Switchblade overview, Key hardware components, Chassis models – Allied Telesis SwitchBlade 4000 Series Switch Hardware Reference User Manual
Page 7: Key hardware components chassis models
Hardware Reference
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Adobe Acrobat Reader - Provides a facility for viewing online documentation
in PDF format.
The documents listed here can also be downloaded from the SwitchBlade
.
SwitchBlade Overview
This section provides an introduction to the SwitchBlade’s hardware and
operational characteristics.
Key Hardware Components
SwitchBlade switches are based on a modular design. Several key components
(or modules) are required before the switch will function, these are listed
below:
•
Chassis - Contains and interconnects switch components.
•
Power Supply Units (PSU) - Provides a number of low voltage DC
supplies for the switches’ internal circuitry. Users may specify either
AC or DC power supplies. For some switch configurations two PSUs
may be necessary, plus an additional PSU where N+1 redundancy is
required.
•
Fan tray - Provides cooling fans for the switch and line cards.
•
Line cards - Provides layer 2/3 switching and the physical interfaces for
connecting the cables/fibre. Additional line cards may be added to
provide more ports and more port types than can be supplied by a
single card.
•
Switch controller - Provides advanced switching operations and
configuration ports for the switch. An additional switch controller may
be added to increase speed and provide switch processing redundancy.
The SwitchBlade’s modular design delivers both reliability and scalability.
Dual switch controllers and multiple power supply units provide the
redundancy needed to ensure continuous network service. Line cards
incorporating Ethernet, fast Ethernet, and gigabit Ethernet (with both copper
and fibre interface options) are supported to meet the needs of rapidly
evolving networks.
Chassis Models
SwitchBlade chassis are available in two fundamental types: an eight slot
chassis (AT-SB4108), and a four slot chassis (AT-SB4104).
The eight slot chassis (AT-SB4108) provides space for the following units:
•
two switch controller cards
•
eight line cards
•
three PSUs
•
one AT-SB4151 fan tray
•
one cable manager with four loops