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Table Of Contents
Release Notes for Cisco uMG9820 QAM Gateway, Release 2.3
Determining the Software Version
New or Changed Hardware Features
New or Changed Software Features
Gigabit Ethernet and Fast Ethernet Ports
Ping Packet Size and Buffer Size
Obtaining Technical Assistance
Cisco Technical Support Website
Definitions of Service Request Severity
Obtaining Additional Publications and Information
Release Notes for Cisco uMG9820 QAM Gateway, Release 2.3
October 7, 2004
These release notes described the features and hardware and software requirements for Release 2.3 of the Cisco uMG9820 QAM Gateway.
These release notes include the following topics:
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Limitations and Restrictions
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Tip
Document History
Product Description
The Cisco uMG9820 QAM Gateway receives MPEG-2 single-program transport streams (SPTSs) encapsulated in user datagram protocol (UDP)/IP datagrams over Gigabit Ethernet (GE). The MPEG-2 SPTS packets are processed and remultiplexed into MPEG-2 multiprogram transport streams (MPTSs). The MPTS packets are in turn routed to QAM/RF cards for distribution over the CATV network to downstream connected set-top boxes (STB). (See Figure 1.) The QAM cards accept up to four MPTSs, and output up to four QAM-modulated and RF-upconverted signals. The modulation is 64QAM or 256QAM; there are two RF ports per QAM card, and two QAM channels per port.
Figure 1 Typical Video on Demand Network using the Cisco uMG9820 QAM Gateway
The Cisco uMG9820 incorporates a number of standard network protocols for management and control, including simple network management protocol (SNMP) for management and configuration, trivial file transfer protocol (TFTP) for firmware upgrades, dynamic host configuration protocol (DHCP) for dynamic address assignment, and Telnet for command-line configuration options.
System Requirements
This section describes system requirements for the Cisco uMG9820 QAM Gateway, Release 2.3.
Hardware Supported
Table 1 shows hardware compatible with the Cisco uMG9820 QAM Gateway.
Software Supported
The Cisco uMG9820 QAM Gateway now supports software Release 2.3. The image for this release is posted on Cisco.com at the following URL:
http://www.cisco.com/cgi-bin/tablebuild.pl/umg9820
Determining the Software Version
To determine the version of software running on a Cisco uMG9820, log in to the QAM Gateway and enter the show version command in EXEC mode:
umg9820> show versionShell v2.3Compiled 06-Oct-04 17:53 by root on beren 2.4.18-3 unknownNew and Changed Information
This section summarizes new or changed information in Release 2.3. For additional information, see the Cisco uMG9820 QAM Gateway Installation and Configuration Guide for Release 2.3.
New or Changed Hardware Features
64QAM Support
With Release 2.3, 64QAM support is added.
DVB-ASI Monitor Port
In Release 2.3, the Digital Video Broadcast-Asynchronous Serial Interface (DVB-ASI) port on the rear panel of the Cisco uMG9820 is functional. You can route the input of a single QAM channel to the asynchronous serial interface (ASI) port to monitor the channel using test equipment.
Verification of QAM Cards
Effective with Release 2.3, QAM cards are verified to be Cisco branded. Others are disabled.
New or Changed Software Features
New MIBs
The following MIBs are new in Release 2.3:
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Configuring SNMP
The following command sets the SNMP community string:
snmp-server community community-string {RO | RW}
The SNMP community string authenticates access to MIB objects, and functions as an embedded password.
The following command establishes the SNMP host IP address:
[no] snmp-server host IP-address {informs [version 2c} | traps [versions {1 | 2c}] community-string
Configuring Logging
The following command sets the severity level of messages displayed to the console:
[no] logging console [emergencies | alerts | critical | error | warning | notifications | informational | debugging]
The following command sets the severity level of local syslog messages:
[no] logging level [emergencies | alerts | critical | error | warning | notifications | informational | debugging]
The following command displays the entries in the current log file:
show logging number-of-lines
Configuring the Clock
The following new command sets the real-time system clock:
clock set
The following command sets the system clock to the real-time clock:
clock update
Executing Enable Mode Commands from Configuration Mode or Submode
The following command allows execution of the clear, clock, copy, hostname, reload, show, and upgrade enable mode commands while still in configuration or submode prompt:
do enable-mode-command
ASI Port Configuration
The following command is used to enable and disable the ASI port:
[no] shut
The following command selects a video stream to route to the ASI port:
video route slot/port.qam
The following command displays interface statistics for the ASI port:
show interface asi slot/port
Enabling and Disabling Autonegotiation on a GE Port
The following command enables or disables the autonegotiation feature of the specified GE port:
[no] negotiation auto
GE Session Commands
Session timeouts
The following command now sets session timeouts for all sessions:
[no] video timeout {signal-loss milliseconds | stop-psi milliseconds | session-close minutes}
Setting Bitwise Emulation Mode
Paired-bitwise has been added to the emulation mode command:
[no] video emulation-mode {bitwise | paired-bitwise} [number-ip-address {1 | 2 | 3}
Configuring Session Cloning and Multicast for Program Data Delivery
VoD Program Data Delivery (PDD) support is provided in Release 2.3 to allow the delivery of electronic program guide (EPG) data, other client data, and navigation data to a VoD client application running on the set-top box. PDD functionality on the Cisco uMG9820 supports multicast, cloning, and programs having up to 16 elementary streams.
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The following new commands are available to support this new feature:
To join or leave an internet group management protocol (IGMP) multicast group:
[no] ip igmp static-group {* | group-address [source {source-address | ssm-map}]}
To map an input UDP session to a particular QAM channel with a specified output program number:
[no] video udp UDP-port-number qam slot/port.qam program program-number
To map an input UDP session to all the 24 QAM channels on the device (all output programs have the same specified output program number):
[no] video udp UDP-port-number all program program-number
Limitations and Restrictions
This section lists limitations or restrictions on the functionality of this release.
Gigabit Ethernet and Fast Ethernet Ports
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CAS
The conditional access system (CAS) port (FastEthernet 0/2) is not fully functional. It only supports only pings and address resolution protocol (ARP) requests.
Ping Packet Size and Buffer Size
When issuing a ping command from Microsoft Windows to the Cisco uMG9820 GE port, the total packet size must be 64 bytes or less. Ensure that the payload size is approximately 10, by setting the buffer length to 10. For example,
ping -l 10 192.168.1.30where the -l option specifies the length of the buffer that should be used.
Maximum Jitter
The set maximum jitter command is not functional in this release.
Caveats
The following are the key caveats for the Cisco uMG9820 QAM Gateway. Workarounds are provided where applicable.
Open Caveats
This section describes possible unexpected behavior by Software Release 2.3 of the Cisco uMG9820.
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Network jitter above 70 milliseconds causes audio/video anomalies.
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The inactive timeout is used to indicate that no IP packets for a given session have been received for the timeout period (the default is 100 milliseconds). This is the first timeout that occurs when IP packets for a session are stopped. This timeout currently is not configurable by the user.
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When Vod trick mode is used, audio is dropped when exiting from fast-forward or fast-reverse to a normal play mode.
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When VoD trick mode is used, and the video stream is in fast-forward mode, the video flips twice within 2 seconds, then once between 5 and 10 seconds after that.
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the picture flips once vertically when entering or exiting VoD trick mode (fast-forward, rewind, or pause).
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When VoD trick mode is used (fast-forward and fast-rewind), the picture flips sideways to the right between 2 and 4 times a minute.
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When using an SDTV stream, after an access list is disabled, the picture flips vertically about 2 seconds after the stream starts.
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SNMP: The initial Get and Get Many using the Entity MIB are successful, but subsequent instances cause all of the MIB tables to fail.
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The result of the command show interface fastethernet 0/x or show interface gigabitethernet 0/x does not list the IP address, subnet mask, broadcast address, or gateway address.
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The Cisco uMG9820 does not give any warning messages if a multicast stream is configured to the same program number as a unicast stream.
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The video does not recover when switching between 64QAM and 256QAM.
The workaround is to reload the Cisco uMG9820. The video recovers once the Cisco uMG9820 reinitializes.
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The workaround is to reload the Cisco uMG9820 to clear the problem.
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After upgrading to the new software, you may be notified of errors regarding flash memory.
The workaround is to perform the upgrade again, using the upgrade now gigabitethernet force command.
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SNMP: The trap value and the get snmp value differ for the cvnSessionNotifLatestIndex object.
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SNMP: A successful set value is not reflected in the get for StartSessionUD.
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When performing a show running-configuration command, ip gratuitous-arp is listed twice.
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When multicast streams are cloned to all QAMs, the result of the show video session active command lists the QAMs out of order.
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Notification is sent continuously (or rows are added continuously in the notification table) even when the violation happens only once.
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SNMP: If you configure the SNMP host with traps, and then enable or disable the QAM interface, the traps are not received by the trap receiver. However, traps are received if the gigabit Ethernet interface is enabled or disabled. Traps should be sent to all interfaces including the QAM interface when the interfaces are enabled or disabled.
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The Cisco uMG9820 does not recognize the read-only SFP GBIC.
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SNMP: The Getbulk query fails and returns an SNMP segmentation fault error if the max-repetition value is greater than 71.
Resolved Caveats
This section lists caveats resolved in Release 2.3.
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It is not possible to set the severity of messages logged to the console.
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The user can set the logging severity level, but the result of the command is not displayed in the running configuration and is therefore not remembered following a power cycle.
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SNMP: When the command-line interface (CLI) is used to set the systemName parameter, the hostname is not updated.
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SNMP: After the trap configuration is changed to version 1, the Cisco uMG9820 still reports version 2c traps until the system is reloaded.
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SNMP: The RFC 1213 interface index entry "ifLastChange" currently is not supported.
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SNMP: The RFC 1213 interface index entry "ifInUnknownprotos" currently is not supported.
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In VoD trick mode, the audio may be garbled for the first 5 to 10 seconds when a stream starts. It may also be garbled for 5 to 10 seconds after returning to normal play mode from pause, fast-forward, and rewind.
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When dropping an incoming audio stream using the video udp command, the correct stream is dropped, but one of the remaining stream types is changed in the output PMT. This causes the stream to fail to be decoded.
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Under some circumstances, the message "QAM 1 oversubscription" is displayed in error.
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Bitwise mode configuration does not display completely in the running-configuration file. For example, if you configure your Cisco uMG9820 as "video emulation bitwise number-ip-address 3," the running configuration shows it only as "video emulation-mode bitwise."
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Transport stream ID (TSID) numbers are limited to the range 1-32767. The range should be 1-65535. The TSID is a two-byte unsigned integer that uniquely identifies an MPEG-2 transport stream. It is included in the program association table (PAT).
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When a user-defined UDP port is removed from the QAM interface, the output video is not stopped until the chassis is reloaded.
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GE and FE interfaces are listed twice in the configuration files. GE and FE configuration commands are divided between both instances. However, while cosmetically incorrect, this does not affect operation. All the configuration commands for the GE and FE ports are listed in the configuration files before the QAM interface configurations are listed.
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When the command video udp is used and the least significant bit of the port and the program number are the same, the command is not reflected in the configuration file. However, the QAM channel to which the command is applied is reflected. This means if the Cisco uMG9820 is reloaded (rebooted) because of a power failure or intentionally, the port mapping is lost.
However, if the streams are started after the commands are entered, the ports are mapped correctly, even though this is not displayed in the configuration file.
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Each time the command video udp UDP-port-number is used, two lines are added to the running-configuration file. The first line reflects the QAM channel slot and port, while the second is the actual command.
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For maximum compatibility with older models of the Motorola DCT2000, the default interleaver mode should be 128,4.
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When no video udp UDP-port-number is used to remove the mapping of a UDP port, an incorrect confirmation message is displayed. This does not affect the proper completion of the command.
Related Documentation
Platform-Specific Documents
Following are documents containing information specific to the Cisco uMG9820 QAM Gateway. You can access the URLs listed for each document on Cisco.com on the World Wide Web.
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http://www.cisco.com/univercd/cc/td/doc/product/cable/vod/umg9820/9820rkmt.htm
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http://www.cisco.com/univercd/cc/td/doc/product/cable/vod/umg9820/9820icg2/index.htm
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http://www.cisco.com/univercd/cc/td/doc/product/cable/vod/umg9820/9820rcsi.htm
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http://www.cisco.com/univercd/cc/td/doc/product/cable/vod/umg9820/20profru.htm
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http://www.cisco.com/univercd/cc/td/doc/product/cable/vod/umg9820/20qamfru.htm
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http://www.cisco.com/univercd/cc/td/doc/product/cable/vod/umg9820/20fanfru.htm
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http://www.cisco.com/univercd/cc/td/doc/product/cable/vod/umg9820/20profru.htm
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation at this URL:
http://www.cisco.com/univercd/home/home.htm
You can access the Cisco website at this URL:
You can access international Cisco websites at this URL:
http://www.cisco.com/public/countries_languages.shtml
Ordering Documentation
You can find instructions for ordering documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm
You can order Cisco documentation in these ways:
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http://www.cisco.com/en/US/partner/ordering/index.shtml
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Documentation Feedback
You can send comments about technical documentation to bug-doc@cisco.com.
You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Obtaining Technical Assistance
For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, Cisco Technical Support provides 24-hour-a-day, award-winning technical assistance. The Cisco Technical Support Website on Cisco.com features extensive online support resources. In addition, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not hold a valid Cisco service contract, contact your reseller.
Cisco Technical Support Website
The Cisco Technical Support Website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day, 365 days a year at this URL:
http://www.cisco.com/techsupport
Access to all tools on the Cisco Technical Support Website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:
http://tools.cisco.com/RPF/register/register.do
Submitting a Service Request
Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool automatically provides recommended solutions. If your issue is not resolved using the recommended resources, your service request will be assigned to a Cisco TAC engineer. The TAC Service Request Tool is located at this URL:
http://www.cisco.com/techsupport/servicerequest
For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553 2447For a complete list of Cisco TAC contacts, go to this URL:
http://www.cisco.com/techsupport/contacts
Definitions of Service Request Severity
To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.
Severity 1 (S1)—Your network is "down," or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.
Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.
Severity 3 (S3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.
Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online and printed sources.
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http://www.cisco.com/go/marketplace/
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http://cisco.com/univercd/cc/td/doc/pcat/
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http://www.cisco.com/go/iqmagazine
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http://www.cisco.com/en/US/learning/index.html
This document is to be used in conjunction with the documents listed in Related Documentation.
Copyright © 2004 Cisco Systems, Inc. All rights reserved.
Posted: Wed Dec 7 03:50:34 PST 2005
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