Nortel 450-24t 用户指南
Using the BayStack 450 10/100/1000 Series Switch
1-12
309978-D Rev 01
Redundant Power Supply Unit (RPSU) Connector
The RPSU connector allows you to connect a backup power supply unit to the
switch. Nortel Networks provides an (optional) high-power redundant power
supply unit (HRPSU) for this purpose. The HRPSU is a hot-swappable power
supply unit that provides uninterrupted operation to up to four BayStack 450
switches in the event that any of the switch power supplies fail.
switch. Nortel Networks provides an (optional) high-power redundant power
supply unit (HRPSU) for this purpose. The HRPSU is a hot-swappable power
supply unit that provides uninterrupted operation to up to four BayStack 450
switches in the event that any of the switch power supplies fail.
Nortel Networks provides the HRPSU power rack (Order No. AA0002001) with
four slots for power supply modules (Order No. AA0005003). Each HRPSU can
support up to four BayStack 450 switches. Installation instructions are provided
with the HRPSU (refer to Installing and Maintaining the HRPSU (Part number
114312-D).
four slots for power supply modules (Order No. AA0005003). Each HRPSU can
support up to four BayStack 450 switches. Installation instructions are provided
with the HRPSU (refer to Installing and Maintaining the HRPSU (Part number
114312-D).
Contact your Nortel Networks sales representative for more information about the
HRPSU.
HRPSU.
Cascade Module Slot
The Cascade Module slot allows you to attach an optional BayStack 400-ST1
Cascade Module to the switch (see “Stack Operation” on page 1-39).
Cascade Module to the switch (see “Stack Operation” on page 1-39).
You can connect up to eight BayStack 450 switches to form a redundant stack
configuration. BayStack 450 switches use a fail-safe cascade stacking architecture
which, in the unlikely event of a switch failure, maintains the integrity of the
remaining stack: all signals are looped back at the point of failure. Because each
unit in the stack has a full copy of the stack configuration, operation of the stack
continues without affecting application connectivity.
configuration. BayStack 450 switches use a fail-safe cascade stacking architecture
which, in the unlikely event of a switch failure, maintains the integrity of the
remaining stack: all signals are looped back at the point of failure. Because each
unit in the stack has a full copy of the stack configuration, operation of the stack
continues without affecting application connectivity.
Any mix of up to eight BayStack 450 switches, BayStack 410-24T switches, and
the Business Policy Switch 2000 can be stacked to provide a total of 224 ports
when all MDA slots are configured with the maximum port availability (certain
restrictions apply, see “Stack Operation on page 1-39).
the Business Policy Switch 2000 can be stacked to provide a total of 224 ports
when all MDA slots are configured with the maximum port availability (certain
restrictions apply, see “Stack Operation on page 1-39).
Installation instructions are provided with each BayStack 400-ST1 Cascade
Module (see Installing the BayStack 400-ST1 Cascade Module).
Module (see Installing the BayStack 400-ST1 Cascade Module).
See your Nortel Networks sales representative for ordering information.