval Alignment

This feature reduces the time taken to perform OFDMA CwErr (Codeword Error) profile downgrades. The enhancement improves this by synchronizing the profile management check time to the hardware statistics updates and shortening the statistics update time to a 5-second interval read for Channel/sid stats. This allows the OFDMA CwErr downgrade process to assess and react faster.

Command Introduced: cable upstream ofdma-prof-mgmt downgrade synchronized.

Channel set of a modem to be continually reassessed over time based on the power capability of the modem and current plant attenuation

Modems with limited transmit power ceiling are assigned a single upstream OFDMA channel as their upstream bounding group. These modems continue to be close to their maximum transmit power with a single OFDMA and experience upstream data error issues. The preference is for these modems to drop its bonding group to a group of ATDMA channels instead of a single OFDMA channel.

After a modem comes online, the CMTS software will continue monitoring the modem transmit power and perform upstream bonding group (UBG) adjustment if the modem transmit power moves higher. If the modem’s transmit power moves lower, the CMTS will move the modem to use higher frequency width UBG.

Kafka support for channel set of a modem to be continually reassessed over time

System level notifications for power monitoring downgrade and upgrade have been added for Kafka telemetry using cm.event.us.dynpwr.

cBR8 SNMP MIBs to convert to gRPC for Kafka Bus

To lower cBR8 SUP IOSd CPU and offload some SNMP polling to a streaming telemetry method, this feature converts the first phase of frequently polled MIB OIDs to put on the cBR8 Kafka bus. Kafka license is required, GPB file is available upon request.

SCQAM D30 RxPower MIB Updates

The feature updates the calculation and reference behavior for two specific MIBs:

docsIf3CmtsCmUsStatusRxPower

docsIf3CmtsSignalQualityExtExpectedRxSignalPower

The MIBS are updated to channel width based on configured channel bandwidth. This aligns with the CableLabs specification.

Static Pseudowire for Broadcast Video

This feature allows the setup of a static pseudowire (SPW) for broadcast video, which requires fewer cBR-8 routers and allows for a more manageable broadcast maintenance environment.

Convert cBR8 logs to be monitored in CSPC – Part 1

The CX Automated Fault Management (AFM) tool reads syslog messages from a syslog server. The CX Common Services Platform Collector (CSPC) tool is responsible for collecting syslog messages from the cBR8 and sending them to the syslog server. Forwarding rules can be configured for CSPC to define which messages are forwarded from the syslogs to a syslog server. This feature is Part 1 of converting the syslog format to be compatible with AFM.

Cisco cBR Converged Broadband Routers DOCSIS Software

AQP Expansion Classic SF QoS Parameters

US AQP Expansion Cisco Mode is a feature that allows configuration of QoS parameters for upstream channels on cable modems using a new mode, referred to as "cisco-mode". This mode simplifies the configuration process by enabling automatic inheritance of QoS parameters from the Service Flow TLV (SF TLV) entry in the cable modem's configuration file. This helps maintain existing service tiers while allowing for dynamic rate limiting, thereby avoiding the need for configuring new Service Class Names (SCNs) and Adaptive QoS Profiles (AQPs) for each desired class of service.

Cable Trust-Last

This feature enables you to configure an exception to Cable Source-Verify, where the last (or latest) static IP/MAC/MD/SID address entry is trusted instead of the first entry based on matching either the configured MAC address (cable trust-last) or the configured IP address (Source Address Validation trust-last).

Commands Added:

• cable trust-last trust-last host mac-address

• cable source-verify enable-sav-trust-last

• cable source-verify sav-static-group-override group-name [trust-first|trust-last]

DS Resilency Commands for Google Protocol Buffer

In this release, the output of various DS Resiliency show commands are streamed over Kafka in Google Protocol Buffer.

The DS resiliency Kafka Telemetry Messages publish event data that is related to the downstream (DS) channel status and partial service events using Kafka topics. This feature is designed for service providers to monitor and manage the health and status of cable modems and channels using streaming telemetry in GPB format.

Commands Added:

• cable telemetry periodic-timer timer-name interval interval-time

• cable telemetry message ds-ctrlr-status periodic-timer timer-name

• cable telemetry message cm-partial-service periodic-timer timer-name

Frequency Overlap

The frequency overlap feature allows you to manage overlapping frequencies between DOCSIS channels and Out-Of-Band (OOB) channels in Cisco's cBR8 systems. It is specifically designed for customers to skip frequency validation for OOB with DOCSIS, enabling configuration of other vendors' Remote PHY Devices (RPDs) with overlapping frequencies. This feature maintains frequency validation between DOCSIS channels and Video channels.

IPv6 Support for KMAN

IPv6 Support for KMAN is a feature that enhances the existing KMAN infrastructure to enable:

• IPv6 support for KMAN in addition to existing IPv4 support. Configuration of either IPv6 or IPv4 for the cBR-8 Kafka bus is available.

• The operator to use KMAN to override the source address that is used for both IPv4 and/or IPv6.

Maximum Upstream Channel Frequency Upgrade for NDR Profile

With this release, the maximum configurable upstream channel frequency is increased from 25.6 Mhz to 65 Mhz.

The supported range is 5 Mhz - 65 Mhz.

Operational Commands to Display Specific RF Ports

This feature involves the enhancement of the CLI command show cable modem rpd-name to include options for specifying downstream (dsport) and upstream (usport) ports. The purpose is to provide detailed information about the RF ports that cable modems are connected to, allowing users to identify the specific downstream and upstream RF ports that are associated with a particular Remote PHY Device (RPD).

PNM TFTP Support for IPv6 Using the KMAN Process

Proactive Network Maintenance (PNM) TFTP Support for IPv6 is a feature that enhances the existing PNM infrastructure to enable IPv6 support for transferring RxMER, AQProbe, and UTSC data files to TFTP servers. This feature allows network administrators to access upstream information using IPv6, facilitating better management and troubleshooting of network performance issues.

PMA polls the cBR-8 router via SNMP to schedule the PNM data collection via TFTP. The IP address for PNM TFTP can be configured as an IPv6 address.

Command Added: cable kman source ipv6 IPv6-Address .

Support For Device Class on IPv6 CPE

The IPv6 CPE Device Class feature allows you to view the device class information for Customer Premise Equipment (CPE) connected to cable modems.

The device class is an important identifier that is used to categorize the type of equipment connected, such as Cable Modem, PS, MTA, STB, DVA, EROUTER, or HOST.

Command Updated: show cable modem mac | ip ipv6 cpe . With this release, this command displays the device class name in the output.

Support to Configure Kafka IP Address

This release supports IOS Loopback address for KMAN so that TFTP/Kafka packets use an IPv4/IPv6 Loopback address as the L3 Source address.

Command Introduced: cable kman source [ipv4 | ipv6] ipv4-or-ipv6-address

Cisco cBR Converged Broadband Routers DOCSIS Software

Downstream PMA Support for Remote PHY

With this release, Downstream PMA is supported on Remote PHY. This feature enables dynamic profile management of OFDM channels on RPD.

This feature enables you to modify modulation profiles of an OFDM channel, when the channel is in service. This allows the cable operation application to dynamically change the modulation characteristics of an OFDM channel in a non-disruptive manner to online cable modems connected via RPD and subscriber traffic. The operator can accomplish this using Profile Management Application (PMA).

Cisco cBR Converged Broadband Routers DOCSIS Software

Cisco Smart Licensing Updates

With this release,

• Traditional license users can enable the SGMAX License to unlock unlimited upstream and downstream capacity for the existing line cards.

  Note	The SGMAX license and Flexible Consumption Model (FCM) license are mutually exclusive.

• You can enable the TELEMETRY License to activate the Kafka telemetry feature.

Commands added:

• cable telemetry enable

• cable license enable-SGMAX

Command updated: show license summary

CWErr Downgrade Stats Interval Alignment

The OFDMA profile management codeword error downgrade feature, downgrades a modem’s OFDMA channel IUC when codeword errors are seen on that channel. Statistics updates include updating the codeword statistics for each modem and channel but are not synchronized to the profile management downgrade processing.

With this release, downgrade processing syncs with the statistics upgrades. The feature is enabled with the below command combined with an ofdma-prof-mgmt downgrade interval that is evenly divisible by 10.

Command Introduced: cable upstream ofdma-prof-mgmt downgrade synchronized.

In-Service Software Upgrade (ISSU) Enhancements

In-Service Software Upgrade (ISSU) is a process that upgrades an image to another image on a device while the network continues to forward packets.

With this release, the ISSU process is simplified and can be executed with a single command for ISSU upgrades. This is applicable for ISSU upgrades from Cisco IOS XE Dublin 17.15.1w to future Cisco IOS XE releases.

IPC Bus Failure Detection

An IOSD process is created to periodically check the DOCSIS IPCCL port status. On the SUP side, if the line card is still online but the IPCCL session is down for 2 minutes, then it reloads the line card.

With this release, you can ensure that the IPC status on IOSd-SUP and IOSd-CLC are the same using a keepalive mechanism.

Command Introduced: platform ipccl disable-ka-reload

IPDR Schema Update

With this release, IPDR Schemas are updated and comply with the latest updates from CableLabs.

• DOCSIS-CMTS-DS-UTIL-STATS-TYPE latest supported version is 3.5.1-A.4. This version supports the RecCreationTime field.

• DOCSIS-CM-REG-STATUS-TYPE latest supported version is 3.7-B.3. This version adds the following constraints to TcsPhigh:

  <restriction base="unsignedShort">
          <minInclusive value="68"/>
          <maxInclusive value="320"/>
          <enumeration value="0"/>
  </restriction>

ROMMON Enhancements

With this release, the ROMMON version is upgraded to 17.15(1r)S. The 17.15(1r)S ROMMON version supports image sizes up to 4 GB.

Earlier ROMMON versions only support image sizes up to 2.6 GB.

While upgrading to Cisco IOS XE Dublin 17.15.1w, ROMMON autoupgrades to version 17.15(1r)S.

For Cisco IOS XE images of size 2.6 GB - 4 GB, ROMMON version upgrade to 17.15(1r)S is compulsory to sucessfully upgrade Cisco IOS XE Dublin 17.12.1z2 or earlier releases to Cisco IOS XE Dublin 17.15.1w or later.

Support for 128 RPDs per Line Card

With this release,

• A cBR-8 chassis (7 active line cards + 1 protect line card) configured with 128x7 RPDs, can maintain up to 256000 L2TP sessions.

• cBR-8 supports 128 RPDs per Line Card. A total of 32 DOCSIS Service Groups + 32 Video Service Groups can be configured on a Kobol-R line card (CBR-CCAP-LC-G2-R). This adds support for an additional 32 new Video Service Groups (downstream-video) in addition to the existing 32 Service Groups (downstream-cable).

Support For OFDMA 4096-QAM Modulation Order

A globally configured OFDMA modulation profile defines modulation orders and pilot patterns for different interval usage codes (IUC). You can also use it to assign parameters for initial ranging and fine ranging. This release adds support for the 4096-QAM modulation order.

Enhancing cdxcmtscmonoffnotification notification

The cdxcmtscmonoffnotification notification is enhanced to retrieve the following details as well, along with on and off status of the modem:

• Fiber Node ID

• RPD Mac Address

• RPD Alias

• RPD US/DS port

• Modem Registration Time

Enhancing show cable rpd-md association command

The command show cable rpd-md association has been enhanced to retrieve the following details:

• RPD Name

• Fiber Node ID

Improved IMPDS Character limit for show cable modem select command

The new implementation of show cable modem select command aims to increase the size and display all possible Impaired Downstreams (IMPDs) to the console.