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236 ZENworks for Desktops 3.2 Administration Guide

Novell Confidential Manual (99a) 11 September 2003

Session (Multicast) Mode

Use the Session (Multicast) mode to take an image of one computer and lay it down on multiple

other computers simultaneously over the network in a single operation without NDS or ZfD server

involvement. For more information, see Chapter 18, “Multicasting Images,” on page 215.

For multicasting to work, each participating computer must boot from an imaging device and run

the imaging engine in this mode, as explained below. The computer from which the image is taken

is called the master, and the computers that receive the image are called participants.

NOTE: For multicasting to work properly, the routers and switches on the network must have multicast

features configured. Otherwise, multicast packets might not be routed properly.

To use the Session (Multicast) mode:

1 Enter img to display a menu > select Multicast Session > select Master or Client. Fill in the

Session Name, Number of Clients, and Timeout fields. See the table below for details.

Enter the following:

img session name [master|client] [clients=count [t=minutes]]

zisd List the data currently stored in the image-safe area on the computer. The

items that comprise this data are listed in “Imaging Agent (ZISWIN.EXE)”

on page 220.

In addition to the image-safe data, the last base image that was laid down

on the computer is also listed.

Example Explanation

img info Lists the detected hardware devices on the computer.

img info zisd Lists the ZfD image-safe data currently stored on the computer and the last

base image that was laid down.

Parameter Specifies

name The name of the multicast session. Each computer joining the session uses

the same value for this parameter. You can specify any multicast session,

including one that originates from the proxy server (as long as you specify

the session name used by the proxy server).

NOTE: The name must be unique among concurrent multicast sessions. It

is hashed by the imaging engine to produce a Class D (temporary) IP

address for the multicast session. To facilitate troubleshooting (wire sniffing),

all ZfD imaging multicast addresses start with 231. For example, the session

name

doug produces the multicast address 231.139.79.72.

master|client That this computer is the session master or a session client.

If you omit this parameter, the imaging engine waits for a user on one of the

computers to press

m to designate that computer as the master.

Parameter Specifies to

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 41 42

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