Specifications

7
• Avoid QoS provisioning errors
• Centrally manage DSCP and 802.1p to
queue mapping tables
• Save time provisioning the network;
thousands of CLI or Web transactions
reduced to a few simple actions
The BayStack 460 is planned to be
supported in OPS version 3.1 (future
release).
Newer Gigabit Ethernet MDAs
The BayStack 460 Switch supports the latest
Gigabit MDAs. Each of these MDAs will
support 8 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
wavelength 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 certain speeds 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 BayStack 460 to the network core,
yielding the most efficient bandwidth utiliza-
tion. The primary customers for rate shaping
are service providers or carrier customers that
are selling Ethernet in place of traditional
Frame Relay, ISDN, or ATM WAN access
solutions, and providing end-to-end
Ethernet service for simplicity. Some
enterprise 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 telecommunica-
tions, Nortel Networks is uniquely positioned
to help your business reduce costs by combin-
ing 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.