Switch User Manual

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NNSCs are also supported on the Passport
8600 Routing Switch, BayStack 470
Switches, and the BayStack Business
Policy Switch.
Newer Gigabit Ethernet MDAs
The BayStack 460 Switch supports the
latest Gigabit MDAs. Each of these MDAs
will support eight output queues and
support traffic shaping. The three MDAs
are:
• BPS2000-1GT 1-port 1000BASE-TX
MDA
• BPS2000-2GT 2-port 1000BASE-TX
MDA
• BPS2000-2GE 2-port Small Form Factor
GBIC MDA
With the dual-port small form factor GBIC
MDA, you can plug up to two small form
factor pluggable GBICs. There are three
types of small form factor pluggable GBICs
to choose from:
• 1-port 1000BASE-SX Small Form Factor
GBIC (LC connector)
• 1-port 1000BASE-SX Small Form Factor
GBIC (MT-RJ connector)
• 1-port 1000BASE-LX Small Form Factor
GBIC (LC connector)
New CWDM small form factor pluggable
GBICs can also be used with the two-port
small form factor GBIC MDA. With
CWDM, a customer can dramatically
increase the bandwidth supported over a
single fiber. Instead of 1 Gigabit per fiber
connection with a CWDM GBIC, eight
wavelengths can be supported per fiber.
In other words, eight gigabits of traffic can
be supported across one single mode fiber.
There are eight different wavelength GBIC
options for 40 km and eight different wave-
length GBIC options for 70 km.
Traffic policing
Traffic policing enables provisioning of
different levels of service by limiting traffic
throughput at the ingress (incoming) port
of the BayStack 460 Switch. For example,
if a port is set to a certain speed such as
10 Mbps, all traffic under 10 Mbps on that
port will pass, and traffic that exceeds 10
Mbps on that same port is dropped. Service
providers will find this especially useful to
control bandwidth to their customers.
IP traffic shaping
IP traffic shaping offers the ability to
smooth IP classified traffic from the Gigabit
uplink ports of a single BayStack 460
Switch. While traffic policing is needed to
provide different levels of service to data
streams on the ingress ports, traffic shaping
is needed to smooth the traffic on the
uplink connection from the BayStack 460
Switch to the network core, yielding the
most efficient bandwidth utilization.
Service providers or carriers utilize this
feature when they are selling Ethernet in
place of traditional Frame Relay, ISDN, or
ATM WAN access solutions. Some enter-
prise customers use traffic shaping as a
mechanism to limit bandwidth without
having to swap out physical interfaces,
leaving them room to grow.
Summary
With more than 100 years in telecommu-
nications, Nortel Networks is uniquely
positioned to help your business reduce
costs by combining voice and data into an
integrated system. Why take a chance on
a vendor that only understands part of
the equation? Let us show you how the
BayStack 460 Switch—along with other
Nortel Networks products—can increase
your profitability, streamline your business
operations, increase productivity, and help
you gain the competitive edge.