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Configuring the Cisco uBR-MC28U/MC28X Cable Interface Line Card

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Configuring the Cisco uBR-MC28U/X Cable Interface Line Card

Table Of Contents

Configuring the Cisco uBR-MC28U/X Cable Interface Line Card

Contents

Prerequisites for Cisco uBR-MC28U/X

Important—Upgrading to Cisco IOS Release 12.2(15)CX1 and 12.2(15)BC2

Restrictions for Cisco uBR-MC28U/X

Information About Cisco uBR-MC28U/X

Feature Overview

Modes of Operation

Physical Description

DOCSIS 2.0 A-TDMA Support

Upgrading from a Cisco uBR-MC28C Card

Other Differences with the Cisco uBR-MC28C Card

Benefits

How to Configure the Cisco uBR-MC28U/X Card

Configuring the Scheduler Allocate Values

Creating Modulation Profiles

Creating a TDMA Modulation Profile

Creating a Mixed Mode Modulation Profile

Creating an A-TDMA Modulation Profile

Configuring and Enabling the Downstream Ports

Configuring and Enabling the Upstream Ports

Shutting Down a Downstream Port

Configuring Spectrum Management on the Cisco uBR-MC28U/X Card

Monitoring the Cisco uBR-MC28U/X Cable Interface Line Card

Verifying a Downstream Port and Integrated Upconverter

Verifying Downstream Center Frequency

Verifying the Upstream Port

Displaying Cable Modulation Profiles

Displaying Cable Modem Capabilities and Provisioning

Configuration Examples for Cisco uBR-MC28U/X Card

Modulation Profiles

Default Modulation Profiles

DOCSIS 1.0/DOCSIS 1.1 TDMA Modulation Profiles

Mixed TDMA/A-TDMA Modulation Profiles

DOCSIS 2.0 A-TDMA Modulation Profiles

Cisco uBR-MC28U/X Cable Interface Configurations

DOCSIS 1.X Configuration

DOCSIS 2.0 ATDMA Configuration

EuroDOCSIS 1.X Configuration

EuroDOCSIS 2.0 ATDMA Configuration

System Error Messages

MCU

MCUCLC

MCUFSM

UBR7200

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference


Configuring the Cisco uBR-MC28U/X Cable Interface Line Card


This document describes the Cisco uBR-MC28U/X cable interface line card, which is a next-generation Data-over-Cable Service Interface Specifications (DOCSIS) Broadband Processing Engine (BPE) for the Cisco uBR7246VXR universal broadband router. The card provides two downstream ports and eight upstream ports configured in two independent CMTS MAC domains.

The Cisco uBR-MC28U/X card supports DOCSIS 1.1 and EuroDOCSIS 1.1 Time Division Multiple Access (TDMA) modulation profiles, and also provides improved Radio Frequency (RF) performance, higher performance, and advanced spectrum management capabilities. The card also supports the Advanced Time Division Multiple Access (A-TDMA) modulation profiles used in DOCSIS 2.0 and EuroDOCSIS 2.0 networks.

Feature Specifications for Cisco uBR-MC28U/X Cable Interface Line Card

Feature History
Release
Modification

Release 12.2(15)CX

This feature was introduced for the Cisco uBR7246VXR router.

Release 12.2(15)CX1

The modulation profiles were optimized for the Cisco uBR-MC28U/X card.

Release 12.2(15)BC2

Support was added to Cisco IOS Release 12.2 BC.

Note See the "Important—Upgrading to Cisco IOS Release 12.2(15)CX1 and 12.2(15)BC2" section for important information on using Cisco IOS Release 12.2(15)CX1 or 12.2(15)BC2.

Supported Platforms

Cisco uBR7246VXR router


Finding Support Information for Platforms and Cisco IOS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

Contents

This document includes the following major sections:

Prerequisites for Cisco uBR-MC28U/X

Restrictions for Cisco uBR-MC28U/X

Information About Cisco uBR-MC28U/X

How to Configure the Cisco uBR-MC28U/X Card

Monitoring the Cisco uBR-MC28U/X Cable Interface Line Card

Configuration Examples for Cisco uBR-MC28U/X Card

System Error Messages

Additional References

Command Reference

Prerequisites for Cisco uBR-MC28U/X

The Cisco uBR-MC28U/X cable interface line card has the following prerequisites:

The Cisco uBR-MC28U/X card is supported only in a Cisco uBR7246VXR universal broadband router.

The Cisco uBR7246VXR router must be configured with the default scheduler allocate values, using the scheduler allocate 4000 400 command, to support the Cisco uBR-MC28U/X card. Otherwise, the router might not provide sufficient resources for the processes on the Cisco uBR-MC28U/X card, resulting in the card resetting during periods of heavy use.

The Cisco uBR-MC28U/X card provides the same number of downstream and upstream ports as the Cisco uBR-MC28C card, but the two cards are not identical. Because the cards are different, the Cisco uBR7246VXR does not preserve the card configuration if you replace a Cisco uBR-MC28C card with a Cisco uBR-MC28U/X card. If you intend to replace the older cards with the newer cards, you must reconfigure the newer cards after they have been installed.


Tip To preserve the existing configuration when replacing the Cisco uBR-MC28C card with a Cisco uBR-MC28U/X card, save the existing configuration using the copy running-config startup-config command. Then remove the old card and insert the new card. Restore the saved configuration using the copy startup-config running-config command. Then see the "Upgrading from a Cisco uBR-MC28C Card" section for information on the additional commands that are needed. (If using the Cisco uBR-MC28U card, at the very least you must use the cable downstream rf-power and no cable downstream rf-shutdown commands to enable each downstream's integrated upconverter.)


The Cisco uBR7246VXR router must be using an NPE-400 or UBR7200-NPE-G1 processor that is running Cisco IOS Release 12.2(15)CX. If you try to use the Cisco uBR-MC28U/X card on a router with a different processor, the following error message is displayed on the console:

%MPU-3-LOWCPU: MCU port adapter in Slot [dec] requires CPU card type NPE400 or higher
 
   

Tip The NPE-400 processor must have at least 128 MB of DRAM memory, and the UBR7200-NPE-G1 processor must have at least 256 MB of DRAM memory to support the Cisco uBR-MC28U/X card. However, if you are using more than one Cisco uBR-MC28U/X card, Cisco recommends installing 256 MB of DRAM memory on the NPE-400 processor, and installing either 512 MB or 1 GB of DRAM memory on the UBR7200-NPE-G1 processor, to ensure best performance.


Cable modems must be DOCSIS-compliant. If cable modems go offline, or appear to be online but do not pass traffic when in the mixed TDMA/ATDMA mode, upgrade the modem software to a DOCSIS-compliant version.

The following are required to support the DOCSIS 2.0 ATDMA features:

Cable modems must be DOCSIS 2.0 capable.

The DOCSIS configuration file for the cable modem must either omit the DOCSIS 2.0 Enable field (TLV 39), or it must set TLV 39 to 1 (enable). If you set TLV 39 to 0 (disable), a DOCSIS 2.0 CM uses the TDMA mode.

The upstream must be configured for either ATDMA-only or mixed TDMA/ATDMA mode. To use the 6.4 MHz channel width, the upstream must be configured for ATDMA-only mode.

Complete a basic configuration of the Cisco uBR7246VXR router; this includes, at a minimum, the following tasks:

Configure a host name and password for the router.

Configure the router to support Internet Protocol (IP) operations.

Install and configure at least one WAN adapter to provide backbone connectivity.

Determine a channel plan for your Cisco uBR7246VXR router and all of its cable interfaces.

Verify that your headend site includes all necessary servers to support DOCSIS and Internet connectivity, including DHCP, ToD, and TFTP servers.

The system clock on the Cisco uBR7246VXR router should be set to a current date and time to ensure proper communications between the Cisco uBR-MC28U/X card and NPE processor card.

Important—Upgrading to Cisco IOS Release 12.2(15)CX1 and 12.2(15)BC2

Cisco IOS Release 12.2(15)CX1 and 12.2(15)BC2 have optimized the default modulation profiles for the Cisco uBR-MC16U/X and Cisco uBR-MC28U/X cable interface line cards. When upgrading to Cisco IOS Release 12.2(15)CX1 or 12.2(15)BC2 from 12.2(15)CX, you need to delete the existing default profiles to force the Cisco uBR7246VXR router to replace them with the new, optimized profiles. To do this, give the following commands at the global configuration mode prompt:

no cable modulation profile 41 
no cable modulation profile 141 
no cable modulation profile 241 
 
   

This procedure needs to be done only once, after a router running Cisco IOS Release 12.2(15)CX has been upgraded to Cisco IOS Release 12.2(15)CX1 or 12.2(15)BC2.

Restrictions for Cisco uBR-MC28U/X

The Cisco uBR-MC28U/X feature has the following restrictions and limitations:

Supports all cable interface line card features in Cisco IOS Release 12.2(15)BC1, except for the following, which are not supported. These features are expected to be supported in a future release of the Cisco IOS Release 12.2 BC train.

Spectrum management of DOCSIS 2.0 mixed-mode and A-TDMA upstreams. This includes guided frequency hopping, dynamic upstream modulation, and proactive CNR-based frequency hopping and channel width changes. These features are supported only for DOCSIS 1.X TDMA-only channels.


Note Advanced hardware-based spectrum management is still supported for the DOCSIS 1.0/1.1 TDMA-only mode, and is scheduled to be supported for A-TDMA operations in a future release of the Cisco IOS software.


Cable Monitor

Communications Assistance for Law Enforcement Act (CALEA) support

Cisco CMTS Load Balancing

PacketCable

Port bundling

N+1 HCCP redundancy

Subscriber Traffic Management

Transparent LAN Service over Cable (cable l2-vpn-service command)

Virtual interfaces

Both downstreams on the Cisco uBR-MC28U/X must be set for the same Annex mode using the cable downstream annex command (either Annex A or Annex B).

On the Cisco uBR-MC28U (with integrated upconverter), the IF frequency is fixed at 44 MHz for both Annex A and Annex B modes of operation. The Cisco uBR-MC28X (without integrated upconverter) outputs an IF frequency at 36.125 MHz in Annex A mode and at 44 MHz in Annex B mode (as configured by the cable downstream annex command).

The center frequency for the downstreams on the Cisco uBR-MC28U/X (as configured by the cable downstream frequency command) must be specified in 250 KHz increments.

When changing the symbol rate, the show controller cable upstream command may show US phy SNR_estimate - Unknown for a brief period of time. Wait a moment and reissue the command to obtain an accurate SNR value.

The configuration of the downstream and upstream ports is fixed into the two domains that are listed in Table 3.

Cisco IOS Release 12.2(15)CX and 12.2(15)BC2 support a maximum of 10 modulation profiles for each of the three DOCSIS modes (DOCSIS 1.x TDMA, mixed, and DOCSIS 2.0 A-TDMA), for a total maximum of 30 modulation profiles.

Changing the DOCSIS mode of an upstream takes all cable modems on that upstream offline, which forces the cable modems to reregister, so that the CMTS can determine the capabilities of the cable modems on the new channels.

Packet filters can be created on the Cisco uBR-MC28U/X using the standard SNMP commands, but cannot be created using command line interface (CLI) commands.

The packet counters that are displayed by the show interface cable and show interface cable service-flow counters commands could show slight differences in the byte counts. This is because the show interface cable command uses the actual byte count, while the counters option assumes that all packets that are smaller than the minimum packet size actually have the minimum number of bytes.

Also, the NPE processor on the Cisco uBR7246VXR router periodically collects the packet statistics from the Cisco uBR-MC28U/X card every five seconds, the counters shown by the show commands are not actual real-time statistics but could reflect up to a five-second delay in showing the actual network activity.

For optimum performance, do not change the default value of the scheduler allocate command (scheduler allocate 4000 400) on the Cisco uBR7246VXR router.

Debug Output to the Console Can Be Incomplete

Cable interface line cards that have their own onboard processor, such as the Cisco uBR-MC28U/X card, initially collect the debug messages and then pass them on to the processor card using interprocess communications (IPC) messages. Because a large volume of debug messages could interfere with normal operations, especially when messages are sent to the console, debug messages are subject to rate-limiting that could drop part of abnormally large messages.

To avoid missing parts of the debug output, enabling logging to a buffer, using the logging commands. Then use the show logging slot command to display the results for the specific cable interface line card.

If you do not need or desire timestamps on the debug messages, you can reduce the volume of output by turning off timestamps for debug messages using the no service timestamps debug datetime msec command.

Show Interface Counters are Separate for Master and Slave Interfaces

The Cisco uBR-MC28U/X card uses a distributed architecture that does not include the slave interface input packet counters when you use the show interface command to display information for a master cable interface. This is different than normal behavior for most Cisco interfaces, where the input packet counters on the master interface include the input packet counts for all associated slave interfaces. On the Cisco uBR-MC28U/X card, you must use the show interface command on both the master and slave cable interfaces to get a total count of the input packets.

Information About Cisco uBR-MC28U/X

This section describes the Cisco uBR-MC28U/X cable interface line card:

Feature Overview

DOCSIS 2.0 A-TDMA Support

Upgrading from a Cisco uBR-MC28C Card

Other Differences with the Cisco uBR-MC28C Card

Benefits

Feature Overview

The Cisco uBR-MC28U and Cisco uBR-MC28X (Cisco uBR-MC28U/X) cards each contain two downstream ports and eight upstream ports. In Cisco IOS Release 12.2(15)CX, the downstream ports support 64-QAM and 256-QAM, and the upstream ports support QPSK, 8-QAM, 16-QAM, 32-QAM, and 64-QAM modulation, depending on the upstream's mode of operation.

The Cisco uBR-MC28U and Cisco uBR-MC28X cards are two of the new Broadband Processing Engine (BPE) series of cable interfaces that are available for the Cisco uBR7246VXR universal broadband router. The BPE cards provide increased performance and advanced Radio Frequency (RF) management, as well as innovative, integrated tools for sophisticated content, traffic and network management.

Modes of Operation

Depending on the configuration, the Cisco uBR-MC28U/X line card supports either DOCSIS or Euro-DOCSIS operation:

DOCSIS cable networks are based on the ITU J.83 Annex B physical layer standard and Data-over-Cable Service Interface Specifications (DOCSIS, Annex B) specification, which use 6 MHz National Television Systems Committee (NTSC) channel plans. In this mode, the downstream uses a 6 MHz channel width in the 85 to 860 MHz frequency range, and the upstream supports multiple channel widths in the 5 to 42 MHz frequency range.

EuroDOCSIS cable networks are based on the ITU J.112 Annex A physical layer standard and European DOCSIS (EuroDOCSIS, Annex A) specification, which use 8 MHz Phase Alternating Line (PAL) and Systeme Electronique Couleur Avec Memoire (SECAM) channel plans. In this mode, the downstream uses an 8 MHz channel width in the 85 to 860 MHz frequency range, and the upstream supports multiple channel widths in the 5 to 65 MHz frequency range.


Note The difference between DOCSIS and EuroDOCSIS is at the physical layer. To support a DOCSIS or EuroDOCSIS network requires the correct configuration of the Cisco uBR-MC28U/X card, as well as upconverters, diplex filters, and other equipment that supports the network type.


When operating in the DOCSIS mode of operation, the Cisco uBR-MC28U/X card supports the following types of DOCSIS networks:

TDMA-only mode, which supports only DOCSIS 1.0 and DOCSIS 1.1 cable modems.

A-TDMA-only mode, which supports DOCSIS 2.0 cable modems.

Mixed TDMA/A-TDMA mode, which supports both DOCSIS 1.0/DOCSIS 1.1 and DOCSIS 2.0 cable modems on the same upstream.

The Cisco uBR-MC28U/X card supports all DOCSIS 1.1-specified and all DOCSIS 2.0-specified ATDMA radio frequency (RF) data rates, channel widths, and modulation schemes. Table 1 shows the maximum supported DOCSIS 1.1 data rates, and Table 2 shows the maximum supported DOCSIS 2.0 (ATDMA-mode) data rates.

Table 1 Maximum DOCSIS and EuroDOCSIS 1.1 Data Rates

Upstream Channel Width
Modulation Scheme
Baud Rate Sym/sec
Maximum
Raw Bit Rate Mbit/sec

3.2 MHz

16-QAM
QPSK

2.56 M

10.24
5.12

1.6 MHz

16-QAM
QPSK

1.28 M

5.12
2.56

800 kHz

16-QAM
QPSK

640 K

2.56
1.28

400 kHz

16-QAM
QPSK

320 K

1.28
0.64

200 kHz

16-QAM
QPSK

160 K

0.64
0.32


Table 2 Maximum DOCSIS and EuroDOCSIS 2.0 (ATDMA-mode) Data Rates 

Upstream Channel Width
Modulation Scheme
Baud Rate Sym/sec
Maximum
Raw Bit Rate Mbit/sec

6.4 MHz

64-QAM
32-QAM
16-QAM
8-QAM
QPSK

5.12 M

30.96
25.80
20.64
15.48
10.30

3.2 MHz

64-QAM
32-QAM
16-QAM
8-QAM
QPSK

2.56 M

15.48
12.90
10.30
7.68
5.12

1.6 MHz

64-QAM
32-QAM
16-QAM
8-QAM
QPSK

1.28 M

7.68
6.45
5.12
3.84
2.56

800 kHz

64-QAM
32-QAM
16-QAM
8-QAM
QPSK

640 K

3.84
3.20
2.56
1.92
1.28

400 kHz

64-QAM
32-QAM
16-QAM
8-QAM
QPSK

320 K

1.92
1.60
1.28
0.96
0.64

200 kHz

64-QAM
32-QAM
16-QAM
8-QAM
QPSK

160 K

0.96
0.80
0.64
0.48
0.32


Physical Description

The Cisco uBR-MC28U/X card provides two downstream ports and eight upstream ports, organized into two DOCSIS MAC domains. The new card comes in two versions, the Cisco uBR-MC28U and the Cisco uBR-MC28X, which are identical except for the type of upconverter that the downstream ports use:

Cisco UBR-MC28U card (part number UBR-MC28U)—Each downstream port includes an onboard integrated upconverter that generates an RF signal suitable for connection to a combiner and transmission on the coaxial cable network, without the need for any external upconverters. This can save both the money and rack space required by an external upconverter, as well as reduce the complexity of the equipment at the headend site.

Cisco uBR-MC28X card (part number UBR-MC28X)—The downstreams on this card do not include integrated upconverters. Instead, the downstream ports generate an IF signal that must be converted through an external upconverter before transmission on the cable network. This allows the Cisco uBR-MC28X card to easily replace existing line card installations that currently use external upconverters.

Figure 1 shows the front panel of the Cisco uBR-MC28U card, and Figure 2 shows the front panel of the Cisco uBR-MC28X card:

Figure 1 Cisco uBR-MC28U Cable Interface Line Card Front Panel

Figure 2 Cisco uBR-MC28X Cable Interface Line Card Front Panel


Note The downstreams on the Cisco uBR-MC28U card are labelled "DSx-RF" to indicate that they output an RF-wave from the internal upconverter. The downstreams on the Cisco uBR-MC28X card are labelled "DSx-IF" to indicate that they output an IF-wave that requires an external upconverter.


Table 3 shows the association between the downstream ports and their upstream ports on the Cisco uBR-MC28U/X card. Table 3 also shows the interface label to use when referring to the port when using command-line interface (CLI) commands.

Table 3 Interface to Port Mapping 

Port Set
Physical Ports
CLI Cable Interface Label 1

Domain #0

DS0 RF (Cisco uBR-MC28U)
DS0 (Cisco uBR-MC28X)

CX/0

US0

CX/0 U0

US1

CX/0 U1

US2

CX/0 U2

US3

CX/0 U3

Domain #1

DS1 RF (Cisco uBR-MC28U)
DS1 (Cisco uBR-MC28X)

CX/1

US4

CX/1 U0

US5

CX/1 U1

US6

CX/1 U2

US7

CX/1 U3

1 The X in the CLI Cable Interface Label column refer to the physical card slot in which the card is installed. The value for X can range from 3 to 6.



Note The Cisco uBR-MC28U/X cable interface line card also contains two internal Ethernet interfaces that are used to transmit interprocess communications (IPC) messages between the line card and the router's processor card. These interfaces cannot be configured but do appear in some command-line interface (CLI) displays, such as the show ip route and show arp command.


DOCSIS 2.0 A-TDMA Support

The Cisco uBR-MC28U/X card improves the maximum upstream bandwidth on existing DOCSIS 1.0 and DOCSIS 1.1 cable networks by providing a number of advanced PHY capabilities that have been specified by the new DOCSIS 2.0 specifications. This feature incorporates the following advantages and improvements of DOCSIS 2.0 and EuroDOCSIS 2.0 networks:

Builds on existing DOCSIS cable networks by providing full compatibility with existing DOCSIS 1.0 and DOCSIS 1.1 cable modems. (The registration response (REG-RSP) message contains the DOCSIS version number to identify each cable modem's capabilities.)

Upstreams can be configured for three different modes to support different mixes of cable modems:

An upstream can be configured for TDMA mode to support only DOCSIS 1.0 and DOCSIS 1.1 cable modems.

An upstream can be configured for A-TDMA mode to support only DOCSIS 2.0 cable modems.

An upstream can be configured for a mixed, TDMA/A-TDMA mode, to support both DOCSIS 1.0/DOCSIS 1.1 and DOCSIS 2.0 cable modems on the same upstream.


Note DOCSIS 2.0 A-TDMA cable modems will not register on a TDMA upstream if an A-TDMA or mixed upstream exists in the same MAC domain, unless the CMTS explicitly switches the cable modem to another upstream using an Upstream Channel Change (UCC) message. DOCSIS 1.0 and DOCSIS 1.1 cable modems cannot register on an A-TDMA only upstream.


A-TDMA mode defines new interval usage codes (IUC) of A-TDMA short data grants, long data grants, and Unsolicited Grant Service (UGS) grants (IUC 9, 10, and 11) to supplement the existing DOCSIS 1.1 IUC types

Increases the maximum channel capacity for A-TDMA upstreams to 30 Mbps per 6 MHz channel.

A-TDMA and mixed modes of operation provide higher bandwidth on the upstream using new 32-QAM and 64-QAM modulation profiles, while retaining support for existing 16-QAM and QPSK modulation profiles. In addition, an 8-QAM modulation profile is supported.

Supports a minislot size of 1 tick for A-TDMA operations.

Increases channel widths to 6.4 MHz (5.12 Msymbol rate).

A-TDMA and mixed modes of operation provide a more robust operating environment with increased protection against ingress noise and other signal impairments, using a number of new features:

Uses to a symbol (T)-spaced adaptive equalizer structure to increase the equalizer tap size to 24 taps, compared to 8 taps in DOCSIS 1.x mode. This allows operation in the presence of more severe multipath and microreflections, and can accommodate operation near band edges where group delay could be a problem.

Supports new QPSK0 and QPSK1 preambles, which provide improved burst acquisition by performing simultaneous acquisition of carrier and timing lock, power estimates, equalizer training and constellation phase lock. This allows shorter preambles, reducing implementation loss.

Increases the forward error correction (FEC) T-byte size to 16 bytes per Reed Solomon block (T=16) with programmable interleaving.

To simplify the administration of A-TDMA and mixed TDMA/A-TDMA modulation profiles, the Cisco uBR-MC28U/X card provides a number of preconfigured modulation profiles. Each mode of operation also defines a default modulation profile that is automatically used when a profile is not specifically assigned to an upstream.


Note Cisco IOS Release 12.2(15)CX does not support the Synchronous Code Division Multiple Access (S-CDMA) modulation technique that is also specified in the DOCSIS 2.0 specification.


Upgrading from a Cisco uBR-MC28C Card

If you replace a Cisco uBR-MC28C cable interface line card with a Cisco uBR-MC28U/X card, the Cisco uBR7246VXR router erases the previous interface configuration because the old and new cards are different cards with different capabilities. For this reason, you should consider this change to be an upgrade, as opposed to a simple replacement of cards.

If you want to preserve the existing card's configuration, you must first save it to a text file (either by capturing it to your terminal program's capture buffer or by copying it to a TFTP server), and then edit the configuration as desired. At the very least, you must make the following changes to the previous configuration to allow it to be used with the Cisco uBR-MC28U/X card:

Because the downstreams on the Cisco uBR-MC28U card are using integrated upconverters, you MUST configure and enable the upconverters on each downstream, using the cable downstream rf-power and no cable downstream rf-shutdown commands. (You do not need to use these commands on the Cisco uBR-MC28X card.)

Existing modulation profiles can continue to be used on the Cisco uBR-MC28U/X card, but if you want to use the advanced modulation profiles available on the card (robust profiles, mixed mode, or ATDMA mode), you must create new modulation profiles and assign them to the card.

Upstreams default to the DOCSIS 1.0/1.1 TDMA-only mode. To use the mixed or ATDMA modes, you must use the cable upstream docsis-mode command to configure the upstream for the new mode.

To EuroDOCSIS channels on the card,first enter the cable freq-range european command in global configuration mode to enable EuroDOCSIS operations on the Cisco CMTS chassis. Then enable Annex A on all of the downstreams that is used for EuroDOCSIS operations, using the cable downstream annex a command in interface configuration mode. For example:

Router(config)# cable freq-range european 
Router(config)# interface cable 6/0 
Router(config-if)# cable downstream annex a 
Router(config-if)# interface cable 6/1 
Router(config-if)# cable downstream annex a 
Router(config-if)# 
 
   

You can optionally configure each upstream for the following options:

To specify a range of allowable channel widths, use the cable upstream channel-width command.

To change the ingress noise cancellation value, use the cable upstream ingress-noise-cancellation command.

In addition, if you are using the card in the DOCSIS 1.0/1.1 TDMA-only mode, you can optionally configure the card's advanced hardware spectrum management capabilities.

For information on the new configuration procedures, see the "How to Configure the Cisco uBR-MC28U/X Card" section.

Other Differences with the Cisco uBR-MC28C Card

In addition to the differences listed in the previous section, Upgrading from a Cisco uBR-MC28C Card, the Cisco uBR-MC28U/X card has the following differences with the Cisco uBR-MC28C cable interface line card:

The Cisco uBR-MC28C card operates only in the DOCSIS 1.0/1.1 TDMA mode, using cable modulation profiles in the range of 1 to 10. The Cisco uBR-MC28U/X uses the following modulation profile numbers, depending on the mode of operation:

In DOCSIS 1.X TDMA-only mode, uses modulation profiles 41 to 50.

In DOCSIS 1.X/DOCSIS 2.0 TDMA/A-TDMA mixed mode, uses modulation profiles 141 to 150.

In DOCSIS 2.0 A-TDMA-only mode, uses modulation profiles 241 to 250.

The default modulation profile for the Cisco uBR-MC28C cards is profile 1. The default for the Cisco uBR-MC28U/X cards is 41 (DOCSIS 1.X TDMA-only mode), 141 (DOCSIS 1.X/2.0 mixed mode), and 241 (DOCSIS 2.0 A-TDMA-only mode).

The show cable flap-list command on the Cisco uBR-MC28C card sorts the flap-list by the user-specified option. On the Cisco uBR-MC28U/X card, the show cable flap-list command sorts the flap list first by the cable interface card slot, and then by the user-specified option.

Because the Cisco uBR-MC28U/X card uses a distributed architecture, the NPE processor periodically polls the processor that is onboard the Cisco uBR-MC28U/X card to obtain the packet counters for the cable interface. This polling is done approximately every 5 seconds, so SNMP applications should not poll the Cisco uBR7246VXR router more frequently than every five seconds, because the counters could otherwise appear to be inaccurate or random.

Benefits

The Cisco uBR-MC28U/X card provides the following benefits to cable service providers and their partners and customers. Unless otherwise noted, all features apply to both the Cisco uBR-MC28U and Cisco uBR-MC28X card:

Provides improved RF performance over current cable interface line cards.

Cable operators can efficiently deploy tiered services while effectively managing peer-to-peer traffic, allowing the CMTS to deliver highly competitive service bundles to both the consumer and business marketplaces.

Full compatibility with DOCSIS 1.X and EuroDOCSIS 1.X cable modems (CMs) and cable modem termination systems (CMTS).

Additional channel capacity in the form of more digital bits of throughput capacity in the upstream path.

Increased protection against electronic impairments that occur in cable systems, allowing for a more robust operating environment.

(Cisco uBR-MC28U Only) Includes integrated upconverters for each downstream port, removing the requirement for an external upconverter.

Provides hardware-based support for DOCSIS 1.1 features such as concatenation, fragmentation, and payload headers suppression (PHS).

Provides hardware-based spectrum management features.

Gives cable operators additional flexibility in partitioning the cable plant to address growing subscriber bandwidth demands; enables cost-effective scalability of services and subscribers.

Supports most earlier Cisco cable interface line card features including online insertion and removal (OIR), allowing key system components to be added or removed without powering off the chassis.

Interoperates with DOCSIS-compliant cable modems and other RF customer premises equipment (CPE) devices.

How to Configure the Cisco uBR-MC28U/X Card

This section describes the following tasks that are required to configure the Cisco uBR-MC28U/X cable interface line card:

Creating Modulation Profiles

Configuring and Enabling the Downstream Ports

Configuring and Enabling the Upstream Ports

Shutting Down a Downstream Port

Configuring Spectrum Management on the Cisco uBR-MC28U/X Card


Note The Cisco uBR7246VXR router should be operational before beginning the following procedures to configure the Cisco uBR10-MC28U/X cable interface line card.



Tip You can use the following procedures for both DOCSIS and EuroDOCSIS configurations. The only differences with the EuroDOCSIS configurations is that the downstream must be configured for Annex A framing and that the EuroDOCSIS upstreams support a wider frequency range.


Configuring the Scheduler Allocate Values

To ensure that the processor on the Cisco uBR7246VXR router has sufficient processor time to handle the communication with the Cisco uBR-MC28U/X card, you must ensure that the router is configured for the default scheduler allocate values, using the scheduler allocate 4000 400 command in global configuration mode. For example:

Router# configure terminal 
Router(config)# scheduler allocate 4000 400 
Router(config)# 
 
   

If the router is not configured for these values, the processor could not have sufficient time to process the various requests from the processor that is onboard the Cisco uBR-MC28U/X card, which could result in the card being reset durings periods of heavy use.


Tip The scheduler allocate 4000 400 command configures the router so that it spends a maximum of 4,000 microseconds on fast switching within an individual network interrupt context. This command also configures the router so that it spends a minimum of 400 microseconds at the process level when network interrupts are disabled.


Creating Modulation Profiles

This section describes how to create modulation profiles for the different modes of DOCSIS operations, using the preconfigured modulation profile options.

Creating a TDMA Modulation Profile

Creating a Mixed Mode Modulation Profile

Creating an A-TDMA Modulation Profile

Creating a TDMA Modulation Profile

This section describes how to create a modulation profile for the DOCSIS 1.0/DOCSIS 1.1 TDMA mode of operation, using one of the preconfigured modulation profiles.

SUMMARY STEPS

1. enable

2. configure terminal

3. cable modulation-profile profile {mix | qam-16 | qpsk | robust-mix}

4. exit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Router#

Enables privileged EXEC mode. Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Router(config)#

Enters global configuration mode.

Step 3 

cable modulation-profile profile {mix | qam-16 | qpsk | robust-mix}

Example:

Router(config)# cable modulation-profile 3 mix

Router(config)# cable modulation-profile 4 qpsk

Creates a preconfigured modulation profile, where the burst parameters are set to their default values for each burst type:

profile = Specifies the modulation profile number. For the DOCSIS 1.0/DOCSIS 1.1 TDMA mode on the Cisco uBR-MC28U/X, the valid range is 41 to 50. The system creates profile 41 as a default TDMA-only modulation profile.

The following preconfigured profiles are available:

mix = Default QPSK/16-QAM profile.

qam-16 = Default 16-QAM profile.

qpsk = Default QPSK profile.

robust-mix = Default QPSK/16-QAM profile that is more robust and more able to deal with noise than the mix profile.

 

Note You can also create custom modulation profiles with the cable modulation-profile command by configuring the values for the individual burst parameters. These parameters, however, should not be modified unless you are thoroughly familiar with how changing each parameter affects the DOCSIS MAC layer. Cisco recommends using the preconfigured default modulation profiles for most cable plants.

Step 4 

exit

Example:

Router(config)# exit

Router#

Exits global configuration mode.

Creating a Mixed Mode Modulation Profile

This section describes how to create a modulation profile for the mixed TDMA/A-TDMA mode of operation, using one of the preconfigured modulation profiles.

SUMMARY STEPS

1. enable

2. configure terminal

3. cable modulation-profile profile {mix-high | mix-low | mix-mid | mix-qam | qam-16 | qpsk | robust-mix-high | robust-mix-mid | robust-mix-qam}

4. exit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Router#

Enables privileged EXEC mode. Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Router(config)#

Enters global configuration mode.

Step 3 

cable modulation-profile profile
{mix-high | mix-low | mix-mid | mix-qam | qam-16 | qpsk | robust-mix-high | robust-mix-mid | robust-mix-qam}

Example:

Router(config)# cable modulation-profile 143 mix-medium

Router(config)# cable modulation-profile 144 mix-high

Creates a preconfigured modulation profile, where the burst parameters are set to their default values for each burst type:

profile = Specifies the modulation profile number. For the DOCSIS 1.x and DOCSIS 2.0 mixed mode on the Cisco uBR-MC28U/X, the valid range is 141 to 150. The system creates profile 141 as a default mixed mode modulation profile.

The following preconfigured profiles are available:

mix-high and robust-mix-high = Default QPSK/64-QAM profile.

mix-low = Default QPSK/16-QAM profile.

mix-mid and robust-mix-mid = Default QPSK/32-QAM profile.

mix-qam and robust-mix-qam = Default 16-QAM/64-QAM profile.

qam-16 = Default 16-QAM modulation profile.

qpsk = Default QPSK modulation profile.

Note The robust-mix profiles are similar to but more robust than the mix profiles, so that they more able to detail with noise on the upstream.

 

Note You can also create custom modulation profiles with the cable modulation-profile command by configuring the values for the individual burst parameters. These parameters, however, should not be modified unless you are thoroughly familiar with how changing each parameter affects the DOCSIS MAC layer. Cisco recommends using the preconfigured default modulation profiles for most cable plants.

Step 4 

exit

Example:

Router(config)# exit

Router#

Exits global configuration mode.

Creating an A-TDMA Modulation Profile

This section describes how to create a modulation profile for the DOCSIS 2.0 A-TDMA mode of operation, using one of the preconfigured modulation profiles.

SUMMARY STEPS

1. enable

2. configure terminal

3. cable modulation-profile profile {mix-high | mix-low | mix-mid | mix-qam | qam-8 | qam-16 | qam-32 | qam-64 | qpsk | robust-mix-high | robust-mix-low | robust-mix-mid}

4. exit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Router#

Enables privileged EXEC mode. Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Router(config)#

Enters global configuration mode.

Step 3 

cable modulation-profile profile {mix-high | mix-low | mix-mid | mix-qam | qam-8 | qam-16 | qam-32 | qam-64 | qpsk | robust-mix-high | robust-mix-low | robust-mix-mid}

Example:

Router(config)# cable modulation-profile 242 qam-32

Router(config)# cable modulation-profile 243 qam-64

Creates a preconfigured modulation profile, where the burst parameters are set to their default values for each burst type:

profile = Specifies the modulation profile number. For the DOCSIS 2.0 A-TDMA only mode on the Cisco uBR-MC28U/X, the valid range is 241 to 250. The system creates profile 241 as a default DOCSIS 2.0 A-TDMA profile for the Cisco uBR-MC28U/X.

The following preconfigured profiles are available:

mix-high and robust-mix-high = Default QPSK/64-QAM profile.

mix-low and robust-mix-low = Default QPSK/16-QAM profile.

mix-mid and robust-mix-mid = Default QPSK/32-QAM profile.

mix-qam = Default 16-QAM/64-QAM profile.

qam-8 = Default 8-QAM profile.

qam-16 = Default 16-QAM profile.

qam-32 = Default 32-QAM profile.

qam-64 = Default 64-QAM profile.

qpsk = Default QPSK modulation profile.

Note The robust-mix profiles are similar to but more robust than the mix profiles, so that they more able to detail with noise on the upstream.

 

Note You can also create custom modulation profiles with the cable modulation-profile command by configuring the values for the individual burst parameters. These parameters, however, should not be modified unless you are thoroughly familiar with how changing each parameter affects the DOCSIS MAC layer. Cisco recommends using the preconfigured default modulation profiles for most cable plants.

Step 4 

exit

Example:

Router(config)# exit

Router#

Exits global configuration mode.

Configuring and Enabling the Downstream Ports

This section describes how to configure and enable the downstream ports on the Cisco uBR-MC28U or Cisco uBR-MC28X card. Unless otherwise noted, all tasks apply to both versions of the card.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface cable x/y

4. cable downstream annex {A | B}

5. cable downstream modulation {64qam | 256qam}

6. cable downstream interleave-depth {8 | 16 | 32 | 64 | 128}

7. cable downstream frequency down-freq-hz

8. cable downstream channel-id id

9. cable downstream description string

10. cable downstream rf-power power-level

11. no cable downstream rf-shutdown

12. no shutdown

13. exit

14. exit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Router#

Enables privileged EXEC mode. Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Router(config)#

Enters global configuration mode.

Step 3 

interface cable x/y

Example:

Router(config)# interface cable 5/0

Router(config-if)#

Enters interface configuration mode for the specified cable interface (MAC domain).

x = card slot number (can range from 3 to 6)

y = downstream number (can be either 0 or 1)

Step 4 

cable downstream annex {A | B}

Example:

Router(config-if)# cable downstream annex B

Router(config-if)#

(Optional) Configures the downstream for the Motion Picture Experts Group (MPEG) framing format:

A = Configures the downstream for Annex A (EuroDOCSIS J.112) channel plan framing.

B = Configures the downstream for Annex B (DOCSIS ITU J.83) channel plan framing (default).

Step 5 

cable downstream modulation {64qam | 256qam} 
Example:

Router(config-if)# cable downstream modulation 256qam

Router(config-if#)

(Optional) Sets the downstream modulation rate:

64qam = Modulation rate is 6 bits per downstream symbol (default).

256qam = Modulation rate is 8 bits per downstream symbol.

Step 6 

cable downstream interleave-depth {8 | 16 | 32 
| 64 | 128} 
Example:

Router(config-if)# cable downstream interleave-depth 64

Router(config-if#)

(Optional) Sets the downstream interleave depth, in number of rows of codewords. The default is 32.

Step 7 

cable downstream frequency down-freq-hz 
Example:

Router(config-if)# cable downstream frequency 669000000

Router(config-if)#

(Cisco uBR-MC28U only) Sets the fixed center frequency for the integrated upconverter for this domain's downstream RF carrier in Hz. The value for down-freq-hz should be the center frequency of the 6-MHz downstream RF carrier channel for that downstream port.

Note The digital carrier frequency is not the same as the video carrier frequency.

Step 8 

cable downstream channel-id id 
Example:

Router(config-if)# cable downstream channel-id 12

Router(config-if)#

(Optional) Sets the downstream channel ID. The valid range for id is 1 to 254, with the default being the unique unit number that is assigned by the CMTS.

Step 9 

cable downstream description string 
Example:

Router(config-if)# cable downstream description "Downstream 0 for Node 12"

Router(config-if)#

(Optional) Adds a description for this downstream to the router's configuration, to aide in management and troubleshooting. The string can be any arbitrary string that contains this downstream's purpose, node, or any other information.

Step 10 

cable downstream rf-power power-level 
Example:

Router(config-if)# cable downstream rf-power 60

Router(config-if)#

(Cisco uBR-MC28U only) Sets the RF power output level, in dBmV, on the integrated upconverter. The power-level can range from 45 to 63 dBmV, with a default of 58 dBmV for the Cisco uBR-MC28U cable interface line card.

Step 11 

no cable downstream rf-shutdown 
Example:

Router(config-if)# no cable downstream rf-shutdown

Router(config-if)#

(Cisco uBR-MC28U only) Enables the integrated upconverter for the downstream.

Step 12 

no shutdown 
Example:

Router(config-if)# no shutdown

Router(config-if)#

Activates the downstream port on a cable modem card for digital data transmission over the cable plant.

 

Note Repeat Step 3 through Step 12 for each downstream port.

Step 13 

exit

Example:

Router(config-if)# exit

Router(config)#

Exits interface configuration mode.

Step 14 

exit

Example:

Router(config)# exit

Router#

Exits global configuration mode.

Configuring and Enabling the Upstream Ports

This section describes how to configure and enable the upstream ports on the Cisco uBR-MC28U or Cisco uBR-MC28X card. All tasks apply to both versions of the card.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface cable x/y

4. cable upstream port frequency up-freq-hz
or
cable upstream port spectrum-group group-number

5. cable upstream port power-level dbmv

6. cable upstream port channel-width first-choice-width [last-choice-width]

7. cable upstream port minislot-size size

8. cable upstream port docsis-mode {atdma | tdma | tdma-atdma}

9. cable upstream port modulation-profile profile [profile2]

10. cable upstream n ingress-noise-cancellation interval

11. no cable upstream port shutdown

12. exit

13. exit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Router#

Enables privileged EXEC mode. Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Router(config)#

Enters global configuration mode.

Step 3 

interface cable x/y

Example:

Router(config)# interface cable 5/0

Router(config-if)#

Enters interface configuration mode for the specified cable interface (MAC domain).

x = card slot number (can range from 3 to 6)

y = downstream number (can be either 0 or 1)

Step 4 

cable upstream port frequency up-freq-hz 
Example:

Router(config-if)# cable upstream 0 frequency 10000000

Router(config-if)#

Sets the center frequency for the upstream in Hz. The valid range for port is 0 to 3.

 

or

 
cable upstream port spectrum-group group-number 
Example:

Router(config-if)# cable upstream 0 spectrum-group 1

Router(config-if)#

Assigns the upstream to a spectrum group that defines the valid range of upstream frequencies. The valid range for port is 0 to 3. The valid range for group-number is 1 to 32, with no default.

 

Note You must configure each upstream with either a fixed center frequency or assign it to a spectrum group.

Step 5 

cable upstream port power-level dbmv 
Example:

Router(config-if)# cable upstream 0 power-level 20

Router(config-if)#

(Optional) Sets the input power level for the upstream in dBmV. The valid range for port is 0 to 3. The valid range for dbmv is -10 to +25 dBmV, with a default of 0.

Step 6 

cable upstream port channel-width first-choice-width [last-choice-width]

Example:

Router(config-if)# cable upstream 0 channel-width 800000

Router(config-if)# cable upstream 1 channel-width 1600000 3200000

(Optional) Specifies the allowable upstream channel widths for the upstream port.

port = Number for the upstream port. The valid range is 0 to 3.

first-choice-width = Upstream channel width in hertz (Hz). Valid values are: 200,000 (160,000 symbols/sec), 400,000 (320,000 symbols/sec), 800,000 (640,000 symbols/sec), 1600,000 (1,280,000 symbols/sec), and 3,200,000 (2,560,000 symbols/sec).

last-choice-width = (Optional) Upstream channel width in hertz. The valid values are the same as those for the first-choice-width parameter. The symbol rate automatically steps up from the first-choice-width value to the highest value until a stable channel is established.

Step 7 

cable upstream port minislot-size size

Example:

Router(config-if)# cable upstream port minislot-size 8

Router(config-if)#

(Optional) Specifies the minislot size in time ticks.

port = Number for the upstream port. The valid range is 0 to 3.

size = Minislot size. Valid values are 2 (32 symbols), 4 (64 symbols), 8 (128 symbols), 16 (256 symbols), 32 (512 symbols), 64 (1024 symbols), and 128 (2048 symbols).

Step 8 

cable upstream port docsis-mode {atdma | tdma | tdma-atdma}

Example:

Router(config-if)# cable upstream 0 docsis-mode atdma

Router(config-if)# cable upstream 1 docsis-mode tdma-atdma

Router(config-if)#

Configures the upstream for the desired DOCSIS mode of operation:

port = Specifies the upstream port. The valid range is 0 to 3.

atdma = Configures the upstream for DOCSIS 2.0 A-TDMA modulation profiles only.

tdma = Configures the upstream for DOCSIS 1.X TDMA modulation profiles only (default).

tdma-atdma = Configures the upstream for both A-TDMA and TDMA operation (mixed mode).

Step 9 

cable upstream port modulation-profile profile [profile2]

Example:
Router(config-if)# cable upstream 0 
modulation-profile 241 
Router(config-if)# cable upstream 1 
modulation-profile 131 

Assigns the particular modulation profile to this upstream.

port = Specifies the upstream port. The valid range is 0 to 3.

profile = Specifies the modulation profile to be used on this upstream. The valid range for the profile parameter depends on the current DOCSIS mode:

If the upstream is configured for DOCSIS 1.0 and DOCSIS 1.1 mode, the valid range is 41 to 50 on the Cisco uBR-MC28U/X.

If the upstream is configured for DOCSIS 1.x and DOCSIS 2.0 mixed mode, the valid range is 141 to 150 on the Cisco uBR-MC28U/X.

If the upstream is configured for DOCSIS 2.0 A-TDMA mode, the valid range is 241 to 250 on the Cisco uBR-MC28U/X.

profile2 = (Optional) Specifies the number of a secondary modulation profile that the interface uses when noise on the upstream increases to the point that the primary modulation profile can no longer be used. (The secondary profile should specify a more robust profile, in terms of coping with noise, than the primary profile.)

Note The type of modulation profiles must match the DOCSIS mode configured for the upstream, using the cable upstream docsis-mode command.

Step 10 

cable upstream n ingress-noise-cancellation 
interval 
Example:

Router(config-if)# cable upstream 0 ingress-noise-cancellation 400

Router(config-if)#

(Optional) Configures how often, in milliseconds, a line card should sample the signal on an upstream to correct any ingress noise that has appeared on that upstream. The valid range for interval is 10 to 3000 milliseconds, with a default value of 200 milliseconds.

Step 11 

no cable upstream port shutdown 
Example:

Router(config-if)# no cable upstream 0 shutdown

Router(config-if)#

Activates the RF carrier on the upstream port. Each upstream port must be activated to enable upstream data from the cable modems on your network to the Cisco uBR7246VXR router. The valid range for port is 0 to 3.

 

Note Repeat Step 4 through Step 11 for each upstream port, changing the port parameter from 0 through 3.

Step 12 

exit

Example:

Router(config-if)# exit

Router(config)#

Exits interface configuration mode.

Step 13 

exit

Example:

Router(config)# exit

Router#

Exits global configuration mode.

Shutting Down a Downstream Port

This section describes how to shut down the downstream port on a cable interface, which should be done when permanently removing a Cisco uBR-MC28U/X card from the Cisco uBR7246VXR chassis. When you shut down an interface, it is designated administratively down in the show command displays.


Tip You do not need to shut down an interface when you are replacing the cable interface line card using online insertion and removal (OIR).


SUMMARY STEPS

1. enable

2. configure terminal

3. interface cable x/y

4. shutdown

5. cable downstream rf-shutdown

6. exit

7. exit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Router#

Enables privileged EXEC mode. Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Router(config)#

Enters global configuration mode.

Step 3 

interface cable x/y

Example:

Router(config)# interface cable 5/0

Router(config-if)#

Enters interface configuration mode for the specified cable interface (MAC domain).

x = card slot number (can range from 3 to 6)

y = downstream number (can be either 0 or 1)

Step 4 

shutdown

Example:

Router(config-if)# shutdown

Router(config-if)#

Shuts down the cable interface line card.

Step 5 

cable downstream rf-shutdown

Example:

Router(config-if)# cable downstream rf-shutdown

Router(config-if)#

(Cisco uBR-MC28U only) Shuts down the integrated upconverter for the downstream.

 

Repeat Step 3 through Step 5 for each downstream.

Step 6 

exit

Example:

Router(config-if)# exit

Router(config)#

Exits interface configuration mode.

Step 7 

exit

Example:

Router(config)# exit

Router#

Exits global configuration mode.

Configuring Spectrum Management on the Cisco uBR-MC28U/X Card

To configure the Cisco uBR-MC28U/X card's advanced hardware-based spectrum management features, see the chapter Spectrum Management for the Cisco CMTS in the Cisco CMTS Feature Guide. See the "Additional References" section for more information.


Note Spectrum management is not supported for DOCSIS 2.0 mixed-mode and A-TDMA upstreams. Advanced spectrum management features (such as guided frequency hopping, dynamic upstream modulation, and proactive CNR-based frequency hopping and channel width changes) can be configured only on DOCSIS 1.X and EuroDOCSIS 1.X upstreams (modulation profiles 41-50). You cannot use these features on channels configured for mixed mode or DOCSIS 2.0 or EuroDOCSIS 2.0 A-TDMA mode (modulation profiles 141-150 and 241-250, respectively). Advanced hardware-based spectrum management for A-TDMA operations is scheduled to be supported in a future release of the Cisco IOS software.


Monitoring the Cisco uBR-MC28U/X Cable Interface Line Card

The following sections describe the major show commands that provide information about the Cisco uBR-MC28U/X cable interface line card:

Verifying a Downstream Port and Integrated Upconverter

Verifying Downstream Center Frequency

Verifying the Upstream Port

Displaying Cable Modulation Profiles

Displaying Cable Modem Capabilities and Provisioning

Verifying a Downstream Port and Integrated Upconverter

To display the status of a downstream port and its integrated upconverter, use the show controllers command. The following example shows a typical display for the Cisco uBR-MC28U card that shows that the upconverter is enabled and configured for a frequency of 453 MHz and RF power of 55.1 dBmv.


Note The display for the Cisco uBR-MC28X card is similar, except that the card is identified as "Hardware is MC28X (F-connector)".


Router# show controllers c5/0 
 
   
Interface Cable5/0
Hardware is MC28U(F-connector) with Integrated Up-converter
JIB version 60
 Cable5/0 Upconverter is Enabled Output is Enabled
  Model: 74-2094-02 Serial Number: 0WAV05530001 CLEI Code: EAIFBB0BAA
  HW Rev:    PC2D0108 SW Rev: 007, NVRAM Rev: 006 ECI number 289389
  Downstream Frequency 453.0000 MHz
  RF Power 55.1 dBmv
 
   
idb 0x60E18D30 MAC regs 0x20000000 SDRAM 0x28000000
 mac ring entries 32 bandwidth ring entries 128 tx ring entries 128 MAP tx ring entries 
128
 MAC ring 0xF24F2A0 shadow 0x60E7A538 head 18 count 203634 full 0
 Bandwidth ring 0xF24F360 shadow 0x60E7A628 head 117 count 21237 full 0
 PCI low priority ring 0xF24F5A0 shadow 0x60E7A898 head 0 count 0 full 0
 High priority Tx ring 0xF24EE60 shadow 0x60E7A0C8 head 112 tail 114 count 1161886450 full 
0
 Low priority Tx ring 0xF24EA20 shadow 0x60E79C58 head 126 tail 0 count 99648 full 0
 Timestamp is from local oscillator
 throttled 0 enabled 0 disabled 0
 Rx: spurious 0 framing_err 0 hcs_err 0 no_buffer 0 short_pkt 0
     no_enqueue 0 no_enp 0 miss_count 0 latency 0
     invalid_sid 0 invalid_mac 0 bad_ext_hdr_pdu 0 concat 0 bad-concat 0
 Tx:  full 0 drop 0 stuck 0 latency 0
 MTx: full 0 drop 0 stuck 0 latency 0
 Slots 0 NoUWCollNoEngy 0 FECorHCS 2 HCS 0
 Req 0 ReqColl 0 ReqNoise 0 ReqNoEnergy 0
 ReqData 0 ReqDataColl 0 ReqDataNoise 0 ReqDataNoEnergy 0
 Rng 0 RngColl 0 RngNoise 0
 FECBlks 0 UnCorFECBlks 0 CorFECBlks 0
 MAP FIFO overflow 0, Rx FIFO overflow 0, No rx buf 0
 DS FIFO overflow 0, US FIFO overflow 0, US stuck 0
 Bandwidth Requests= 0x1DC0
 Piggyback Requests= 0x18A9
 Ranging Requests= 0x18530
 Timing Offset = 0x0
 Bad bandwidth Requests= 0x0
 Bad REG_ACK= 0x0
 No MAP buffer= 0x0
 No REG_RESP buffer= 0x0
 Cable5/0 Downstream is up
  Frequency 453.0000 MHz, Channel Width 6 MHz, 64-QAM, Symbol Rate 5.056941 Msps
  FEC ITU-T J.83 Annex B, R/S Interleave I=32, J=4
  Downstream channel ID: 0
  Dynamic Services Stats:
  DSA: 0  REQs  0 RSPs  0 ACKs
  0 Successful DSAs  0 DSA Failures
  DSC: 0  REQs  0 RSPs  0 ACKs
  0 Successful DSCs  0 DSC Failures
  DSD:  0 REQs  0 RSPs
  0 Successful DSDs  0 DSD Failures
  DCC: 0  REQs  0 RSPs  0 ACKs
  0 Successful DCCs  0 DCC Failures
 
   
Router# 

Verifying Downstream Center Frequency

To verify the downstream center frequency of each domain, enter the show controllers cable downstream command:

Router# show controllers cable 4/0 downstream 
 
   
Cable4/0 Downstream is up
  Frequency 576.0000MHz, Channel Width 6MHz, 64-QAM, Symbol Rate
  5.056941 Msps
  FEC ITU-T J.83 Annex B, R/S Interleave I=32, J=4
  Downstream channel ID: 0
 
   
Router# 

Verifying the Upstream Port

To verify the current configuration of an upstream port, use the show controllers cable command for the desired upstream port. The following example shows a typical display that shows that the upstream is configured for a frequency of 6.0 Mhz, with a channel width of 1.6 MHz and 16-QAM modulation.

Router# show controllers cable5/0 upstream 0
 
   
Cable5/0 Upstream 0 is up
  Frequency 6.000 MHz, Channel Width 1.600 MHz, 16-QAM Symbol Rate 1.280 Msps
  Spectrum Group is overridden
  SNR - Unknown - no modems online.
  Nominal Input Power Level 0 dBmV, Tx Timing Offset 0
  Ranging Backoff automatic (Start 0, End 3)
  Ranging Insertion Interval automatic (60 ms)
  Tx Backoff Start 0, Tx Backoff End 4
  Modulation Profile Group 1
  Concatenation is enabled
  Fragmentation is enabled
  part_id=0x0952, rev_id=0x00, rev2_id=0x00
  nb_agc_thr=0x0000, nb_agc_nom=0x0000
  Range Load Reg Size=0x58
  Request Load Reg Size=0x0E
  Minislot Size in number of Timebase Ticks is = 8
  Minislot Size in Symbols = 64
  Bandwidth Requests = 0x0
  Piggyback Requests = 0x0
  Invalid BW Requests= 0x0
  Minislots Requested= 0x0
  Minislots Granted  = 0x0
  Minislot Size in Bytes = 32
  Map Advance (Dynamic) : 2180 usecs
  UCD Count = 54528
 
   
Router# 

Note The upstream frequency displayed by the show controllers cable command output might not exactly match the frequency configured with the cable upstream frequency command, because Cisco cable interface line cards use frequencies in 16 KHz increments. For example, if you specify a frequency of 27 MHz, the upstream is programmed for a center frequency of 27.008 MHz, which is the next highest 16-KHz boundary.


Displaying Cable Modulation Profiles

To display the modulation profiles that are currently defined on the CMTS, use the show cable modulation-profile command without any options:

Router# show cable modulation-profile 
 
   
Mod IUC     Type  Preamb Diff FEC    FEC   Scrambl Max  Guard Last Scrambl Preamb
                  length enco T      k     seed    B    time  CW           offset
                              BYTES  BYTES         size size  short
1   request qpsk  64     no   0x0    0x10  0x152   0    8     no   yes     0 
1   initial qpsk  128    no   0x5    0x22  0x152   0    48    no   yes     0 
1   station qpsk  128    no   0x5    0x22  0x152   0    48    no   yes     0 
1   short   qpsk  72     no   0x5    0x4B  0x152   6    8     yes  yes     0 
1   long    qpsk  80     no   0x8    0xDC  0x152   0    8     yes  yes     0 
141 request qpsk  64     no   0x0    0x10  0x152   0    8     no   yes     0 
141 initial qpsk  128    no   0x5    0x22  0x152   0    48    no   yes     0 
141 station qpsk  128    no   0x5    0x22  0x152   0    48    no   yes     0 
141 short   qpsk  72     no   0x5    0x4B  0x152   6    8     yes  yes     0 
141 long    qpsk  80     no   0x8    0xDC  0x152   0    8     yes  yes     0 
141 a-short 64qam 128    no   0x5    0x63  0x152   10   8     yes  yes     0 
141 a-long  64qam 128    no   0xF    0xC8  0x152   0    8     yes  yes     0 
241 request qpsk  64     no   0x0    0x10  0x152   0    8     no   yes     0 
241 initial qpsk  128    no   0x5    0x22  0x152   0    48    no   yes     0 
241 station qpsk  128    no   0x5    0x22  0x152   0    48    no   yes     0 
241 a-short 64qam 128    no   0x5    0x63  0x152   10   8     yes  yes     0 
241 a-long  64qam 128    no   0xF    0xC8  0x152   0    8     yes  yes     0 
241 a-ugs   16qam 80     no   0x3    0xE7  0x152   0    8     yes  yes     0 
 
   
Router# 
 
   

To display a specific modulation profile in detail, specify the profile number with the show cable modulation-profile command:

Router# show cable modulation-profile 242 
 
   
Mod IUC     Type  Pre Diff FEC  FEC  Scrmb Max Guard Last Scrmb Pre   Pre   RS
                  len enco T    k    seed  B   time  CW         offst Type
                           BYTE BYTE       siz size  short
242 request qpsk  68  no   0x0  0x10 0x152 0   8     no   yes   0     qpsk0 no 
242 initial qpsk  2   no   0x0  0x10 0x0   0   0     no   no    0     qpsk1 no 
242 station qpsk  128 no   0x5  0x22 0x152 0   48    no   yes   0     qpsk0 no 
242 a-short 32qam 160 no   0x9  0x4C 0x152 6   8     yes  yes   0     qpsk1 no 
242 a-long  64qam 132 no   0xC  0xE7 0x152 0   8     yes  yes   0     qpsk1 no 
242 a-ugs   16qam 80  no   0x3  0xE7 0x152 0   8     yes  yes   0     qpsk1 no 
 
   
Router# 

Displaying Cable Modem Capabilities and Provisioning

To display the capabilities of the online cable modems and how the modems were provisioned, use the show cable modem mac command:

Router# show cable modem mac 
 
   
MAC Address    MAC         Prim  Ver    Prov    Frag Concat PHS Priv  DS    US
               State       Sid                                        Saids Sids
0007.0e03.69a1 online      2     DOC1.1 DOC1.1  yes  yes    yes BPI+  0     4   
0007.0e03.6a05 online      3     DOC1.1 DOC1.1  yes  yes    yes BPI+  0     4   
0007.0e03.6981 online      4     DOC1.1 DOC1.1  yes  yes    yes BPI+  0     4   
0007.0e03.69e9 online      2     DOC1.1 DOC1.1  yes  yes    yes BPI+  0     4   
0090.963e.d312 online(pt)  4     DOC1.1 DOC1.0  no   yes    yes BPI   8     4   
0008.0e06.7a90 online(pt)  56    DOC1.0 DOC1.0  no   yes    no  BPI   0     0   
0002.8a0e.a392 online(pt)  57    DOC1.0 DOC1.0  no   no     no  BPI   0     0   
0000.39e8.9a4e online(pt)  58    DOC1.0 DOC1.0  no   yes    no  BPI   0     0   
0000.39ac.4e57 online      151   DOC2.0 DOC1.0  no   yes    no  BPI   0     0   
0090.963e.d314 online(pt)  152   DOC1.1 DOC1.0  no   yes    yes BPI   8     4   
0008.0e06.7ab8 online(pt)  153   DOC2.0 DOC1.0  no   yes    no  BPI   0     0   
0007.0e03.6cf5 online(pt)  154   DOC1.0 DOC1.0  no   yes    no  BPI   0     0   
0007.0e03.69f1 online      155   DOC1.1 DOC1.0  no   yes    yes BPI+  0     4   
0007.0e03.6855 online      156   DOC1.1 DOC1.0  no   yes    yes BPI+  0     4   
0007.0e03.6ca1 online      157   DOC1.1 DOC1.0  no   yes    yes BPI+  0     4   
0050.daf8.0296 online(pt)  158   DOC1.0 DOC1.0  no   no     no  BPI   0     0   
0002.8a0e.a38c online(pt)  159   DOC2.0 DOC2.0  no   no     no  BPI   0     0 
Router# 
 
   

To display how many cable modems of each DOCSIS type are online each upstream, use the show cable modem mac summary command:

Router# show cable modem mac summary 
 
   
                             Cable Modem Summary
                             -------------------
                          Mac Version                   Provision Mode
Interface       Total   DOC2.0  DOC1.1  DOC1.0   Reg/Online   DOC 2.0  DOC1.1   DOC1.0
Cable3/0/U1     1       0        1       0        1           0        1        0
Cable3/0/U2     1       0        1       0        1           0        1        0
Cable3/0/U3     1       0        1       0        1           0        1        0
Cable3/1/U0     1       0        1       0        1           0        0        1
Cable3/1/U1     1       0        0       1        1           0        0        1
Cable3/1/U2     3       0        1       2        3           0        1        2
Cable6/0/U1     9       1        5       3        9           1        0        8
Cable6/0/U2     1       0        1       0        1           0        0        1
Cable6/0/U2     2       2        0       0        2           2        0        0
 
   
Router# 

Configuration Examples for Cisco uBR-MC28U/X Card

This section lists sample configurations for the Cisco uBR-MC28U/X cable interface line card.

Modulation Profiles

Cisco uBR-MC28U/X Cable Interface Configurations

Modulation Profiles

This section lists sample configurations for creating the following types of upstream modulation profiles:

Default Modulation Profiles

DOCSIS 1.0/DOCSIS 1.1 TDMA Modulation Profiles

Mixed TDMA/A-TDMA Modulation Profiles

DOCSIS 2.0 A-TDMA Modulation Profiles

Default Modulation Profiles

The following sample configurations show the default modulation profiles that are created on the Cisco CMTS for DOCSIS 1.X, DOCSIS 1.X/2.0 Mixed, and DOCSIS 2.0 ATDMA mode of operation:

! Default DOCSIS 1.X Mixed QPSK/16-QAM Modulation Profile
cable modulation-profile 41 request 0 16 0 8 qpsk scrambler 152 no-diff 68 fixed 
cable modulation-profile 41 initial 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed 
cable modulation-profile 41 station 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed 
cable modulation-profile 41 short 6 76 7 8 16qam scrambler 152 no-diff 160 shortened 
cable modulation-profile 41 long 8 231 0 8 16qam scrambler 152 no-diff 160 shortened 
 
   
! Default DOCSIS 1.X/2.0 Mixed Modulation Profile
cable modulation-profile 141 request 0 16 0 8 qpsk scrambler 152 no-diff 68 fixed  
cable modulation-profile 141 initial 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed 
cable modulation-profile 141 station 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed 
cable modulation-profile 141 short 6 76 7 8 16qam scrambler 152 no-diff 160 shortened 
cable modulation-profile 141 long 8 231 0 8 16qam scrambler 152 no-diff 160 shortened 
cable modulation-profile 141 a-short 9 76 6 8 32qam scrambler 152 no-diff 160 shortened qpsk1 1 2048 
cable modulation-profile 141 a-long 12 231 0 8 64qam scrambler 152 no-diff 132 shortened qpsk1 1 2048  
 
   
! Default DOCSIS 2.0 ATDMA Modulation Profile
cable modulation-profile 241 request 0 16 0 8 qpsk scrambler 152 no-diff 68 fixed qpsk0 1 2048 
cable modulation-profile 241 initial 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed qpsk0 1 2048 
cable modulation-profile 241 station 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed qpsk0 1 2048 
cable modulation-profile 241 a-short 9 76 6 8 32qam scrambler 152 no-diff 160 shortened qpsk1 1 2048 
cable modulation-profile 241 a-long 12 231 0 8 64qam scrambler 152 no-diff 132 shortened qpsk1 1 2048 
cable modulation-profile 241 a-ugs 3 231 0 8 16qam scrambler 152 no-diff 80 shortened qpsk1 1 2048 

DOCSIS 1.0/DOCSIS 1.1 TDMA Modulation Profiles

The following sample configurations show typical modulation profiles for the DOCSIS 1.0/DOCSIS 1.1 TDMA mode of operation. Profiles 42 and 43 use the preconfigured 16-QAM and QPSK modulation profiles. Profile 44 is a typical QPSK/16-QAM mixed modulation profile using some customized burst parameters.

cable modulation-profile 42 qam-16 
cable modulation-profile 43 qpsk 
 
   
cable modulation-profile 44 request 0 16 0 8 qpsk scrambler 152 no-diff 68 fixed 
cable modulation-profile 44 initial 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed 
cable modulation-profile 44 station 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed 
cable modulation-profile 44 short 0 17 0 0 16qam no-scrambler no-diff 44 fixed 
cable modulation-profile 44 long 8 231 0 8 16qam scrambler 152 no-diff 160 shortened 

Mixed TDMA/A-TDMA Modulation Profiles

The following sample configurations show typical modulation profiles for the DOCSIS1.X/DOCSIS 2.0 mixed TDMA/A-TDMA mode of operation. Profiles 143 through 147 use the preconfigured mixed mode modulation profiles. Profile 141 is a typical mixed mode modulation profile some customized burst parameters.

cable modulation-profile 143 mix-high 
cable modulation-profile 144 mix-low 
cable modulation-profile 145 mix-medium 
cable modulation-profile 146 qam-16 
cable modulation-profile 147 qpsk 
 
   
cable modulation-profile 141 request 0 16 0 8 qpsk scrambler 152 no-diff 68 fixed 
cable modulation-profile 141 initial 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed 
cable modulation-profile 141 station 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed 
cable modulation-profile 141 short 6 76 7 8 16qam scrambler 152 no-diff 160 shortened 
cable modulation-profile 141 long 8 231 0 8 16qam scrambler 152 no-diff 160 shortened 
cable modulation-profile 141 a-short 9 76 6 8 32qam scrambler 152 no-diff 160 shortened qpsk1 1 2048 
cable modulation-profile 141 a-long 12 231 0 8 64qam scrambler 152 no-diff 132 shortened qpsk1 1 2048 

DOCSIS 2.0 A-TDMA Modulation Profiles

The following sample configurations show typical modulation profiles for the DOCSIS 1.X/DOCSIS 2.0 mixed TDMA/A-TDMA mode of operation. Profiles 242 through 246 use the preconfigured A-TDMA mode modulation profiles. Profiles 247 through 249 are A-TDMA mode modulation profiles using customized burst parameters.

cable modulation-profile 242 qam-8 
cable modulation-profile 243 qam-16 
cable modulation-profile 244 qam-32 
cable modulation-profile 245 qam-64 
cable modulation-profile 246 qpsk 
!
cable modulation-profile 247 request 4 16 0 8 64qam scrambler 152 diff 132 fixed qpsk1 1 2048 
cable modulation-profile 247 reqdata 13 116 32 23 qpsk scrambler 32 diff 2 fixed qpsk0 32 23 
cable modulation-profile 247 initial 5 34 0 48 64qam scrambler 152 diff 128 fixed qpsk1 1 2048 
cable modulation-profile 247 station 5 34 0 48 64qam scrambler 152 diff 128 fixed qpsk1 1 2048 
cable modulation-profile 247 a-short 9 76 5 8 64qam scrambler 152 diff 160 shortened qpsk1 1 2048 
cable modulation-profile 247 a-long 12 231 0 8 64qam scrambler 152 diff 132 shortened qpsk1 1 2048 
cable modulation-profile 247 a-ugs 6 253 0 0 16qam scrambler 0 diff 4 fixed qpsk0 255 18 
!
cable modulation-profile 248 request 0 16 0 8 32qam scrambler 152 no-diff 132 fixed qpsk1 1 2048 
cable modulation-profile 248 initial 7 34 0 48 32qam scrambler 152 no-diff 130 fixed qpsk1 1 2048 
cable modulation-profile 248 station 7 34 0 48 32qam scrambler 152 no-diff 130 fixed qpsk1 1 2048 
cable modulation-profile 248 a-short 9 76 6 8 32qam scrambler 152 no-diff 160 shortened qpsk1 1 2048 
cable modulation-profile 248 a-long 12 231 0 8 32qam scrambler 152 no-diff 132 shortened qpsk1 1 2048 
cable modulation-profile 248 a-ugs 7 231 0 8 32qam scrambler 152 no-diff 80 shortened qpsk1 1 2048 
!
cable modulation-profile 249 request 0 16 0 8 16qam scrambler 152 no-diff 68 fixed qpsk1 1 2048 
cable modulation-profile 249 initial 5 34 0 48 16qam scrambler 152 no-diff 128 fixed qpsk1 1 2048 
cable modulation-profile 249 station 5 34 0 48 16qam scrambler 152 no-diff 128 fixed qpsk1 1 2048 
cable modulation-profile 249 a-short 6 76 7 8 16qam scrambler 152 no-diff 160 shortened qpsk1 1 2048 
cable modulation-profile 249 a-long 9 231 0 8 16qam scrambler 152 no-diff 132 shortened qpsk1 1 2048 
cable modulation-profile 249 a-ugs 3 231 0 8 16qam scrambler 152 no-diff 80 shortened qpsk1 1 2048 

Cisco uBR-MC28U/X Cable Interface Configurations

This section provides the following sample configurations for the cable interfaces on the Cisco uBR-MC28U line card:

DOCSIS 1.X Configuration

DOCSIS 2.0 ATDMA Configuration

EuroDOCSIS 1.X Configuration

EuroDOCSIS 2.0 ATDMA Configuration

The configurations for the Cisco uBR-MC28X are identical to these configurations, except that the following commands for the integrated upconverter are not used:

cable downstream rf-power

cable downstream rf-shutdown

DOCSIS 1.X Configuration

!
interface Cable6/0
 description For DOCSIS 1.1 (North American) Cable Modems 
 no ip address
 load-interval 30
 no keepalive
 shutdown
 cable bundle 2
 cable downstream annex B
 cable downstream modulation 64qam
 cable downstream interleave-depth 32
 cable downstream frequency 555000000
 cable downstream channel-id 0
 cable downstream description This is the downstream 0 on MC28U for cable interface 6/0 
 no cable downstream rf-shutdown
 cable downstream rf-power 58
 cable upstream 0 frequency 10000000
 cable upstream 0 power-level 0
 cable upstream 0 channel-width 1600000 1600000
 cable upstream 0 minislot-size 4
 cable upstream 0 data-backoff automatic
 cable upstream 0 modulation-profile 41
 no cable upstream 0 shutdown
 cable upstream 1 channel-width 1600000 1600000
 cable upstream 1 minislot-size 4
 cable upstream 1 modulation-profile 41
 cable upstream 1 shutdown
 cable upstream 2 channel-width 1600000 1600000
 cable upstream 2 minislot-size 4
 cable upstream 2 modulation-profile 41
 cable upstream 2 shutdown
 cable upstream 3 channel-width 1600000 1600000
 cable upstream 3 minislot-size 4
 cable upstream 3 modulation-profile 41
 cable upstream 3 shutdown
!
interface Cable6/1
 description For DOCSIS 1.1 (North American) Cable Modems 
 ip address 180.1.1.1 255.255.0.0
 ip helper-address 1.8.79.1
 load-interval 30
 cable bundle 2 master
 cable downstream annex B
 cable downstream modulation 64qam
 cable downstream interleave-depth 32
 cable downstream frequency 555000000
 cable downstream channel-id 3
 cable downstream description This is the downstream 0 on MC28U for cable interface 6/1 
 no cable downstream rf-shutdown
 cable downstream rf-power 50
 cable upstream 0 frequency 10000000
 cable upstream 0 power-level 0
 cable upstream 0 channel-width 1600000 1600000
 cable upstream 0 minislot-size 4
 cable upstream 0 data-backoff automatic
 cable upstream 0 modulation-profile 41
 no cable upstream 0 shutdown
 cable upstream 1 channel-width 1600000 1600000
 cable upstream 1 minislot-size 4
 cable upstream 1 modulation-profile 41
 cable upstream 1 shutdown
 cable upstream 2 channel-width 1600000 1600000
 cable upstream 2 minislot-size 4
 cable upstream 2 modulation-profile 41
 cable upstream 2 shutdown
 cable upstream 3 channel-width 1600000 1600000
 cable upstream 3 minislot-size 4
 cable upstream 3 modulation-profile 41
 cable upstream 3 shutdown 

DOCSIS 2.0 ATDMA Configuration

!
interface Cable3/0
 ip address 10.10.0.1 255.255.0.0
 ip helper-address 10.10.2.2
 no ip mroute-cache
 load-interval 30
 no keepalive
 cable downstream annex B
 cable downstream modulation 256qam
 cable downstream interleave-depth 32
 cable downstream frequency 555000000
 cable downstream channel-id 3
 no cable downstream rf-shutdown
 cable upstream 0 frequency 30000000
 cable upstream 0 docsis-mode atdma
 cable upstream 0 power-level 0
 cable upstream 0 channel-width 6400000 6400000
 cable upstream 0 minislot-size 1
 cable upstream 0 modulation-profile 242
 no cable upstream 0 rate-limit
 no cable upstream 0 shutdown
 cable upstream 1 frequency 30000000
 cable upstream 1 docsis-mode atdma
 cable upstream 1 power-level 0
 cable upstream 1 channel-width 6400000 6400000
 cable upstream 1 minislot-size 1
 cable upstream 1 modulation-profile 241
 no cable upstream 1 rate-limit
 no cable upstream 1 shutdown
 cable upstream 2 frequency 13008000
 cable upstream 2 power-level 0
 cable upstream 2 channel-width 3200000 1600000
 cable upstream 2 minislot-size 2
 cable upstream 2 modulation-profile 41
 no cable upstream 2 rate-limit
 cable upstream 2 shutdown
 cable upstream 3 frequency 17008000
 cable upstream 3 power-level 0
 cable upstream 3 channel-width 3200000 1600000
 cable upstream 3 minislot-size 2
 cable upstream 3 modulation-profile 41
 no cable upstream 3 rate-limit

EuroDOCSIS 1.X Configuration


Tip EuroDOCSIS configurations are identical to the DOCSIS configurations, except that the downstream is configured for Annex A mode, using the cable downstream annex A command, and the upstream supports the greater frequency range (5 to 65 MHz) used on EuroDOCSIS networks.


!
interface Cable6/0
 no ip address
 no ip mroute-cache
 load-interval 30
 cable bundle 1 master
 cable downstream annex A
 cable downstream modulation 256qam
 cable downstream frequency 666000000
 cable downstream channel-id 0
 no cable downstream rf-shutdown
 cable upstream 0 description Node23 0
 cable upstream 0 spectrum-group 1
 cable upstream 0 power-level -10
 cable upstream 0 channel-width 3200000 1600000
 cable upstream 0 minislot-size 4
 cable upstream 0 data-backoff automatic
 cable upstream 0 modulation-profile 42
 no cable upstream 0 shutdown
 cable upstream 1 description Node23 1
 cable upstream 1 spectrum-group 2
 cable upstream 1 power-level -10
 cable upstream 1 channel-width 3200000 1600000
 cable upstream 1 minislot-size 4
 cable upstream 1 data-backoff automatic
 cable upstream 1 modulation-profile 42
 no cable upstream 1 shutdown
 cable upstream 2 description Node23 2
 cable upstream 2 spectrum-group 3
 cable upstream 2 power-level -10
 cable upstream 2 channel-width 3200000 1600000
 cable upstream 2 minislot-size 4
 cable upstream 2 data-backoff automatic
 cable upstream 2 modulation-profile 42
 no cable upstream 2 shutdown
 cable upstream 3 description Node23 3
 cable upstream 3 spectrum-group 4
 cable upstream 3 power-level -10
 cable upstream 3 channel-width 3200000 1600000
 cable upstream 3 minislot-size 2
 cable upstream 3 data-backoff automatic
 cable upstream 3 modulation-profile 42
 no cable upstream 3 shutdown
!
interface Cable6/1
 no ip address
 load-interval 30
 cable bundle 1
 cable downstream annex A
 cable downstream modulation 256qam
 cable downstream frequency 666000000
 cable downstream channel-id 0
 no cable downstream rf-shutdown
 cable upstream 0 spectrum-group 1
 cable upstream 0 power-level 0
 cable upstream 0 channel-width 3200000 1600000
 cable upstream 0 minislot-size 4
 cable upstream 0 modulation-profile 41
 no cable upstream 0 shutdown
 cable upstream 1 spectrum-group 2
 cable upstream 1 power-level 0
 cable upstream 1 channel-width 1600000 1600000
 cable upstream 1 minislot-size 4
 cable upstream 1 modulation-profile 41
 no cable upstream 1 shutdown
 cable upstream 2 spectrum-group 3
 cable upstream 2 power-level 0
 cable upstream 2 channel-width 3200000 1600000
 cable upstream 2 minislot-size 4
 cable upstream 2 modulation-profile 41
 no cable upstream 2 shutdown
 cable upstream 3 spectrum-group 4
 cable upstream 3 power-level 0
 cable upstream 3 channel-width 3200000 1600000
 cable upstream 3 minislot-size 2
 cable upstream 3 modulation-profile 41
 no cable upstream 3 shutdown

EuroDOCSIS 2.0 ATDMA Configuration


Tip EuroDOCSIS configurations are identical to the DOCSIS configurations, except that the downstream is configured for Annex A mode, using the cable downstream annex A command, and the upstream supports the greater frequency range (5 to 65 MHz) used on EuroDOCSIS networks.


!
interface Cable3/0
 ip address 10.10.0.1 255.255.0.0
 ip helper-address 10.10.2.2
 no ip mroute-cache
 load-interval 30
 no keepalive
 cable downstream annex A 
 cable downstream modulation 256qam
 cable downstream interleave-depth 32
 cable downstream frequency 555000000
 cable downstream channel-id 3
 no cable downstream rf-shutdown
 cable upstream 0 frequency 30000000
 cable upstream 0 docsis-mode atdma
 cable upstream 0 power-level 0
 cable upstream 0 channel-width 6400000 6400000
 cable upstream 0 minislot-size 1
 cable upstream 0 modulation-profile 242
 no cable upstream 0 rate-limit
 no cable upstream 0 shutdown
 cable upstream 1 frequency 30000000
 cable upstream 1 docsis-mode atdma
 cable upstream 1 power-level 0
 cable upstream 1 channel-width 6400000 6400000
 cable upstream 1 minislot-size 1
 cable upstream 1 modulation-profile 241
 no cable upstream 1 rate-limit
 no cable upstream 1 shutdown
 cable upstream 2 frequency 13008000
 cable upstream 2 power-level 0
 cable upstream 2 channel-width 3200000 1600000
 cable upstream 2 minislot-size 2
 cable upstream 2 modulation-profile 41
 no cable upstream 2 rate-limit
 cable upstream 2 shutdown
 cable upstream 3 frequency 17008000
 cable upstream 3 power-level 0
 cable upstream 3 channel-width 3200000 1600000
 cable upstream 3 minislot-size 2
 cable upstream 3 modulation-profile 41
 no cable upstream 3 rate-limit

System Error Messages

Cisco IOS Release 12.2(15)CX adds the following system error messages to support the Cisco uBR-MC28U/X cable interface line card.

MCU

The following system error messages display information about the Cisco uBR-MC28U/X cable interface card's hardware or initialization problems.

%MCU-1-CONFIGNOTETHER: Cannot configure any of the IPC ethernet interfaces 

Explanation    The internal Ethernet interfaces on the cable interface line card, which are used for interprocess communications (IPC) with the main processor, cannot be configured.

Recommended Action    Remove and reinsert the specified cable interface line card. Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCU-1-DISCOVER: Cannot initialize bay [dec], shutting down bay 

Explanation    The Cisco CMTS router could not initialize the indicated backplane bay and is shutting down the bay to prevent possible hardware problems.

Recommended Action    Remove and reinsert the Cisco uBR-MC28U/X card. If the problem persists, reload the Cisco CMTS router.

%MCU-3-EREVENT: slot ([dec]):([chars]) 

Explanation    The cable interface line card in the indicated slot experienced the indicated error event or failure.

Recommended Action    Remove and reinsert the specified cable interface line card. Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCU-3-GENERAL: [chars] 

Explanation    The cable interface line card in the indicated slot experienced a general failure, as defined by the failure string.

Recommended Action    Remove and reinsert the specified cable interface line card. Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCU-6-HWREV: Slot [dec]: HW revision is [dec] 

Explanation    An informational message that displays the current hardware revision for the Cisco uBR-MC28U/X cable interface line card.

Recommended Action    No action is needed.

%MCU-6-OLDHWREV: Slot [dec]: HW revision is below 1.8 - board should be upgraded 

Explanation    The Cisco uBR-MC28U/X cable interface line card in the indicated slot has a pre-release hardware revision. The card must be at hardware revision 1.8 or above to be able to run current Cisco IOS software.

Recommended Action    Contact your Cisco technical support representative to arrange for the Cisco uBR-MC28U/X card to be upgraded to the proper hardware revision.

%MCU-5-RESET: MCU port adapter was in slot [dec] was reset 

Explanation    The indicated cable interface line card was reset, either by a user manually resetting the card from the command-line interface (CLI), or by the system.

Recommended Action    No action is needed.

MCUCLC

The following system error messages display information about errors that have occurred during the operation of the Cisco IOS software on the Cisco uBR-MC28U/X cable interface card.

%MCUCLC-3-EREVENT: [chars] 

Explanation    The cable interface line card in the indicated slot experienced a general failure, as defined by the failure string.

Recommended Action    Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUCLC-6-PCIENBDISAB: NPE PCI data interface [[dec]]: [chars] 

Explanation    The network processing engine (NPE) PCI data interface has been enabled or disabled, as indicated.

Recommended Action    No action is needed.

%MCUCLC-3-PCIANALYZE: PCI device ([dec]) initialization failed 

Explanation    The PCI device initialization failed on the cable interface line card. This typically indicates a system fault with the card.

Recommended Action    Remove and reinsert the specified cable interface line card. Verify that you are running released software on the CMTS. If the problem persists, contact your Cisco technical support representative to arrange for the Cisco uBR-MC28U/X card to be upgraded or replaced.

%MCUCLC-3-NOTMCU: PCI device ID seen as [hex], expected [hex] 

Explanation    The Cisco IOS software could not recognize the Sibyte chips on the cable interface line card. This could indicate a faulty or incomplete initialization of the cable interface line card.

Recommended Action    Power down the Cisco CMTS router, remove and reinsert the cable interface line card, and reboot. If the message reoccurs, verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. Contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUCLC-3-UNKEVENT: [chars]: [dec] 

Explanation    The Cisco IOS software received an unknown event from the cable interface line card. This could indicate that the Cisco IOS software release that is running on the cable interface line card is not the same release that is running on the Cisco CMTS router.

Recommended Action    Verify that you are running released software on the CMTS. Remove and reinsert the cable interface line card to force it to reload its onboard Cisco IOS software. If the problem persists, issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

MCUFSM

The following system error messages display information about unexpected events that have occurred with the finite state machine (FSM) that operates on the Cisco uBR-MC28U/X cable interface card to control online insertion and removal (OIR) operations.

%MCUFSM-3-BADSLOT: Invalid slot [dec] in function [chars] 

Explanation    The cable interface line card received an invalid slot number as part of an interprocess communications message.

Recommended Action    Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUFSM-1-CARD_LOADING: Card in slot ([dec]) booting: [chars], size [dec] bytes, 
version [hex], checksum [hex] 

Explanation    The indicated cable interface line card is loading and booting the indicated microcode software image. This typically should happen only during system initialization and during OIR of the card.

Recommended Action    Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUFSM-3-ENQFAIL: Enqueue of message failed slot ([dec]), major event ([dec]) 

Explanation    The indicated cable interface line card could not enqueue an OIR message to the proper event queue, typically because of insufficient memory resources.

Recommended Action    Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUFSM-3-FSMEXECUTE: slot [dec]: fsm execution failed ([dec]) 

Explanation    The finite state machine that operates on the indicated cable interface line card encountered the general failure that is indicated by the failure string.

Recommended Action    Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUFSM-3-GENERAL: [chars] 

Explanation    The finite state machine operating in the software encountered the general failure indicated by the failure string.

Recommended Action    Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUFSM-3-LOADEXIST: slot [dec]: previous download process 

Explanation    A previous download process exists on the indicated cable interface line card, and a new download cannot start until this previous process terminates.

Recommended Action    Remove and reinsert the indicated cable interface line card. Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUFSM-3-OPENERR: slot [dec]: failed to open file [chars] 

Explanation    The cable interface line card failed to open the indicated microcode software file for download to the card.

Recommended Action    Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

%MCUFSM-3-UNKNOWN: card type is unknown for slot ([dec]) in [chars] 

Explanation    The OIR finite state machine could not identify the card that is in the indicated slot.

Recommended Action    Verify that you are running released software on the CMTS. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information.

UBR7200

%UBR7200-3-L2VPNNOTSUPPORTED: L2 VPN ATM-VC mapping not currently supported on 
mc28u cards.

Explanation    The Cisco uBR-MC28U/X cable interface line card does not support the Transparent LAN Service over Cable feature (which is enabled using the cable l2-vpn-service atm-vc command), but the cable vc-map command has been used to map traffic from a cable modem that is using the Cisco uBR-MC28U/X card.

Recommended Action    Disable the Transparent LAN Service over Cable feature for all cable modems that are using the Cisco uBR-MC28U/X card, using the no cable vc-map command. If a later Cisco IOS Release is available for the Cisco uBR7246VXR router, check to see if this restriction has been removed, and if so, upgrade the Cisco IOS software on the router.

Additional References

For additional information related to the Cisco uBR-MC28U/X cable interface line card, refer to the following references:

Related Documents

Related Topic
Document Title

CMTS Command Reference

Cisco IOS CMTS Cable Command Reference

CMTS Configuration Guide

Cisco IOS CMTS Cable Software Configuration Guide, Release 12.2SC

Hardware Installation Quick Start Guide

Installing Cisco uBR-MC28U/X and uBR-E-28U Cable Interface Line Cards


Standards

Standards 1
Title

SP-RFIv1.1-I09-020830

Data-over-Cable Service Interface Specifications Radio Frequency Interface Specification, version 1.1

SP-RFIv2.0-I03-021218

Data-Over-Cable Service Interface Specifications Radio Frequency Interface Specification, version 2.0

SP-OSSIv2.0-I03-021218

Data-Over-Cable Service Interface Specifications Operations Support System Interface Specification, version 2.0

SP-BPI+-I09-020830

Data-Over-Cable Service Interface Specifications Baseline Privacy Plus Interface Specification, version 2.0

1 Not all supported standards are listed.


MIBs

MIBs 1
MIBs Link

DOCS-BPI-PLUS-MIB

DOCS-CABLE-DEVICE-MIB (RFC 2669)

DOCS-CABLE-DEVICE-TRAP-MIB

DOCS-IF-EXT-MIB

DOCS-IF-MIB (RFC 2670)

DOCS-QOS-MIB

DOCS-SUBMGT-MIB

IGMP-STD-MIB (RFC 2933)

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

1 Not all supported MIBs are listed.


RFCs


Technical Assistance

Description
Link

Technical Assistance Center (TAC) home page, containing 30,000 pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/cisco/web/support/index.html


Command Reference

The following commands were added or modified to support the Cisco uBR-MC28U/X card.

cable downstream frequency

cable downstream rf-power

cable downstream rf-shutdown

cable modulation-profile

cable upstream channel-width

cable upstream docsis-mode

cable upstream equalization-coefficient

cable upstream ingress-noise-cancellation

cable upstream maintain-psd

cable upstream minislot-size

cable upstream modulation-profile

show cable logging

show cable modulation-profile

show interface cable mac-schedule

In addition, the following commands have had minor enhancements or additions to support the Cisco uBR-MC28U/X card:

cable modem qos profile—This command was changed so that it does not have any effect unless both the QoS profile specified by this command and the QoS profile specified for the CM in its DOCSIS configuration file are already created on the Cisco CMTS. This restriction did not exist in previous releases.

show cable modem phy—Displays the primary SID and DOCSIS operating mode for each cable modem.

show cable modem verbose—The output now includes the additional fields for DOCSIS 2.0 operation:

Phy Operating Mode—Displays the PHY-layer modulation mode for a particular cable modem (tdma or atdma).

Enable DOCSIS 2.0 Mode—Displays the value for the Enable DOCSIS 2.0 Mode field (TLV 39), if present, in the cable modem's DOCSIS configuration file or Registration Request message.

show controllers cable—The output for the Cisco uBR-MC28U/X card includes a count of "Null Modem RateLimit Dropped Pkts," which counts the total number of packets that were dropped because they had a service flow ID (SFID) of 0. This typically means the packets were dropped because of rate-limiting on their original service flows.