Table Of Contents

Using Cisco QAM Gateway Manager

Launching Cisco QAM Gateway Manager

Main Window Components

Menu Bar

Toolbar

Status Bar

Navigation Tree

Work Area

Resizing the Navigation Tree and Work Area

Using Help

Screen-Specific Help

Full Help Set

Exiting Cisco QAM Gateway Manager

Establishing Communication with Cisco QAM Gateway Devices

Adding a Device

Removing a Device

Using the Telnet Window

Loading a Configuration from a TFTP Server

Configuring SNMP Parameters

Configuration Steps

Initial Configuration

Enabling or Disabling Ports and QAM Channels

Using Cisco QAM Gateway Manager

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This chapter describes the steps required to launch Cisco QAM Gateway Manager (Cisco QGM) and configure Cisco Catalyst switches and Cisco QAM gateways.

• Launching Cisco QAM Gateway Manager

• Main Window Components

• Using Help

• Exiting Cisco QAM Gateway Manager

• Establishing Communication with Cisco QAM Gateway Devices

• Configuration Steps

Launching Cisco QAM Gateway Manager

To launch Cisco QGM, click on cqm.bat in the C:\cqm_install directory on the desktop. The Main Window appears (see Figure 3-1).

Figure 3-1 Main Window

Main Window Components

The main window (see Figure 3-1) consists of five areas:

1. Menu bar

2. Toolbar

3. Status bar

4. Navigation tree

5. Work area

Each of these areas is discussed in the following sections.

Menu Bar

The menu bar (see Figure 3-2) provides access to common application functions and tasks (see Table 3-1).

Figure 3-2 Menu Bar

Table 3-1 Menu Bar Functions 

Menu	Function	Description
File	Add Device	Adds a Cisco Catalyst switch or Cisco uMG9820 QAM Gateway to the device list.
	Load Configuration	Loads a configuration file from a TFTP server.
	Save Startup to TFTP	Saves the startup configuration to a TFTP server.
	Configure SNMP Parameters	When "Cisco QAM Gateway Manager" (root) selected in the navigation tree, configures SNMP polling parameters. When device selected in the navigation tree, configures the Community String SNMP parameter for that device.
	Close All	Closes all open views and configuration dialog boxes.
	Exit	Exits Cisco QAM Gateway Manager application.
View	Chassis	Displays chassis statistics.
	Slot	Displays contents of slots in chassis.
	All Sessions	Lists both active and idle sessions.
	Sessions	Lists only active sessions.
	Interface	Displays ASI or Ethernet interface configurations.
Configure	Configure VLAN	Assigns an IP address and optional subnet mask to a selected VLAN. Activates or suspends a VLAN.
Telnet	Device 1	Allows selection of connected devices for Telnet sessions.
	Device n
Window	various	Lists all open/active views and configuration dialog boxes.
Help	Contents	Provides access to all help files by Table of Content heading and text search.
	About	Displays software version of Cisco QGM.

Toolbar

The toolbar ( Figure 3-3) provides quick access to some commonly performed tasks (see Table 3-2).

Figure 3-3 Toolbar

Table 3-2 Toolbar Functions 

Tool	Description
Add Device	Adds Cisco Catalyst switches and Cisco uMG9820 QAM Gateways to the navigation tree.
Configure	When "Cisco QAM Gateway Manager" (root) in the navigation tree (see Figure 3-1) is selected, allows configuration of SNMP polling parameters. When device is selected in the navigation tree, configures the Community String SNMP parameter for that device.
Refresh	Refreshes current view.
Stop	Stops refresh process for current view.

Status Bar

The Status Bar ( Figure 3-4) indicates status of configuration load and refresh operations (see Table 3-3).

Figure 3-4 Status Bar

Table 3-3 Status Bar Messages

Function	Description
Done	Function is complete.
Refreshing tree. Please wait.	Navigation tree refresh in process.
Loading slot configuration. Please wait.	Slot View information being loaded.
Loading Ethernet configurations. Please wait.	Ethernet Port View information being loaded.
Loading QAM channel configurations. Please wait.	QAM Channel View information being loaded.
Loading chassis configurations. Please wait.	Chassis View information being loaded.
Loading session configuration. Please wait.	Session View or session status information is being loaded.
Loading notification history. Please wait.	Refreshing Notification History table.

Navigation Tree

The Navigation Tree (see Figure 3-5) lists all added devices. Each entry expands to display its components. Use the scroll bar to see the full expansion.

Figure 3-5 Navigation Tree (Cisco Catalyst Switch Shown)

To refresh the navigation tree, select and right-click on "Cisco QAM Gateway Manager" at the top of the tree and choose Refresh tree. (See Figure 3-6.)

Figure 3-6 Refresh Navigation Tree

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Note Refreshing the navigation tree also collapses the navigation tree to the device level.

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Work Area

The Work area (see Figure 3-7) can contain a variety of view windows and configuration dialog boxes. This area changes depending on the function being performed (see Table 3-4). Up to 30 of these windows can be open simultaneously.

Figure 3-7 Work Area (Cisco Catalyst Switch Chassis View Shown)

Table 3-4 lists configuration, monitoring, and troubleshooting tasks that are commonly performed, and provides a cross-reference to the appropriate view or configuration window.

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Tip Print out Table 3-4 and keep it as a quick reference tool.

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Table 3-4 Quick Reference—Work Area Navigation Map 

Go To . . .	For This Task. . .	Or Subtask . . .	Notes
Chassis View •Contents of each slot in the device. •For Cisco Catalyst switches, the operating status.	Setting Up PSI Parameters (see Notes).	Setting PMT and PAT Intervals for the Switch.	Cisco Catalyst switches only.
		Setting PMT and PAT Intervals for a QAM Channel.
		Setting TSID and NIT-PID Values
	Setting Up, Editing, and Routing a Video Stream to a QAM Channel.	Statically Setting Session Timeouts.
Slot View •For a specific QAM device, a summary of the QAM channels' administrative and link status. •For Cisco Catalyst switches, the administrative and link status of ASI and Ethernet ports.	Configuring Gigabit Ethernet Input and Output Ports into a VLAN (see Notes).	Assigning the Output GE ports to a VLAN.	Cisco Catalyst switches only. See also Interface View (Ethernet) and Configure VLAN Dialog.
	Setting Up, Editing, and Routing a Video Stream to a QAM Channel.	Configuring Maximum Jitter for a Session.	See also QAM Channel View and Chassis View.
Session View •Statistics for active sessions.	View table of all active sessions.
All Session View •Statistics for both idle and active sessions.	View table of both idle and active sessions.	Check individual session Statistics (See Notes).	Idle sessions not shown for Cisco uMG9820. Session Details available on Cisco Catalyst switches only.
Interface View (ASI) •For a specific ASI port, lists the current configuration parameters for the ASI port and allows configuration of the administrative status, byte gap, and the QAM from which the stream is routed.	Enabling or Disabling Ports and QAM Channels.
Interface View (Ethernet) •For a specific Ethernet port, lists current status and configuration and allows configuration of the administrative status, switchport status, VLAN number, IP address and subnet mask.	Enabling or Disabling Ports and QAM Channels.
	Configuring Gigabit Ethernet Input and Output Ports into a VLAN.	Assigning the Input GE Port to a VLAN.	See also Interface View (Ethernet) and Slot View.
QAM Channel View •Lists the current configuration parameters for the selected QAM channel, and allows configuration of these parameters.	Setting the Output Frequency and Output Power of the QAM Channels.		Also see QAM Summary View.
	Setting Up, Editing, and Routing a Video Stream to a QAM Channel.	Setting the Modulation Format.
		Configuring the FEC Interleave Level and Mode.
		Statically Routing a Range of Program Sessions to a QAM Channel (UDP Port Mapping).
	Enabling or Disabling Ports and QAM Channels.
	Setting the Output Frequency and Output Power of the QAM Channels.	Setting the Output Frequency.
		Setting the Output Power.
QAM Summary View •Allows viewing and configuration of all QAM channels on a specific Cisco uMG9850 QAM module slot or Cisco uMG9820 QAM Gateway QAM slot.
Notification History •Lists statistics for a device. Each time a device threshold is passed or an error condition is detected, an entry is recorded in the table.
Configure VLAN Dialog	Configuring Gigabit Ethernet Input and Output Ports into a VLAN.	Selecting a VLAN Interface.	See also Interface View (Ethernet) and Slot View.
Telnet Window	Using the Telnet Window.

Choose an already opened view from the Window menu or open a new one using the View menu. To close all views simultaneously, choose File > Close All.

Resizing the Navigation Tree and Work Area

To hide the navigation tree and expand the work area, click on the left arrow. To hide the work area and expand the navigation tree, click on the right arrow. (See Figure 3-8.)

Figure 3-8 Hide Buttons

To readjust the navigation tree and work area to specific widths, place the cursor on the margin as shown in Figure 3-9. When it becomes a double-ended arrow, drag the margin to the left or right.

Figure 3-9 Sizing the Navigation Tree and Work Area

Using Help

The help files for the Cisco QAM Gateway Manager application are provided to simplify the use of the application. These files can be accessed in two ways:

•Help for a specific screen can be accessed by clicking Help on that screen.

•The full help set can be accessed by choosing Help > Contents or by pressing F1.

Screen-Specific Help

Clicking Help in a window opens the help set and displays help files for that particular window. These files include discussions of any configuration options or read-only values present. Further navigation cross-references are included where necessary for greater understanding.

Full Help Set

Choose Help > Contents or press F1 to open the entire help set.

The navigation pane on the left side of the window includes two tabs: the Contents tab and the Search tab. Navigation and printing aids are present in the help files and in the help toolbar. See Figure 3-10.

Figure 3-10 Help Tools and Tabs

Contents Tab

Click the Contents tab to display a Table of Contents of all help files, which allows you to click on a specific subject or task for information. See Figure 3-11.

Figure 3-11 Help File Table of Contents

Search Tab

Click the Search tab and enter a text search term. All help files are searched for the term, and the results (number of occurrences) are displayed in the left side of the window in order of significance. The page containing the first occurrence appears on the right. See Figure 3-12.

Figure 3-12 Help Files Search Tab

Navigation

Click the Home icon in the toolbar (see Figure 3-13) to return to the top file in the Table of Contents.

Figure 3-13 Home Icon

Click the arrows at the top and bottom of all the help file text windows (see Figure 3-14) to step backward and forward sequentially through the files.

Figure 3-14 Navigation Arrows

Use the arrows in the toolbar (see Figure 3-15) to return directly to the previous position in a text window.

Figure 3-15 Return to Previous

Printing

Click the printer icons in the toolbar (see Figure 3-16) for page setup or to print help text.

Figure 3-16 Print Icon

Reload

Click the reload icon in the toolbar (see Figure 3-17) to reload the current help page.

Figure 3-17 Reload Icon

Exiting Cisco QAM Gateway Manager

To exit the application, follow these steps:

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Step 1 Do one of the following:

•Choose File > Exit (see Figure 3-18).

Figure 3-18 File Exit

•Click the X in the upper-right corner of the Main Window (see Figure 3-19).

Figure 3-19 Exit Using X in Main Window

The Save Running Configuration dialog box appears. (see Figure 3-20).

Figure 3-20 Save Running Configuration

Step 2 Click Cancel to keep the application active and return to configuration tasks. Click Save All and Quit to save all configuration changes to the startup configuration. Click Save None and Quit to disregard all configuration changes. All active windows are closed and the Cisco QAM Gateway Manager session ends.

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Note If the Save all configurations to startup configuration? check box is selected in the Add Device or Configure SNMP Parameters dialog box (see "Adding a Device" section and "Configuring SNMP Parameters" section), configuration changes are automatically saved to the startup configuration each time Apply is clicked, independently of Save All and Quit or Save None and Quit selections.

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Establishing Communication with Cisco QAM Gateway Devices

• Adding a Device

• Removing a Device

• Using the Telnet Window

Adding a Device

To configure and monitor Cisco QAM Gateway devices, you must first add Cisco Catalyst switches and Cisco uMG9820 QAM Gateways to the device list. Up to 20 devices can be managed by Cisco QAM Gateway Manager. To add a device:

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Step 1 Select Add Device using one of the following methods:

•Choose File > Add Device (see Figure 3-21).

Figure 3-21 Add Device Using File Menu

•Click the Add Device tool (see Figure 3-22).

Figure 3-22 Add Device Using Add Device Button

•In the navigation tree, select, then right-click "Cisco QAM Gateway Manager" (see Figure 3-23).

Figure 3-23 Add Device Using Right Mouse Click

Step 2 In the Add Device dialog box, enter the IP Address and Community String of the device (see Figure 3-24).

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Note Entering the SNMP community string does not change the value on the device. It authenticates access to the device. The community string must be defined before adding the device to the list. See Before Using Cisco QAM Gateway Manager.

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If you want to automatically save all configurations to the startup configuration, select the check box. When the check box is selected, any change made to a device using Cisco QAM Gateway Manager is automatically saved to both the running and startup configuration files of that device. If the check box is not selected, configuration changes are saved only to the running configuration.

Figure 3-24 Add Device Dialog Box

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Note When using the option to automatically save all changed configuration information to the startup configuration file, you can make a backup of the existing startup configuration to a TFTP server before changing configurations. Choose File > Save Startup to TFTP (see Figure 3-25). This backup can be used in case it is necessary to restore the original startup configuration after a device reload.

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Figure 3-25 Save Startup to TFTP

Step 3 Click OK. The device name and its IP address are displayed in the navigation tree (see Figure 3-26).

Figure 3-26 Navigation Tree with Device Added

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Removing a Device

To remove a device from the list, do the following:

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Step 1 In the Navigation Tree, select the device to remove, then right-click. (see Figure 3-27).

Figure 3-27 Selecting Remove

Step 2 Choose Remove. When the confirmation screen appears, click Yes.

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Using the Telnet Window

Use the Telnet window to enter command-line interface (CLI) commands such as show commands, or perform configuration tasks on the devices listed in the navigation tree that cannot be achieved using the GUI interface.

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Note For further information regarding CLI commands refer to Cisco uMG9820 QAM Gateway Installation and Configuration Guide, Configuring the Cisco uMG9850 QAM Module, and Cisco Catalyst 4500 Series IOS Software Configuration Guide.

Commonly used show commands are summarized in Chapter 4, "Monitoring Cisco QAM Gateway Devices".

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To access a device using the Telnet window:

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Step 1 Choose the device using the Telnet menu (see Figure 3-28).

Figure 3-28 Telnet to Device

The Telnet window appears (see Figure 3-29).

Figure 3-29 Telnet Window

Step 2 Enter the Telnet password for the device and press Enter (see Figure 3-30).

Figure 3-30 Logged on to Device

Step 3 Enter any desired CLI commands.

Step 4 To terminate the Telnet session, type exit (see Figure 3-31), or choose File > Exit in the Telnet window menu bar.

Figure 3-31 Exiting Telnet Session

Step 5 To close the Telnet window, click the X in the upper right of the window.

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Loading a Configuration from a TFTP Server

An existing configuration of a Cisco Catalyst Switch or Cisco uMG9820 QAM Gateway can be downloaded from a TFTP server and sent to the running configuration or startup configuration of a device.

To load a configuration from a TFTP server:

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Step 1 Highlight the device and choose File > Load Configuration.

Figure 3-32 Choosing Load Configuration from the File Menu.

Step 2 Enter the TFTP server filename and IP address.

Figure 3-33 TFTP Server IP Address and Filename

Step 3 Select the Destination filename—either Startup configuration or Running configuration.

Step 4 Click OK to load the configuration. Click Cancel to close the window without loading a configuration.

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Note The device must be reloaded for the startup configuration to take effect. Changes to the running configuration take effect immediately.

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Configuring SNMP Parameters

Setting SNMP Polling Interval

The polling interval determines how frequently Cisco QAM Gateway Manager requests status information from each of the managed devices. To set the SNMP polling parameters for all devices:

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Step 1 Highlight "Cisco QAM Gateway Manager" in the navigation tree.

Step 2 Select Set SNMP Parameters using one of the following methods:

•Choose File > Configure SNMP Parameters (see Figure 3-34).

Figure 3-34 Using File Menu

•Right-click on "Cisco QAM Gateway Manager (see Figure 3-35).

Figure 3-35 Using Right Click

Step 3 Enter the polling interval (see Figure 3-36). The range of values is 180 to 3600 seconds. The default value is 180 seconds.

Figure 3-36 Polling Interval Configuration Dialog Box

Step 4 Click OK to save the configuration. Click Cancel to close the dialog box and discard any changes.

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Setting the SNMP Community String

If the system administrator changes the community string on the device, use this function to set the new SNMP community string for that device in Cisco QGM:

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Step 1 Highlight a device in the navigation tree.

Step 2 Select Set SNMP Parameters using one of the following methods:

•Choose File > Configure SNMP Parameters (see Figure 3-37).

Figure 3-37 Using File Menu

•Right-click on the device and choose Configure SNMP (see Figure 3-38).

Figure 3-38 Using Right Click

•Click Configure in the toolbar (see Figure 3-39).

Figure 3-39 Using Configure Button

Step 3 Enter the new SNMP community string and, if there has been a requirement change since first adding the device, select or deselect the Save all configurations to startup configuration? box (see Figure 3-40).

Figure 3-40 Configure SNMP Parameters Dialog Box

Step 4 Click OK to save the configuration. Click Cancel to close the dialog box and discard any changes

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Configuration Steps

Initial Configuration

Configuring Gigabit Ethernet Input and Output Ports into a VLAN

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Note This procedure applies to Cisco Catalyst switches only. It does not apply to the Cisco uMG9820 QAM Gateway.

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Outbound interfaces are included in single VLANs to use network addresses more efficiently. The IP addresses and subnet masks configured for each VLAN interface populate the IP switching table on the switch with the forwarding information needed to forward the video packets to their destination. The number and use of VLANs varies according to the programming and management needs of the system operator.

Do the following to select a VLAN interface, assign an IP address to the incoming (video source) interface, and assign input and output Gigabit Ethernet (GE) ports to the VLAN. This routes the incoming video to the appropriate output ports on the Cisco uMG9850 QAM module.

Selecting a VLAN Interface

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Step 1 Choose Configure > Configure VLAN (see Figure 3-41).

Figure 3-41 Configure VLAN Menu

The Configure VLAN dialog box appears (see Figure 3-42).

Figure 3-42 Configure VLAN Dialog Box

Step 2 Choose an existing VLAN from the drop-down menu and, if necessary, enter its IP address and subnet mask.

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Note If it is necessary to create a new VLAN, use the Telnet window and create the VLAN using commands found in Cisco Catalyst 4500 Series IOS Software Configuration Guide.

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Assigning the Input GE Port to a VLAN

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Step 1 Go to Ethernet Port View (see Table 3-4) and assign the GE interface of the incoming video stream to be included in the VLAN by entering the IP address and optional subnet mask of the interface. This is the interface of an incoming video stream (see Figure 3-43.)

Figure 3-43 Interface IP Address and Subnet Mask

Step 2 When assigning a VLAN to an Ethernet port, switchport status must be set to switchport using the Switchport Status drop-down menu (see Figure 3-44).

Figure 3-44 Setting Switchport Status

Step 3 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

Step 4 Return to the Configure VLAN dialog box and set Administrative Status to up.

Step 5 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Assigning the Output GE ports to a VLAN

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Step 1 Go to Slot View, Video Routing section and assign an IP address in the same subnet as that assigned to the VLAN in Step 2. This allows video packets to be switched from the input GE port to the output GE port.

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Note To remove the video stream from the VLAN, click the Clear Video Route? box.

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Figure 3-45 Setting the GE Port

Step 2 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Repeat these steps for additional VLAN and GE interfaces, as required.

Setting the Output Frequency and Output Power of the QAM Channels

Each F-connector (QAM port) provides two QAM channels, and the frequency and output power are configured for both channels simultaneously. Setting frequency and power for one QAM channel automatically sets the appropriate values for the other channel in the same interface.

The Frequency value configures the frequency for the upconverter connected to a QAM port. Configuring the frequency for one QAM channel automatically configures the correct frequency for the other QAM channel in its upconverter group. The frequency bandwidth of each QAM upconverter block is 6 MHz. Consequently, if QAM channel 1 is set to frequency f1, then the other QAM channel is automatically set to frequency f1 + 6 MHz. Similarly, if QAM channel 2 is set to frequency f2, then QAM channel 1 is automatically set to frequency f2 - 6 MHz.

The power value configures the power level for the upconverter connected to a QAM channel. Configuring the output power for one QAM channel automatically configures the same power level for the other QAM channel in its upconverter group.

Setting the Output Frequency

To set the output frequency of the QAM channel:

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Step 1 Go to QAM Channel View, Channel Information section (see Figure 3-46).

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Note For a map to this and all tasks, see Table 3-4.

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Figure 3-46 Setting the QAM Channel Frequency and Output Power in QAM Channel View (Cisco uMG9850 Shown)

Step 2 Enter the frequency for the selected channel.

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Note For the Cisco uMG9850, the frequency range for QAM channel 1 is 50000000 to 854000000 Hz, and for QAM channel 2 is 56000000 to 860000000.

For the Cisco uMG9820, the frequency range for QAM channel 1 is 222000000 to 897000000 Hz, and for QAM channel 2 is 228000000 to 903000000 Hz.

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Step 3 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Note For further information regarding the setting of QAM channel frequency and power, refer to Cisco uMG9820 QAM Gateway Installation and Configuration Guide and Configuring the Cisco uMG9850 QAM Module.

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Setting the Output Power

To set the QAM channel output power:

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Step 1 Go to QAM Channel View, Channel Information section (see Figure 3-46).

Step 2 Enter the desired QAM channel power.

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Note For the Cisco uMG9850, if both QAM channels in an RF port are enabled, the power range is 42 to 55 dBmV. The default value is 50 dBmV.

For the Cisco uMG9820, when you configure a power value for one QAM channel in a port, the other QAM in the port is assigned the same value. The power range is 44 to 60 dBmV. The default value is 50 dBmV.

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Step 3 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Setting Up, Editing, and Routing a Video Stream to a QAM Channel

Basic Tasks

Setting the Modulation Format

Each Cisco uMG9850 has six modulator groups, yielding a total of 24 channels per module. Setting the modulation format on one QAM channel applies the same format to all four QAM channels in a modulator group. For example, QAM channels 5/1.1, 5/1.2, 5/2.1, and 5/2.2

To set the modulation format for the QAM channel:

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Step 1 Go to QAM Channel View, Channel Information section (see Figure 3-46).

Step 2 Set the modulation format to either qam64 or qam256. The default value is qam256.

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Note If the FEC interleave level is set to 1, the value 256 is not valid. See the "Configuring the FEC Interleave Level and Mode" section that follows.

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Step 3 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Note If level 1 is already selected and it is necessary to change to qam256, first change the FEC Interleave level to 2, then click Apply and wait for the configuration change to take effect. Select qam256.

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Configuring the FEC Interleave Level and Mode

The FEC interleave settings set the Reed-Solomon forward error correction (FEC) interleave level and mode on a QAM port. Forward error correction reduces bit error rate (BER) in data transmission by correcting recovered bit errors in the demodulator. Interleaving is a technique that reorders (in time) individual code-word bits with other code-word bits to spread error bursts over many different code words. The technique used is compliant with ITU J.83, Annex B.

Setting the interleave level and mode on any of the 12 QAM interfaces (ports) sets the QAM symbol rate on that port only. If the interleave level and mode is set on one QAM channel, the same value is applied to all four QAM channels in a modulator group.

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Caution The default settings should be satisfactory. Realize that varying the settings can result in an increase in packet latency. Always monitor new settings to ensure that resulting BERs are acceptable.

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To configure the FEC interleave level and mode:

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Step 1 Go to QAM Channel View, Interleave parameters section (see Figure 3-47).

Figure 3-47 Setting the FEC Interleave Level and Mode

Step 2 Choose the interleave level.

Values for the FEC interleave level can be level1 or level2. The default value is level2.

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Note If the FEC interleave level is set to level1, the modulation format option of qam256 (256 QAM) is not valid. (See the "Setting the Modulation Format" section.)

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Step 3 Select the value for FEC interleave mode. The default is 6-FEC-I-128-J-4.

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Note The interleave mode can be set only then the interleave level is set to level2 (default).

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Note The Cisco uMG9820 does not support modes 8-FEC-I-128-J-5 and 10-FEC-I-128-J-6.

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Step 4 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Statically Setting Session Timeouts

You can statically set a session timeout for the a single Cisco uMG9850 QAM module, for the entire Cisco Catalyst switch, or for the Cisco uMG9820 QAM Gateway to determine when the session is closed once packets no longer come into the session. You can also set the time, following the absence of packets, at which a loss of signal is reported. Use global timeouts to address the entire switch or QAM gateway, and slot-level timeouts (Cisco Catalyst switches only) to address an entire module in a given slot. The options and parameters are the same in both cases.

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Note When a session is closed, this means that the Cisco uMG9850 has not received any video packets for the given session's UDP port for the period determined by the module-level or switch-level session close timeout. The session no longer exists.

When a session is inactive, this means that the Cisco uMG9850 has not received any video packets for the given session's User Datagram Protocol (UDP) port for the period determined by the global or slot-level timeout signal-loss. The session still exists, and is listed following a show command. If packets start arriving before the timer set by slot-level session-close timeout or global session-close timeout counts down, the session becomes active.

The value for slot-level timeout signal-loss or global timeout signal-loss should always be larger than the value configured for jitter. See Configuring Maximum Jitter for a Session.

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To configure global timeouts:

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Step 1 Go to Chassis View, Global Timers section. (See Figure 3-48.)

Figure 3-48 Setting Global Timers (Cisco Catalyst Switch Chassis View Shown)

Step 2 Enter a value for Session Close Timeout. The range of values is 1 to 1440 minutes. The default value is 10 minutes.

Step 3 Enter a value for Signal Loss Timeout.

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Note For the Cisco Catalyst switch, the range of values is 200 to 10000 milliseconds. The default value is 5000 milliseconds.

For the Cisco uMG9820, the range of values is 500 to10000 milliseconds. The default value is 5000 milliseconds.

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Step 4 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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To configure slot-level timeouts:

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Note This procedure applies to Cisco Catalyst switches only. It does not apply to the Cisco uMG9820 QAM Gateway.

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Step 1 Go to Slot View, Slot Level Timeouts section (see Figure 3-49).

Figure 3-49 Setting Slot-Level Timers

Step 2 Enter a value for Session Close Timeout. The range of values is 1 to 1440 minutes. The default value is 10 minutes.

Step 3 Enter a value for Signal Loss Timeout. The range of values is 200 to 10000 milliseconds. The default value is 5000 milliseconds.

Step 4 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Statically Routing a Range of Program Sessions to a QAM Channel (UDP Port Mapping)

The UDP port number of each program session allows each session to be routed to a designated QAM channel by default. You can overwrite the default routing (which is signaled by the port number) and route a range of program sessions to a QAM channel.

To route a range of program sessions to a QAM channel:

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Step 1 Go to QAM Channel View, Video Sessions Mapping section (see Figure 3-50).

Figure 3-50 Statically Routing a Range of Program Sessions to a QAM Channel

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Note Figure 3-50 displays the default values, indicating that the device is using default UDP port mapping. If you want to use default port mapping, do not change these values. If you want to create a static port map, proceed to Step 2.

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Step 2 Enter maximum number of sessions for this UDP port mapping. The range of values is 2 to 25.

Step 3 Enter the starting UDP port number to be mapped. The range of values is 256 to 65535.

Step 4 Enter the starting output program number to be mapped. The range is 1 to 255.

Step 5 To use only even UDP port numbers, reserving odd numbers for Real-Time Control Protocol (RTCP) for other purposes, set the value to true. False is the default.

Step 6 To clear video session mapping and revert to the session defaults, click on the Clear Video Session Mapping check box.

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Note This returns the device to default port mapping mode. See Configuring the Cisco uMG9850 QAM Module and Cisco uMG9820 QAM Gateway Installation and Configuration Guide for additional infomation on default port mapping.

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Step 7 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Note (Cisco Catalyst switches only) Active video sessions must be stopped while the port map settings are changed. Stop the video sessions by temporarily disabling the VLAN bringing video into the switch. After port maps are changed, the VLAN can be enabled to allow active video streams.

Video session mapping cannot be changed if the Cisco uMG9850 is set to emulation mode.

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Advanced Tasks

Configuring Maximum Jitter for a Session

(Cisco Catalyst switches only) You can set the maximum allowable network jitter (packet latency variation) for a specified UDP port session. This global video setting affects the overall packet latency (at the buffer level) within an entire Cisco uMG9850.

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Note The jitter option sets the size of a dejittering buffer that absorbs the input jitter. This buffer introduces system delay (the time for a packet to enter and leave the Cisco uMG9850). The greater the value of jitter, the greater the delay introduced to the output stream. You can change the size of the dejitter buffer at either the slot or the session level. Changing it at the slot level changes the default value for jitter. (Consequently, for all sessions having the default value for jitter, the jitter value is changed to the new value. For sessions that have nondefault jitter values, their current jitter value is maintained.)

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To configure maximum jitter:

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Step 1 Go to Slot View, Jitter section (see Figure 3-51).

Figure 3-51 Setting the Jitter Specification

Step 2 Set the jitter. The range of values is 0 to 300 milliseconds. The default value is 100 milliseconds.

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Tip When setting the jitter value (the size of the dejitter buffer), take into consideration the network jitter (the inherent jitter introduced at the input of the Cisco uMG9850), and allow for clock tracking. Leave approximately 50 milliseconds for clock tracking. For example, if peak-to-peak network jitter is 100 milliseconds, set the jitter value to 150 milliseconds.

The value for global timeout signal loss or slot-level timeout signal loss should always be larger than the value configured for jitter.

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Step 3 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Setting Up PSI Parameters

You can set up various program-specific information (PSI) parameters, either globally (for the entire switch) or on an individual QAM channel.

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Note If any sessions are active in the switch, new global Program Association Table (PAT) and Program Map Table (PMT) settings are rejected. Active sessions can be suspended while PAT and PMT variables are updated by disabling either the VLAN bringing video into the switch or the Ethernet port assigned to that VLAN.

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Setting PMT and PAT Intervals for the Switch

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Note This procedure applies to Cisco Catalyst switches only. It does not apply to the Cisco uMG9820 QAM Gateway.

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The Program Association Table (PAT) interval sets the interval at which the PAT is distributed for all Cisco uMG9850 modules in the switch. Changing the default rate in this configuration mode overwrites the rate for the switch.

The Program Mapping Table (PMT) interval sets the interval at which the PMT is distributed to all Cisco uMG9850 modules in the switch. Changing the default rate in this configuration mode overwrites the rate for the switch.

To set PMT and PAT intervals for the switch:

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Step 1 Go to Chassis View, Global Timers section (see Figure 3-52).

Figure 3-52 Setting PSI Parameters (Switch) in Chassis View

Step 2 Enter a value for the PAT interval. The range of values is 50 to 450 milliseconds. The default value is 100 milliseconds.

Step 3 Enter a value for the PMT interval. The range of values is 50 to 450 milliseconds. The default value is 100 milliseconds.

Step 4 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Setting PMT and PAT Intervals for a QAM Channel

These parameters set the intervals at which an individual QAM channel distributes the PAT and PMT.

To set these parameters:

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Step 1 Go to QAM Channel View, Timers section. (See Figure 3-53)

Figure 3-53 Setting PSI Parameters

Step 2 Enter a value for the PAT interval. The range of values is 50 to 450 milliseconds. The default value is 100 milliseconds.

Step 3 Enter a value for the PMT interval. The range of values is 50 to 450 milliseconds. The default value is 100 milliseconds.

Step 4 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Setting TSID and NIT-PID Values

At each hub, each QAM channel must have a unique transport stream ID (TSID). The software checks for and guarantees the uniqueness of a TSID within a chassis only. These identifiers specify the TSID used to identify transport stream packets sent on the QAM channel and the packet ID (PID) used to identify Network Information Table (NIT) packets sent on a QAM port.

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Caution It is the responsibility of the operator to avoid TSID conflicts among switches. To see all the TSIDs within a switch, look at the QAM Summary View.

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The PID for the network information table, or NIT-PID, can be configured from the QAM interface. If the NIT-PID is already used as a video, audio, or data PID, the configuration is rejected.

For the transport stream that is to be transmitted over a QAM channel, you must configure the TSID and NIT-PID (network information table packet ID) values for that channel.

To set these parameters:

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Step 1 Go to QAM Channel View, Identifiers section (see Figure 3-54).

Figure 3-54 Setting TSID and NIT-PID Values (in QAM Channel View)

Step 2 Set the value of the Transport Stream ID for the QAM channel. The range of values is 16 to 65535. By default, nonconflicting TSIDs are assigned to all modules in a chassis.

Step 3 Set the value of the Network Information Table packet ID for the QAM channel. The range in values is from 16 to 65536. The default value is 16.

Step 4 Click Apply to save all changes and keep the window open. Click OK to save the changes and close the window. Click Cancel to close the window and discard any changes.

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Enabling or Disabling Ports and QAM Channels

Ports and QAM channels are enabled or disabled by setting the administrative status to up or down, respectively. To activate an Ethernet port, ASI port, or QAM channel, you must set the administrative status to up. If it is necessary to shut down a port or channel, set the administrative Status to down.

•For all types of Ethernet ports, use Ethernet Port View.

•For ASI ports, use ASI Port View.

•For QAM Ports, use QAM Channel View

Figure 3-55 Setting the Administrative Status in ASI Port View

Posted: Mon Oct 18 14:11:50 PDT 2004
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