Black Box ServerSwitch Multi KV162RA, Руководство пользователя

Страница: 55 / 160

SERVSWITCH™ MULTI
54
6.1 Placing the ServSwitch Multi
NOTE
Here and elsewhere in this chapter you will see diagrams in which ServSwitch Multis
units are identified as “Switch 0.” You will notice that all such Switches have Receive
Cards installed in them, but no Transmit Cards. Do
not set the address of any unit with
a Transmit Card installed in it to zero; your system will not work. The address zero is
reserved as the operating address for all ServSwitch Multis in which no Transmit
Cards are installed—unless a firmware upgrade has to be done (see
Section 8.13 and
the entry for “CHASSIS=n” in Section 8.15 ).
There are two basic types of expansion configurations for the ServSwitch Multi: the “star” and the “daisychain.”
In the star configuration, additional Switches are all attached to a central “hub” ServSwitch Multi, as shown in
Figure 6-2. In the daisychain configuration, additional Switches are attached in a line: The first Switch is
connected to the second, which in turn is connected to the third, and so on, as shown in Figure 6-3. (Note that
in both Figure 6-2 and Figure 6-3, the users on Switch 0 can access any computer attached to any of the four
Switches in the system.) The star configuration is the more common of these two approaches and is the
recommended setup for most applications.
Figure 6-2. A sample “star” configuration.
Figure 6-3. A sample “daisychain.”
C
P
U X
M
T
C
P
U C
P
U
C
P
U X
M
T
C
P
U
X
M
T
C
P
U
C
P
U R
C
V U
S
R C
P
U
U
S
R X
M
T
U
S
R X
M
T
U
S
R U
S
R U
S
R X
M
T
U
S
R U
S
R U
S
R
R
C
V R
C
V U
S
R C
P
U R
C
V
SWITCH 0
SWITCH 1
SWITCH 2 SWITCH 3
SWITCH 0
SWITCH 1
SWITCH 2
SWITCH 3