Nortel Networks 450 - Manual (Page 48)

Using the BayStack 450 10/100/1000 Series Switch
1-22 302401-D Rev 00
Fail-Safe Stack Application
Figure 1-9 shows an example of eight BayStack 450 switches that are stacked
together as a single managed unit. If any single unit in the stack fails, the
remaining stack remains operational, without interruption.
As shown in Figure 1-9 , the Accelar 1100 switch is used as a backbone switch,
connecting to the BayStack 450 switch with an optional gigabit (1000BASE-SX)
MDA for maximum bandwidth. This configuration uses optional BayStack
400-ST1 Cascade Modules to connect the switches in the fail-safe stack.
For an overview of the fail-safe stacking feature that is available for the BayStack
450 switches, see
“Stack Operation ” following this section.
Figure 1-9. Fail-Safe Stack Example
CPU PS1 PS2 FAN
F
BayStack 450-24T switches
Key
100 Mb/s
1000 Mb/s
Up to
24 users
Up to
28 users
Up to
28 users
Up to
28 users
Up to
28 users
Up to
28 users
Up to
28 users
Up to
28 users
BS45008A
Accelar switch
kombk.book Page 22 Tuesday, June 29, 1999 3:25 PM