Nortel BayStack 450-12F, BayStack 450-12T, BayStack 450-24T, Baystack 410-24T Specifications

BayStack* 410 and 450 Switches are
stackable Ethernet switches featuring
fail-safe stackability, flexible choices
for high-speed uplinks, and advanced
software features.

BayStack 450 Switches are designed to
provide high-density, high-performance
switching for enterprise wiring closets,
and to provide fail-safe scalability
and advanced traffic management
for rapidly growing networks in
demanding environments.

The BayStack 410-24T Switch is an
affordable, stackable 10BASE-T switch
solution for growing network environments
and features fail-safe stackability with the
BayStack 450 Switches.

BayStack 410 and 450 Switches also
include advanced features such as VLAN
trunking, priority queuing, and IGMP
snooping. BayStack 450 Switches and
Accelar* Routing Switches also provide
network resilience and advanced
management with MultiLink Trunking,
LinkSafe* redundant uplink ports,
RMON on every port, complete
integration into Optivity* network
management software, and easy-to-use
GUI management.

Stackable Up to
8 Units and 224 Ports

Fail-Safe Cascade
Stacking
Architecture

Flexible Uplink Options

BayStack

410 and 450 Switches

Product Brief

BayStack 410 and 450 Switches Data Sheet2

Figure 1: In the unlikely event

of a switch failure,
the stack integrity
is maintained: cascade
signals loop back at
point of failure.

Table 1: Port, MDA, and Stacking Module Slot Configurations

of the BayStack 410 and 450 Switches.

Autosensing

Cascade

10BASE-T/ Stacking

100BASE-TX MDA Module

BayStack Switches Ports Slot Slot

BayStack 450-12T 12 1 1

BayStack 450-24T 24 1 1

Baystack 410-24T 24 (10BASE-T only) 1 1

BayStack 450-12F 12 (100BASE-FX only) 1 1

optimal speed, each switched port also
automatically detects and supports
full-duplex connections to servers,
power-user endstations or other switches
as well as half-duplex connections to legacy
NICs or hubs. The BayStack 410-24T
Switch is a cost-effective, stackable switch
that supports 24 10BASE-T ports.

High-Density Fiber Ports

The BayStack 450-12F Switch has twelve
100BASE-FX mini MT-RJ ports, one
MDA slot, and a cascade module slot.
Up to eight BayStack 450-12F Switches
can be stacked to achieve up to 128
100BASE-FX ports (with 4-port
100BASE-FX MDA on each switch).
The BayStack 450-12F Switch can also
be stacked with the BayStack 410-24T,
450-12T, and 450-24T Switches to
accommodate flexible networks.

Redundant Cascade
Stacking Architecture

Unlike other stacking switches, BayStack
410 and 450 Switches are designed with
a fail-safe cascade stacking architecture
(see Figure 1). Cascade cables connect
up to 8 stacked switches into a self-healing
configuration that protects the stack’s
connectivity by looping connection

As described in Table 1, BayStack 450
Switches are available in 24- and 12-port
configurations, each with a Media
Dependent Adapter (MDA) slot, as well
as a cascade stacking module slot. The
BayStack 410-24T has 24 10BASE-T
ports, one MDA slot, and one cascade
stacking module slot.

Features and Benefits

Flexible High-Speed
Uplink Options

100BASE-FX and 10BASE-T/100BASE­TX MDAs for the BayStack 410 and 450
Switches provide high-speed connections
to the network center. Specifically for the
BayStack 450 Switches, Gigabit Ethernet
and future ATM uplinks provide greater
speed connections to the backbone.

Full Autosensing
on Every Port

Every UTP port on the BayStack 450-12T
and 450-24T Switches are equipped with
autosense technology to automatically
detect and support the speed and mode of
a connected device. As well as automatically
determining whether a connected device
is operating at 10 Mbps or 100 Mbps
and automatically adjusting to the

signals back at a point of failure. In the
unlikely event of a switch failure, all
other units in a stack remain operational
without interruption.

The redundant cascade stacking
architecture is a safer, smarter alternative
to current “matrix” stacking switches,
which suffer from a single point of failure
design flaw — should the base unit fail,
all connectivity to all switches in the
stack is lost.

Wire-speed Throughput

2.5 Gigabit per second (Gbps) switching
fabric and custom switching ASICs
support full 802.1D-compliant MAC
Layer frame forwarding and filtering
across all ports at the peak rate of 3 million
packets per second for the BayStack 450
Switches. The non-blocking architecture
of the BayStack 410-24T Switch allows
packets to be forwarded at 1 million
packets per second.

BayStack 410 and 450 Switches Data Sheet 3

Figure 2: High-density 10/100/1000 switching in the wiring closet,

featuring fail-safe stackability and MultiLink Trunking
for redundant connections to local servers and the
network center.

BayStack
410 & 450 Switches

MultiLink Trunking
across stack for
multi-Gigabit,
load-balancing
connectivity to
local servers and
the network center.

Accelar™
1200 Switch

1 Gbps

100 Mbps

10 Mbps

100 Mbps

100 Mbps

and redundancy. Should one port
connection fail, other connections
within the MultiLink Trunk assume the
full traffic load seamlessly. MultiLink
Trunking also allows servers and critical
resources to be connected to different
switches in the stack to achieve
“Multi-Homing,” whereby link
redundancy is extended to include
unit redundancy, resulting in highly
available critical resources (see Figure 2).

• Each switch includes a Redundant
Power Supply Unit connection.
Should the switch’s built-in power
supply fail, the Nortel Networks RPSU
(sold separately) will automatically
supply power to the switch for
uninterrupted operation.

MultiLink Trunking

Enables grouping of links between the
switch and another switch or a server to
provide higher bandwidth of up to 800
Mbps (when used with 10/100 ports or
100BASE-FX ports) or up to 8 Gigabits

per second (when used with Gigabit
uplink ports on BayStack 450 Switches)
with active redundant links. Trunked
ports can span multiple units of the
stack for fail-safe connectivity to mission­critical servers and the network center.

IGMP Snooping

The BayStack 410 and 450 Switches
feature a new level of efficient IP
MultiCast support by examining
(‘snooping’) all IGMP traffic in hardware
at line rate, and pruning unwanted data
streams from affecting network or
endstation performance.

Enterprise-sized
MAC Address Table

BayStack 410 and 450 Switches support
more than 16,000 MAC addresses per
switch for deployment of large-scale
enterprise networks with many attached
devices and workgroups connected to
each switch. (In a full 802.1Q environment,
32,000 MAC addresses are supported.)

Advanced VLAN Support

Up to 64 port-based or protocol-based
VLANs can be established for each
switch, to extend the broadcast domain
and segment network traffic.

Protocol-based VLANs allow switch ports
to be assigned to a broadcast domain,
based on the protocol information within
the packet. These VLANs can localize
broadcast traffic and assure that the
specified protocol type packets are sent
only to the protocol-based VLAN ports.

802.1Q VLAN Trunking

VLAN trunking is supported on every
port of the switch, allowing efficient
means of transporting broadcast domains
across switches.

802.1p Priority Queuing

Standards-based priority queuing
enables prioritization of multimedia or
latency-sensitive traffic, making possible
integration of voice, video, and data
within the same network.

Fail-Safe Design Features

• Redundant cascade stacking architecture.

• Each unit in the stack has a full copy of
the stack configuration so in the unlikely
event of any unit failure, operation of
the stack continues without affecting
application connectivity.

• Gigabit uplinks (for BayStack 450
Switches only) feature LinkSafe, which
provides two different physical fiber
connectors for each Gigabit uplink.
Upon primary path failure, the traffic
is diverted to the redundant path
in microseconds, protecting critical
Gigabit Ethernet connections to
servers or the network center.

• MultiLink Trunking can be implemented
across the stack, where connections
between individual devices (for example,
between a BayStack 450 Switch and an
Accelar 1200 Routing Switch) can be
aggregated for both higher bandwidth