Release Notes for the Cisco uMG9850 QAM Module, Cisco IOS Release 12.1(20)EU

These release notes describe the features, memory requirements, and hardware and software requirements in Cisco IOS release 12.1(20)EU to support the Cisco uMG9850 QAM Module on Cisco Catalyst 4500 series switches.

Note

Use these release notes with Release Notes for Cisco Catalyst 4500 Series Switch, Cisco IOS Release 12.1(20)EW located on Cisco.com. Refer to Related Documentation.

Introduction

Cisco IOS Release 12.1(20)EU is an Early Deployment (ED) release based on Cisco IOS Release 12.1(20)EW.

Note

Although Cisco IOS Release 12.1(20)EU is compatible with Cisco IOS Release 12.1(20) EW, it is designed to support the functionality of the Cisco uMG9850 in VoD applications. Not all features applicable to traditional switching apply to the Cisco uMG9850. For configuration instructions and the command reference for the Cisco uMG9850, refer to Configuring the Cisco uMG9850 QAM Module in Related Documentation

The Cisco uMG9850, designed for the Cisco Catalyst 4500 series switches, provides Video-on-Demand (VoD) services for a hybrid fiber coaxial (HFC) cable network. It accepts Moving Pictures Expert Group-2 (MPEG-2) digital video from an IP network, and outputs the video as a quadrature amplitude modulated (QAM) RF stream that can be received by digital set-top boxes (STBs) over the cable network.

System Requirements

This section describes the system requirements for Cisco IOS Release 12 1(20)EU:

Memory Requirements

Minimum memory and flash configuration on the Cisco Catalyst 4500 series switch is sufficient to support the Cisco uMG9850 QAM Module.

Hardware Compatibility

Table 1 lists hardware that is compatible with the Cisco uMG9850 QAM Module when used with Cisco IOS Release 12.1(20)EU.

Table 1 Hardware Compatibility
	Product Number	Description	Notes
Cisco Catalyst Switches	WS-C4506	Cisco Catalyst 4506 switch chassis
Cisco Catalyst Switches	WS-C4507R	Cisco Catalyst 4507R switch chassis
Supervisor Engine	WS-X4515	Cisco Catalyst Supervisor Engine IV
Power Supplies	PWR-C45-1000AC	1000 W AC power supply	For either switch chassis, can be configured with up to three Cisco uMG9850 QAM Modules. With four or five modules inserted, the 1400W (AC or DC) power supply must be used.
	PWR-C45-1000AC/2	Redundant power supply	Can be configured along with the 1000 W AC power supply.
	PWR-C45-1400DC-P	1400 W DC power supply	For either switch chassis, can be configured with up to five Cisco uMG9850 QAM Modules.
	PWR-C45-1400DC-P/2	Redundant power supply	Can be configured along with the 1400 W DC power supply.
	PWR-C45-1400AC	1400 W AC power supply	For either switch chassis, can be configured with up to five Cisco uMG9850 QAM Modules.
	PWR-C45-1400AC/2	Redundant power supply	Can be configured along with the 1400 W AC power supply.
Switching Modules	WS-X4148-RJ	48-port 10/100 Fast Ethernet RJ-45 switching module
Switching Modules	WS-X4306-GB	6-port 1000BASE-X (GBIC) Gigabit Ethernet switching module
SFPs	GLC-SX-MM=	1000BASE-SX SFP
	GLC-LX-SM=	1000BASE-LX SFP
	CWDM-SFP-XXXX=	Cisco CWDM SFP	XXXX=wavelength

Software Compatibility

The Cisco uMG9850 QAM Module is only currently supported in Cisco IOS Release 12.1(20)EU. Images for this release are listed in Table 2 and are available from Cisco.com at the following URL:

Table 2 Cisco IOS Software Release 12.1(20)EU Images and Features
Image	Description
cat4000-i9su3-mz	Cisco IOS Software for the Cisco uMG98250 QAM Module—Basic MPEG-2 digital video gateway software image, including Routing Information Protocol (RIP) v1 and v2, and static routes.
cat4000-i5su3-mz	Cisco IOS Software for the Cisco uMG98250 QAM Module—Enhanced MPEG-2 digital video gateway plus routing software image, including Open Shortest Path First (OSPF), Intermediate System to Intermediate System (IS-IS), Interior Gateway Routing Protocol (IGRP), and Enhanced IGRP (EIGRP).

Determining the Software Version

To determine the version of Cisco IOS software running on a Cisco Catalyst 4500 series switch, log in to the switch and enter the show version EXEC command:

Upgrading to a New Software Release

For information on upgrading software in your Cisco Catalyst 4500 series switch, refer to Release Notes for the Catalyst 4500 Series Switch, Cisco IOS Release 12.1(20)EW.

New and Changed Information

This is the initial release of support for the Cisco uMG9850 QAM module on the Cisco Catalyst 4500 series switch.

New MIBs

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

Limitations and Restrictions

This section lists limitations or restrictions of the functionality of this release.

Interleaver Settings and MPEG Analyzers

The default interleaver setting (128,4) may not work with some MPEG analyzers, such as the Tektronix MTM400 MPEG Transport Stream Monitor. Other interleaver settings should be used.

Caveats

Caveats describe unexpected behavior in Cisco IOS software release 12.1(20)EU specific to the Cisco uMG9850 QAM Module. Workarounds are provided where available.

Open Caveats—Release 12.1(20)EU

Under some conditions, when a VoD source sends non-compliant MPEG packets, there is a potential for the Cisco uMG9850 to reset.

Resolution: (1) Check your VoD source to be sure it is not sending non-compliant MPEG packets. (2) Reload the Cisco Catalyst 4500 series switch.

Removing user-defined UDP sessions for a QAM interface does not revert to default mapping.

The maximum and average jitter measurements may not be calculated correctly for active sessions.

Use the show video slot session active to determine the active ports, then issue the command again on a port-by-port basis (show video slot session UDP-port-number) to determine the measurements.

Fixed Caveats—Release 12.1(20)EU

A vulnerability in the Transmission Control Protocol (TCP) specification (RFC793) has been discovered by an external researcher. The successful exploitation enables an adversary to reset any established TCP connection in a much shorter time than was previously discussed publicly. Depending on the application, the connection may get automatically re-established. In other cases, a user will have to repeat the action (for example, open a new Telnet or SSH session). Depending upon the attacked protocol, a successful attack may have additional consequences beyond terminated connection which must be considered. This attack vector is only applicable to the sessions which are terminating on a device (such as a router, switch, or computer) and not to the sessions that are only passing through the device (for example, transit traffic that is being routed by a router). In addition, this attack vector does not directly compromise data integrity or confidentiality.

All Cisco products which contain TCP stack are susceptible to this vulnerability.

Related Documentation

Platform-Specific Documents

For a list of documents for the Cisco Catalyst 4500 series switch, refer to the Release Notes for the Catalyst 4500 Switch, Cisco IOS Release 12.1(20)EW on Cisco.com at this URL:

Hardware Documents

For instructions for installing the Cisco uMG9850 QAM Module in a Cisco Catalyst 4500 series switch, refer to Quick Start Guide—Installing the Cisco uMG9850 QAM Module on Cisco.com at this URL:

Software Documents

For configuration information specific to the uMG9850 QAM Module, refer to Configuring the Cisco uMG9850 QAM Module on Cisco.com at this URL:

Cisco IOS Software Documentation Set

For a list of Cisco IOS software documents, refer Release Notes for the Catalyst 4500 Switch, Cisco IOS Release 12.1(20)EW on Cisco.com at this URL:

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Table Of Contents

Release Notes for Cisco uMG9850 QAM Module, Cisco IOS Release 12.1(20)EU