Features And Benefits - Nortel BayStack 420-24T Specifications

Every UTP port on the BayStack 420-24T
Switch is equipped with autosensing
technology to automatically detect and
support the speed and mode of a connected
device. Determining whether a connected
device is operating at 10 Mbps or 100
Mbps, and automatically adjusting to the
optimal speed, each of the 24 switched
ports 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.
Figure 1: The plug and play
architecture allows
easy expansion, and
management as a
single unit.
2
BayStack 420 Switch saves money and
time if it needs to be connected to a hub
or another switch. Normally, you need
a cross-over cable for this purpose, but
with BayStack 420 Switch you can use an
inexpensive straight-through cable or a
cross-over cable. When a cable is connected
to a port on the BayStack 420 Switch, the
switch port automatically detects the
polarity of the cable and configures itself.
Also, this feature makes configuration
easier as it eliminates the need for an
MDI/MDIX port and any port may be
used for connection to a hub or switch.
The plug and play cascade stacking
architecture allows you to connect up
to 8 BayStack 420-24T Switches with
stack cables (see Figure 1) into a single
manageable unit of up to 192 ports.
Built-in Gigabit stacking connectors
provide easy connections to other switches
in the stack and save money by not
requiring additional cascade modules.
Cascading bandwith is 1Gbps. The scalable
architecture is designed to protect your
network investment, as your business
needs change or grow, and allows you
to cost-effectively buy as you grow.
A 12.8 Gigabit per second (Gbps)
switching fabric and ASICS support full
802.1D-compliant MAC Layer frame
forwarding and filtering across all ports
at wirespeed performance, with a peak
forwarding rate of 5.1 million packets
per second with no packet loss.
BayStack 420-24T Switch offers a built-in
GBIC (Gigabit Interface Converter) slot
in the front of the unit that provides
high-speed connection to backbone
switches or servers. A variety of GBIC
module options gives you flexibility in
fiber interfaces to connect to distant
servers or a larger network, including
SX, LX, XD (50 km) and ZX (70 km)
for long haul connectivity.
MultiLink Trunking (MLT) enables
grouping of links between the switch
and another switch or a server to provide
higher bandwidth of up to 800 Mbps.
The BayStack 420-24T Switch supports
up to 6 MLTs per switch or per stack
with up to 4 10/100 ports per MLT.
Up to 32 port-based VLANs can be
established for each switch, to extend the
broadcast domain and segment network
traffic for higher network efficiency.
802.1Q VLAN Tagging is supported on
every port of the switch, allowing efficient
means of transporting broadcast domains
across switches. VLANs reduce adminis-
tration costs by simplifying network
moves, adds, and changes.
The BayStack 420-24T Switch supports
up to 8,000 MAC addresses to provide
ample scalability for growing networks to
accommodate many attached devices and
workgroups connected to each switch.