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Imaging Utilities and Options 499

Novell Confidential Manual (99a) 28 October 2003

Session (Multicast) Mode

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

other computers simultaneously over the network in a single operation without NDS/eDirectory or

ZfD server involvement. For more information, see Chapter 46, “Multicasting Images,” on

page 475.

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. (Sometimes

participants are referred to as slaves.) Starting in ZfD 4, you can start the multicast session from

the imaging server. If you start the session this way, you specify an image file for multicasting

rather than a workstation as the session master.

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 480.

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

Parameter Specifies

name The name of the multicast session. Each computer joining the session uses the same value for this parameter.

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 Workstation 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, or for the imaging session to be started from the imaging server by selecting

Manually Start Multicast > providing the required information > selecting Yes.

Parameter Specifies to

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Abocom RE450 Guía de instalación Pagina 63