Lenovo Secure Managed Client Bedienungsanleitung PDF herunterladen (Seite 15)

For more information on Active Directory, go to the following Web address:

http://www.microsoft.com/windowsserver2003/technologies/

directory/activedirectory/default.mspx

iSCSI boot

Secure Managed Client conforms to the iSCSI standard protocol. Make sure that

port 3260 is not blocked so as not to block iSCSI traffic. For more information, see

www.ietf.org

The initial operating system (the boot manager) is loaded into the client through

an iSCSI boot by the NIC. The Dynamic Host Configuration Protocol (DHCP)

server must be configured to tell the NIC which iSCSI target to load. The DHCP

server conveys the IP address, the target name, and the Logical Unit Number

(LUN) number in the boot option of the DHCP configuration. The specific syntax

and method (or syntax or method) depends on the kind of DHCP server used in

the customer environment and is, therefore, beyond the scope of this book.

An iSCSI target is a string or tag that is recognized by the iSCSI target service as

mapping to a file or device. In the case of Secure Managed Client, the iSCSI service

runs in the storage array and the target (or tag) is generated by a combination of

the storage array and the LANDesk server. The prefix of the target name is

generated by the storage array so that it is guaranteed to be unique. The remainder

of the name is generated by LANDesk and is usually smcboot.

To find the boot manager target name, perform an iSCSI discovery to the storage

array IP address. This will return a list of targets in the storage array. One of these

targets should be the smcboot target. The DHCP server should set the target name

in the iSCSI boot configuration to be this name (including the storage

array-generated unique prefix). If the IP address is statically assigned, the LUN

will normally be 0.

Capacity

The general activity generated by Secure Managed Client is relatively small, but

the network should be designed for peak capacity. While peak access on different

systems will rarely occur at the same time, there may be times when several

systems are booting at the same time. The network topology should be created

with these times, known as boot storms, in mind.

A single 100 Mb line is able to support a single user but as multiple clients added,

the capacity of the 100 Mb line will be exceeded and you might needa1Gbline.

A 1 Gb line can carry the peak traffic of 20 to 25 clients. More clients will require

multiple lines.

Link aggregation (Bonding)

If the number of clients through a particular link exceeds 20 to 25, then multiple

physical links can be combined into a single logical link with greater capacity. Link

aggregation is in accordance with ISO 802.3AD but varies by switch manufacturer.

In the Secure Managed Client solution, a 6-wide aggregate link is used between the

storage array and the main switch. This allows the storage array to have a single

IP address and have enough network capacity for up to 100 clients.

Chapter 3. Networking considerations 7

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