Nortel BayStack 460-24T-PWR Reference guide

resiliency, with the addition of Power over
Ethernet capability. It enables enterprise
customers to power devices while maintain-
ing connectivity to standard 10/100 Mbps
Ethernet devices such as PCs and servers.
All 24 ports of the BayStack 460 Switch
can be powered.
BoSS v3.0 (BayStack operating system
Switching Software) allows the BayStack
460 Switch to stack with other BayStack
switches. BoSS also simplifies software
upgrades with a single image for different
BayStack switches.
Part of the successful BayStack* family,
Nortel Networks BayStack 460-24T-PWR
Power over Ethernet Switch is a resilient,
secure stackable switch with Power over
Ethernet (PoE) capabilities to IEEE P802.3af
compliant devices such as IP phones, wire-
less access points, network cameras, security
and lighting devices, and access control
devices (badge readers) (Figure 1). The
switch has all of the features of the BayStack
Business Policy Switch such as advanced
Quality of Service (QoS) and high-
BayStack 460-24T-PWR
Power over Ethernet Switch
Nortel Networks
Figure 1: The BayStack 460-24T-PWR
Power over Ethernet Switch
BayStack 460-24T-PWR Power
over Ethernet Switch
•Power to IP phones, wireless access points,
network cameras, security and lighting
devices, and access control devices
•Provides power to all 24 ports
•IEEE P802.3af compliant to power multiple
vendors’ equipment
•Automatically provides power to a detected
device
•Enables data and power to be transmitted
over a single cable without using power
outlets
•Flexible stacking across different BayStack
switches—a stack is managed as a single
entity with a single IP address
•Simple software upgrades with single
image for different switches
•Network availability with QoS features
•Fail-safe stacking design assures
continuous uptime
•Resilient connectivity for minimal
network downtime
•Secure access and data traffic protection
Product Brief

High-density Power over
Ethernet switch
The BayStack 460-24T-PWR Switch has
24 10/100 Mbps autosensing ports, one
MDA (Media Dependent Adapter) slot
for uplink connectivity, and one cascade
module slot for stacking. Up to eight
switches can be stacked to achieve up to
224 10/100 ports (using 4-port 10/100
Mbps MDA per switch) that can be easily
managed as a single unit. The 2.5 Gbps
cascading bandwidth offers dedicated band-
width between switches without sacrificing
any uplink ports. The uplink ports can be
used for connections to backbone switches
such as the Passport 8600 Switch.
Full autosensing on every port
Every UTP port on the BayStack 460
Switch is equipped with autosensing tech-
nology to automatically detect and support
the speed and mode of a connected device.
The ports determine whether a connected
device is operating at 10 Mbps or 100
Mbps, and automatically adjust to the
optimal speed. Each of the switched ports
can also automatically detect and support
full-duplex connections to servers, power-
user endstations or other switches, as well
as half-duplex connections to legacy NICs
or hubs.
IEEE P802.3af compliant
The BayStack 460-24T-PWR Switch is
IEEE P802.3af compliant. It can provide
Power over Ethernet to any IEEE P802.3af
compliant device such as IP phones, wire-
less access points, network cameras, security
and lighting devices, and access control
devices. The benefit of being interoperable
with standards-based equipment means
that customers are not forced to tie them-
selves to any one vendor, as the switch has
the flexibility to power multiple vendors’
devices. It can supply power up to 15.4
Watts per port, which meets the IEEE
P802.3af standard. This is more than
sufficient to power most devices.
Auto discovery feature
The BayStack 460-24T-PWR Switch auto-
matically recognizes the connection of a
device and immediately sends power to it.
This automatic capability ensures fast
connectivity without manual intervention.
Dynamic power management
Each port can be configured to limit the
power delivered to a device. Each port can
also be configured for power priority
level—Low, High, and Critical. On the
switch, total available power is monitored.
In the case where all available power is fully
utilized, the switch may turn off lower prior-
ity ports and turn on higher priority ports.
Active circuit protection
The BayStack 460 Switch can automatically
disable a port if there is a short. All the other
ports on the switch will remain active and
will not be affected by the disabled port.
Plug-n-play IP telephony
switching
The BayStack 460 Switch provides simpli-
fied Web-based configurations on data and
power properties. The graphical user inter-
faces make it simple to set up data and
power configurations.
Convenience of a single cable
With the BayStack 460 Switch, data and
power can be transmitted over one cable
without using a power outlet. There is no
need for a separate cable connecting the
device to a power outlet.
Significant space and
cost savings
Traditionally, a mid-span patch panel
device connects to a standard Ethernet
switch and the device sends power over
standard UTP cat 5 cable; in essence, two
units are needed for Power over Ethernet
capability. In contrast, the BayStack 460
Switch integrates standard LAN switch
functionality with the power over UTP
cable capability of a mid-span patch panel
into one unit. This can result in significant
cost and space savings.
BoSS v3.0 (BayStack operating
system Switching Software)
With the release of BoSS v3.0, Nortel
Networks becomes the first vendor to offer
a single software image that can support
four different switch types: BayStack 460-
24T-PWR, BayStack Business Policy
Switch, BayStack 470-48T, and BayStack
2
Figure 2: In the unlikely event of a
switch failure, the stack
integrity is maintained:
cascade signals loop back
at point of failure.
Unit 8
Unit 7
Unit 6
Unit 5
Unit 4
Unit 3
Unit 2
Unit 1
Table 1: Stacking matrix
BayStack BayStack BayStack BayStack BayStack
460-24T-PWR 470-24T 470-48T Business 450
Policy Switch
BayStack 460-24T-PWR Yes Yes Yes Yes Yes
with BoSS v3.0
BayStack 470-24T Yes Yes Yes Yes Yes
with BoSS v3.0
BayStack 470-48T Yes Yes Yes Yes No
with BoSS v3.0
BayStack Business Policy Yes Yes Yes Yes Yes
Switch with BoSS v3.0
BayStack 450* Yes Yes No Yes Yes
Note: *BayStack 450 must have BayStack 450 software v4.2 or higher.

BayStack 460-24T-PWR Switch Stack
Passport 8600 Switch
BayStack 460-24T-PWR Switch Stack
Passport 8600 Switch
Interswitch Trunk
All ports active
Figure 4: Split Multi-Link Trunking (SMLT)
Figure 3: Distributed Multi-Link Trunking
across stack for higher bandwidth
and fault tolerance
Multi-Gigabit
load-balancing
and failover
protection for
uninterrupted
access to the
network center
BayStack 460-24T-PWR Switch Stack
Passport 8600 Switch Server
470-24T. BoSS simplifies network opera-
tions and provides the flexibility of stacking
different switches in the same stack.
Simplified network operations
BoSS simplifies network operations by
reducing the number of steps required for
switch software updates. With BoSS, only a
single image needs to be downloaded from
Nortel Networks Web site for four different
switch types. Loading the image to different
switches is also considerably simplified. The
image is loaded only to the base unit of the
stack which automatically loads it to other
switches in the stack. Finally, keeping track
of the version numbers is much easier as only
one version number needs to be remembered.
Flexible stacking with other
BayStack Switches
Using BoSS, the BayStack 460 Switch is
able to stack with any combination of
BayStack switches.
–BayStack 460-24T-PWR Switch can
be stacked with any combination of
BayStack 470-48T, BayStack 470-24T,
BayStack Business Policy Switch, and
BayStack 450.
Using BoSS v3.0, a maximum of eight
switches can be stacked in any valid
combination (Table 1).
It should be noted that the BayStack 470-48T
cannot be stacked with the BayStack 450.
Fail-safe stacking and resiliency
A key differentiation for the BayStack 460
Switch is its resilient stacking feature. The
BayStack 460 Switch can stack up to eight
units with a cascade stacking design, assur-
ing continuous uptime even if a switch in
the stack should fail. A loop-back—or
redundant cascade cable—is used to seam-
lessly connect the entire stack to eliminate
any single point of failure (Figure 2).
Multi-Link Trunking
Multi-Link Trunking (MLT) enables
grouping of links between the BayStack
460 Switch and another switch or a server
to provide greater bandwidth with active
redundant links.
10/100 ports) or up to 8 Gbps (when used
with Gigabit uplink ports) with active
redundant links in one trunk. Up to six
trunks are supported per switch or stack.
Split Multi-Link Trunking (SMLT) elimi-
nates single points of failure and allows
wiring closet switches, such as the BayStack
460, to have multiple active connections
to the network core. The BayStack 460
Switch’s ability to have multiple connec-
tions to a Passport 8600 network core
allows customers to double network band-
width with no extra investment. The
Passport 8600 provides a self-healing
network which delivers the reliability and
availability required by today’s mission-
critical applications. By combining the
reliability of the Passport 8600 with the
resilient trunking features of the BayStack
460 (DMLT, MLT, etc.), Nortel Networks
has created the next generation of flexible
networking solutions (Figure 4).
With Nortel Networks unique Distributed
Multi-Link Trunking (DMLT) feature,
trunked ports can span multiple units of
the stack for fail-safe connectivity to
mission-critical servers and the network
center (Figure 3). This can provide band-
width of up to 800 Mbps (when used with
3

Common look and feel
All BayStack switches, including the
BayStack 460 Switch, have a common
“look and feel” which reduces training
costs. This allows the switches to be
managed in a similar fashion via a broad set
of management tools. These tools include
Web, Command Line Interface (CLI),
Java™-based Device Manager (JDM),
Optivity* Network Management System
(NMS), Optivity Switch Manager (OSM),
and Optivity Policy Services (OPS).
End-to-end IP telephony
The BayStack 460 Switch provides enter-
prises with another option for end-to-end
deployment of IP telephony. Succession
1000, Business Communications Manager,
Meridian, and BayStack all provide the
choices that allow enterprises—from small
and medium businesses to large campus
infrastructures—to deploy the solution that
is right for them and offers the flexibility to
implement infrastructure changes at their
own pace. Figure 5 depicts an example of a
small- to mid-sized enterprise solution with
the BayStack 460 Switch. Figure 6 shows
an example of a large enterprise solution.
MAC addresses
BayStack 460 Switches support up to
16,000 MAC addresses per switch or stack
for deployment of large-scale enterprise
networks with many attached devices and
workgroups, allowing for scalability and
cost-effectiveness.
VLAN support
Up to 256 port-based VLANs can be config-
ured per individual switch or per stack to
extend the broadcast domain and segment
network traffic. The 256 VLANs can be
spread among port-based and MAC source
address-based VLANs (up to a maximum of
48 MAC source address-based VLANs). The
256 VLANs can be on a standalone switch or
across a stack. 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.
Shared VLAN (SVL) and individual VLAN
(IVL) learning is supported. With SVL
support, all VLANs in the switch share the
same forwarding database. IVL allows indi-
vidual VLANs to have separate forwarding
databases within the switch, and it allows the
switch to handle duplicate MAC addresses if
the addresses are in different VLANs.
4
Figure 5: Small to medium enterprise solution
Business Communications
Manager
BayStack 460 Stack
Business Series
Terminals
Servers Desktop
users
802.11
Wireless
LAN
i2004
Standard LAN
Power over Ethernet
Power
10/100
Mbps
Net
camera
Figure 6: Large enterprise solution
Passport 8600
BayStack 460 Stack
Succession
1000
CallPilot 2.0 Desktop
users
802.11
Wireless
LAN
i2004
Standard LAN
Power over Ethernet
Servers
Analog
Phones
Succession Media
Gateway
Power
10/100
Mbps
Distributed Multi-Link Trunking
Net
camera

5
IGMP snooping
The BayStack 460 Switch features IP
Multicast support by examining (‘snoop-
ing’) all Internet Group Multicast Protocol
(IGMP) traffic in hardware at line rate, and
filtering out (dropping) unwanted IGMP
packets such as PING from disrupting
network or end-station performance.
Multiple spanning tree
protocol groups
The BayStack 460 Switch supports
multiple spanning tree groups (STGs). It
supports a maximum of eight STGs, either
all in one standalone switch or across a
stack consisting solely of BayStack 460
Switches. Multiple STGs provide multiple
data paths, which can be used for load
balancing and redundancy.
Nortel Networks Command
Line Interface (NNCLI)
The NNCLI is used to automate general
management and configuration of BayStack
460 Switches. The NNCLI is used through
a TELNET session or through the serial
port on the console.
ASCII configuration file
The BayStack 460 Switch can download a
user-editable ASCII configuration file from
a Trivial File Transfer Protocol (TFTP)
server. The ASCII configuration file can
be loaded automatically at boot time or on
demand using the management systems
(console menus or CLI). Once down-
loaded, the configuration file automatically
configures the switch or stack according to
the NNCLI commands in the file. This
feature allows the flexibility of creating
command configuration files that can be
used on several switches or stacks with
minor modifications.
Spanning Tree Protocol
Built-in support for Spanning Tree Protocol
(IEEE 802.1D) detects and eliminates
logical loops in the network. When multi-
ple paths exist, the switch will automatically
place some ports on standby to form a
network with the most efficient traffic
pathways, avoiding the continual looping
of frames.
Port mirroring
The port mirroring feature (sometimes
referred to as ‘conversation steering’) allows
the network administrator to designate a
single switch port as a traffic monitor for a
specified port. Port mirroring copies
packets flowing into a specified port and
sends the replicated data to the mirrored
port for in-depth analysis of switched traffic
patterns to troubleshoot problems and opti-
mize network configurations. Additionally,
an external probe device can be attached to
the designated monitor port.
Advanced management
features
BootP and TFTP support allows centralized
switch IP address assignment, software
upgrades, and SNMP agent updates over
the network. The RADIUS-based security
feature uses the RADIUS (Remote
Authentication Dial-In User Services)
protocol to authenticate local console
and TELNET logins.
LED indicators
The LED indicators on the front panel
make it easy to monitor the switch and port
status and help in isolating and diagnosing
switch problems.
Enhanced security
The BayStack 460 Switch offers the highest
level of security with features including
Secure Shell (SSH) version 2, IEEE 802.1x
based security [also known as Extensible
Authentication Protocol (EAP)] assignment
of proper VLAN and priority, Simple
Network Management Protocol (SNMPv3),
MAC-address based security, and RADIUS
authentication.
SSHv2 supports strong authentication and
encrypted communications. It allows you to
log into the switch from an SSH client and
perform a secure TELNET session using
CLI commands. This feature is ideal for
security conscious customers such as federal
governments.
For added security, BayStack 460 Switch
supports the 802.1x-based security feature,
(EAP). Based on the IEEE 802.1x standard,
EAP limits access to the network based on
user credentials. A user is required to
“login” to the network using a username/
password; the user database is maintained
on the authentication server (not the
switch). EAP prevents network connectivity
without password authorization for added
security and control in physically non-
secure areas. It is used where the network is
not 100 percent physically secure or where
physical security needs enhancement, for
example, banks, trading rooms, or class-
room training facilities. EAP supports client
access to the network and interoperates
with Microsoft™Windows XP and other
compliant 802.1x clients.
SNMPv3 provides user authentication and
data encryption for higher security. It also
offers secure configuration and monitoring.

6
IP Manager List limits access to the
management features of the BayStack 460
Switch by a defined list of IP addresses or
IP address ranges/subnets, providing greater
network security and manageability.
BaySecure* MAC-address based security
allows authentication of all access, not only
to the switches for management and config-
urations, but also access to the infrastructure
through these switches. This software feature
limits access to only network authorized
and trusted personnel, including full track-
ing of network connections. With BaySecure,
network access is granted or denied via
proper MAC-address identification (up to
a maximum of 448).
The RADIUS-based security feature allows
you to set up network access control to
authenticate local console and Telnet logins.
Power sharing options
The BayStack 460 Switch can be used in
conjunction with the BayStack 10 PSU or
NES (Network Energy Source) DC Power
System from Invensys (www.intergynes.com)
to create a load sharing, RPSU, or UPS solution.
Load sharing
The BayStack 460 Switch provides up to
200 watts to power the devices. With the
addition of a BayStack 10 PSU, up to 235
watts of total power can be supplied to
devices. A 2-pin cable is required to connect
from the BayStack 460 to the BayStack 10
PSU (AL2018008). With the addition of
NES DC power system, up to 370 watts of
total power can be supplied to devices.
Redundant power supply unit support
Using a BayStack 10 PSU will provide up
to 75 watts of power to be supplied to
devices in case the power supply of the
BayStack 460 fails. A 2-pin cable is required
to connect from the BayStack 460 to the
BayStack 10 PSU (AL2018008). Using
NES DC power system, up to 200 watts of
power can be supplied to devices in case the
power supply of the BayStack 460 fails.
Uninterruptible power supply support
Using a BayStack 10 PSU will provide up
to 75 watts of power to be supplied to
devices in case there is an electrical outage.
Up to 15 minutes of battery life is provided
(this will vary depending on the amount of
modules installed on the BayStack 10).
Using NES DC power system, up to 200
watts of power can be supplied to devices in
case there is an electrical outage. With NES
system, up to 8 hours of battery life is
provided (this will vary depending on the
amount of modules on the NES unit).
NES ordering information
For more product information on NES DC
power systems, please visit their Web site at:
www.intergynes.com. For information on
how to purchase NES DC power system,
please e-mail Invensys at:
[e-mail]
Network management
Web-based management
Web-based network management makes
managing the BayStack 460 Switch stack
easy with a Web browser. Summary, config-
uration, fault, statistics, application,
administration, and support pages can be
provided for the entire stack. Traffic classifi-
cation and prioritization can be set via the
Web-based QoS Wizard and advanced
configuration tool. Real-time sampling
provides up-to-date LED statistical infor-
mation for stacked units. The Web interface
also allows for static configuration of
numerous parameters of the device. Plus,
the stack can be managed as a single entity
with one IP address.
On-box management
Network management begins with the
device. The BayStack 460 Switch supports
four groups of Remote Monitoring
(RMON) on all ports and is SNMPv3
compliant. The four groups of RMON are
Alarms, Events, History, and Statistics.
RMON2 support is achievable via port
mirroring and the use of an external probe.
The SNMP agent software resides in the
switch and uses the information it collects
to provide management for all ports in the
stack providing comprehensive network
monitoring capabilities. In addition, the
agent also provides the ability to set up
policy-based networks by supporting the
Common Open Policy Support (COPS)
protocol.
Configuration management
The process of configuration begins with a
single device but finishes across multiple
devices. Java™ Device Manager is the
device configuration tool for those func-
tions that require communicating with a
single device. It uses a common user inter-
face and workflow that supports many
Nortel Networks Ethernet switches. This
commonality allows the network manager
to become familiar with one tool instead of
multiple tools. Optivity Switch Manager
(OSM) performs the configuration func-
tion such as VLAN assignments, MLT, and
multicast across multiple Nortel Networks
Ethernet switches. Configuration is stored
in NVRAM (Non-Volatile Random Access
Memory).
Fault management and resolution
With Optivity Network Management
System (ONMS), the network manager has
quick access to the information required to
manage and isolate all network events on
BayStack 460 Switches. Tools, such as
‘Physical Topology View,’ inform the
network manager how a particular event is

7
affecting the physical connectivity within
the network. The ‘End Node Locate’ tool
provides the ability to locate a failing end
node and, with one mouse click, have
access to the RMON statistics for the
failing Ethernet port supporting that end
node. These solutions provide visual and
statistical tools necessary to quickly resolve
any network event or to manage perform-
ance in real-time. The BayStack 460
Switches support “syslog” capability that
helps in troubleshooting network issues.
Quality of Service (QoS)
The BayStack 460 Switch’s QoS feature
allows not just the efficient utilization of
bandwidth, optimizing existing network
resources and capabilities, but also the
provision of packet classification and
marking at the edge of the network,
simplifying the QoS deployment at the
aggregation and core of the network. By
classifying, prioritizing, policing, and
marking (DiffServ Code Point) LAN
traffic, networks can offer reliable connec-
tivity and required bandwidth for mission-
critical applications like IP telephony and
mission-critical data applications to specific
groups and users, and to individual devices.
For each of these applications, advanced
QoS features support Internet Engineering
Task Force (IETF) standard DiffServ QoS
architecture—a packet classification based
on the content of IP packet header fields
(voice, video, data), traffic policing, and
remote sniffing.
Queuing function
The BayStack 460 Switch provides network
availability for mission-critical applications,
devices, and users. This is performed by
classifying, prioritizing, and marking LAN
IP traffic using up to eight hardware-based
queues on every port including the stacking
ports based on the following parameters:
•MAC address-based filtering
•IP ToS/DSCP marking
•IP source address/destination address
or subnets
•TCP/UDP source/destination
port/port range
•IEEE 802.1p user priority bits
•Ingress source port
•IP Protocol ID (e.g. TCP, UDP, IGMP)
•EtherType (e.g. IP, IPX)
•IEEE 802.1Q VLAN ID
The BayStack 460 Switch also has the
ability to read packets that have been
marked from other devices such as the
Passport* 8600 Switch. Additionally,
weighted round robin prevents normal
priority traffic from being starved by
expedited traffic (on a per-packet basis).
QoS and Policy management
DiffServ QoS provides the ability to read,
alter, prioritize, tag, or mark IP packets
based upon information embedded in the
Type of Service (ToS) field. The level of
service can be marked in the embedded
information inside the ToS field of each IP
packet. DiffServ is based on the ToS field.
The BayStack 460 Switch has application-
specific integrated circuits (ASICs) to
enable the DiffServ Code Point (DSCP) to
be mapped to the IEEE 802.1p user prior-
ity bits to provide consistent QoS at Layer 3
(IP) and Layer 2 (Ethernet). The QoS poli-
cies can be configured via the BayStack 460
Switch’s built-in Web-based management
tools to facilitate QoS or alternatively,
Optivity Policy Services can be utilized for
dynamic end-to-end enterprise-wide policy
and QoS management, facilitated through
the Common Open Policy Service (COPS)
protocol.
Quality of Service provisioning
With Optivity Policy Services, policies can
be created through a simple and intuitive
drag-and-drop workflow. Optivity Policy
Services is the Policy Decision Point in a
DiffServ QoS implementation.
Further benefits include:
•A simple intuitive policy creation
•The ability to re-use common filter sets
•The provision of a network-wide view
of policies currently in use
•The ability to avoid QoS provisioning
errors
•A centrally managed DSCP and 802.1p
queue mapping tables
•Saved time in provisioning the
network—as thousands of CLI or
Web transactions are reduced to a few
simple actions
Simplified QoS
The BayStack 460 Switch supports Nortel
Networks Service Classes (NNSCs) which
provide simplified QoS provisioning.
NNSCs provide factory-default QoS
configurations, eliminating the complexi-
ties often associated with QoS-enabled
network deployments.
NNSCs provide default settings such as:
•DSCP marking per class
•DiffServ forwarding behavior (PHB)
per class
•DSCP to queue mapping
•DSCP to 802.1p mapping
•Default scheduler per class
By classifying the traffic and placing it into
an NNSC, complex QoS configurations are
eliminated. NNSCs simplify the deploy-
ment of a QoS-enabled network with
Nortel Networks switching solutions. Using
the Web-based interface, select the NNSC
that best suits the type of traffic or applica-
tion being classified on each Nortel
Networks switching product and take
advantage of the default QoS settings. This
saves on provisioning time but most impor-
tantly, ensures that the QoS functions are
provisioned consistently across the network.

8
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.

9
Performance specifications
•Switch fabric: 2.56 Gbps
•Frame forward rate (64-byte packets): Up to 3.2 million packets per second (pps) maximum, learned
unicast traffic
•Port forwarding/filtering performance For 10 Mbps: 14,880 pps maximum
(64-byte packets): For 100 Mbps: 148,810 pps maximum
•Address database size: 16,000 entries at line rate (32,000 entries without flooding)
•Addressing: 48-bit MAC address
•Frame length: 64 to 1,518 bytes (IEEE 802.1Q Untagged)
64 to 1,522 bytes (IEEE 802.1Q Tagged)
Data rate 10 Mbps Manchester encoded or 100 Mbps 4B/5B encoded
Interface options
•10BASE-T/100BASE-TX RJ-45 (8-pin modular) connectors for MDI-X interface
•100BASE-FX SC and MT-RJ connectors for switched 100 Mbps (100BASE-FX)
connections over 50/125 and 62.5/125 micron multimode fiber optic cable
(2 km/6562 ft. maximum distance)
•1000BASE-SX (Shortwave Gigabit Fiber) SC connectors for shortwave 850 nm fiber optic connections
MDA over multimode (550 m/1805 ft.) fiber optic cable
•1000BASE-LX (Longwave Gigabit Fiber) SC connectors for longwave 1300 nm fiber optic connections over single-
MDA mode (3km/9843 ft.) or multimode (550m/1805 ft.) fiber optic cable
The BayStack 450-1GBIC MDA supports the following GBICs:
•1000BASE-SX Uses shortwave 850 nm fiber optic connectors to connect devices over
multimode (550 m or 1,805 ft) fiber optic cable
•1000BASE-LX Uses longwave 1,300 nm fiber optic connectors to connect devices over
single mode (5 km or 3.1 mi) or multimode (550 m or 1,805 ft) fiber
optic cable
•1000BASE-XD Uses single mode fiber to connect devices over distances up to 40 km
(or 31 mi), depending on the quality of the cable
•1000BASE-ZX Uses single mode fiber to connect devices over distances up to 70 km
(or 43 mi), depending on the quality of the cable. The ports on this GBIC
operate only in full-duplex mode
Network protocol and standards compatibility
•IEEE P802.3af compliant
•IEEE 802.3 10BASE-T (ISO/IEC 8802 3,Clause 14)
•IEEE 802.3u 100BASE-TX (ISO/IEC 8802-3,Clause 25)
•IEEE 802.3u 100BASE-FX (ISO/IEC 8802-3,Clause 26)
•IEEE 802.1p (Prioritizing)
•IEEE 802.1Q (VLAN Tagging)
•IEEE 802.1z (Gigabit)
•IEEE 802.1D (Spanning Tree Protocol)
•IEEE 802.1x
•IEEE 802.3x
•IETF DiffServ
RFC support
•RFC 1213 (MIB-II); RFC 1493 (Bridge MIB); RFC 2863 (Interfaces Group MIB)
•RFC 2665 (Ethernet MIB); RFC 2737 (Entity MIBv2); RFC 2819 (RMON MIB)
•RFC 1757 (RMON); RFC 1271 (RMON); RFC 1157 (SNMP); RFC 2748 (COPS)
•RFC 2940 (COPS Clients); RFC 3084 (COPS Provisioning); RFC 2570 (SNMPv3)
•RFC 2571 (SNMP Frameworks); RFC 2572 (SNMP Message Processing)
•RFC 2573 (SNMPv3 Applications); RFC 2574 (SNMPv3 USM);
RFC 2575 (SNMPv3 VACM)
Technical specifications
Table 1: BayStack 460-24T-PWR Power over Ethernet Switch technical specifications

10
Electrical specifications
•Input voltage: 100 to 240 VAC at 47 to 63 Hz
•Input power consumption: 400 W maximum
•Input volt amperes rating: 440 VA maximum
•Input current: 4.5 A @ 100 VAC, 2.25 A @ 240 VAC
•Maximum thermal rating: 575 BTU/hr
Physical specifications
Weight: 5.8 kg (12.76 lb)
Height: 7.04 cm (2.77 in.)
Width: 43.82 cm (17.25 in.)
Depth: 38.35 cm (15.1 in.)
Environmental specifications
•Operating temperature: 0° to 40° C (32° to 104°F)
•Storage temperature: –25° to 70° C (-13° to 158°F)
•Operating humidity: 85% maximum relative humidity, non-condensing
•Storage humidity: 95% maximum relative humidity, non-condensing
•Operating altitude: Up to 3024 m (10,000 ft.)
•Storage altitude: Up to 3024 m (10,000 ft.)
Safety agency approvals
•UL listed (UL 60950)
•CUL (CAN/CSA-22.2 No. 60950)
•CB certificate and report with all national deviations
(IEC 60950/EN60950)
Electromagnetic emissions summary
Meets the following standards:
•United States: FCC CFR47 PART 15, SUBPART B, Class A
•Canada: ICES-003, ISSUE-3, Class A
•Australia/New Zealand: AS/NZ 3548: 1995/A1:1997/A2; 1997, Class A
•Japan: VCCI-V-3/02.04/ Class A
•Taiwan: CNS 13438, Class A
•Europe: EN 55022-1998/A1:2000 Class A
•EMC Directive: 89/336/EEC: Directly published in the EMC Directive of 89/336/EEC with
•Modification 92/31/EED, 93/13/EC
•EN 61000-3-2: 2000
•EN 61000-3-3: 1995/A1:2001
•Global: CISPR 22-1997/A1:2000, Class A
Electromagnetic immunity
Global: CISPR 24:1997/A1:2001
Europe: EN55024:1998/A1:2001
Technical specifications
Table 1: BayStack 460-24T-PWR Power over Ethernet Switch technical specifications—continued

Ordering information
Table 2: BayStack 460-24T-PWR Power over Ethernet Switch ordering information
Order No. Description
AL2001x20** BayStack 460-24T-PWR Power over Ethernet Switch (24 10/100BASE-TX plus 1 MDA slot and 1 cascade module slot).
AL2033011 BPS2000-4TX 4-port 10/100 MDA
AL2033012 BPS2000-4FX 4-port 100BASE-FX MDA w/mini MT-RJ-type connectors
AL2033013 BPS2000-2FX 2-port 100BASE-FX MDA w/SC-type connectors
AL2033010 BayStack 400-ST1 Cascade Module (includes cascade cable)
AL2018001 BayStack 400-SRC Cascade Return Cable (1 meter)
AL2018002 BayStack 400-SSC Spare Cascade Cable (18 inch)
AL2018004 BayStack 400-SRC Cascade Return Cable (3 meter)
AL2033005^ BayStack 450-1SX 1-port 1000BASE-SX Single PHY MDA
AL2033006^ BayStack 450-1SR 1-port 1000BASE-SX Redundant PHY MDA
AL2033007^ BayStack 450-1LX 1-port 1000BASE-LX Single PHY MDA
AL2033008^ BayStack 450-1LR 1-port 1000Base-LX Redundant PHY MDA
AL2033009^ BayStack 450-1GBIC MDA (GBIC not included with MDA)
AA1419001~ 1-port 1000BASE-SX Gigabit Interface Connector (GBIC), SC connector
AA1419002~ 1-port 1000BASE-LX Gigabit Interface Connector (GBIC), SC connector
AA1419003~ 1-port 1000BASE-XD Gigabit Interface Connector (GBIC)-40km SC connector
AA1419004~ 1-port 1000BASE-ZX Gigabit Interface Connector (GBIC)-70km SC connector
AL2033014*** BPS2000-1GT 1-port 1000BASE-TX MDA
AL2033015*** BPS2000-2GT 2-port 1000BASE-TX MDA
AL2033016*** BPS2000-2GE 2-port Small Form Factor GBIC MDA (supports up to two Small Form Factor GBICs)
AA1419013 1-port 1000BASE-SX Small Form Factor GBIC (LC connector)
AA1419014 1-port 1000BASE-SX Small Form Factor GBIC (MT-RJ connector)
AA1419015 1-port 1000BASE-LX Small Form Factor GBIC (LC connector)
AA1419025 1-port 1000BASE-CWDM Small Form Factor GBIC—1470nm Wavelength (40km), LC connector
AA1419026 1-port 1000BASE-CWDM Small Form Factor GBIC—1490nm Wavelength (40km), LC connector
AA1419027 1-port 1000BASE-CWDM Small Form Factor GBIC—1510nm Wavelength (40km), LC connector
AA1419028 1-port 1000BASE-CWDM Small Form Factor GBIC—1530nm Wavelength (40km), LC connector
AA1419029 1-port 1000BASE-CWDM Small Form Factor GBIC—1550nm Wavelength (40km), LC connector
AA1419030 1-port 1000BASE-CWDM Small Form Factor GBIC—1570nm Wavelength (40km), LC connector
AA1419031 1-port 1000BASE-CWDM Small Form Factor GBIC—1590nm Wavelength (40km), LC connector
AA1419032 1-port 1000BASE-CWDM Small Form Factor GBIC—1610nm Wavelength (40km), LC connector
AA1419033 1-port 1000BASE-CWDM Small Form Factor GBIC—1470nm Wavelength (70km), LC connector
AA1419034 1-port 1000BASE-CWDM Small Form Factor GBIC—1490nm Wavelength (70km), LC connector
AA1419035 1-port 1000BASE-CWDM Small Form Factor GBIC—1510nm Wavelength (70km), LC connector
AA1419036 1-port 1000BASE-CWDM Small Form Factor GBIC—1530nm Wavelength (70km), LC connector
AA1419037 1-port 1000BASE-CWDM Small Form Factor GBIC—1550nm Wavelength (70km), LC connector
AA1419038 1-port 1000BASE-CWDM Small Form Factor GBIC—1570nm Wavelength (70km), LC connector
AA1419039 1-port 1000BASE-CWDM Small Form Factor GBIC—1590nm Wavelength (70km), LC connector
AA1419040 1-port 1000BASE-CWDM Small Form Factor GBIC—1610nm Wavelength (70km), LC connector
AL2018008 2-pin cable from BayStack 460-24T-PWR to BayStack 10 PSU (for RPSU and load-sharing capability)
DY4311015 Power splitters for i200X phones—bag of 12
*These features will be supported on future software releases available free from the Web.
** The seventh character (x) of the switch order number must be replaced with the proper code to indicate desired product nationalization:
“A” – No power cord included
“B” – Includes European “Schuko” power cord common in Austria, Belgium, Finland, France, Germany, The Netherlands, Norway, and Sweden
“C” – Includes power cord commonly used in the United Kingdom and Ireland
“D” – Includes power cord commonly used in Japan
“E” – Includes North American power cord
“F” – Includes Australian power cord, also commonly used in New Zealand and the People’s Republic of China
^Supports two output (egress) queues
~One of these GBICs can be installed in the BayStack 450-1GBIC MDA
***Supports up to eight output (egress) queues
11

Nortel Networks is an industry leader and innovator focused on transforming how the world
communicates and exchanges information. The company is supplying its service provider and
enterprise customers with communications technology and infrastructure to enable value-added
IP data, voice and multimedia services spanning Wireline, Wireless Networks, Enterprise Networks,
and Optical Networks. As a global company, Nortel Networks does business in more than 150 countries.
More information about Nortel Networks can be found on the Web at:
www.nortelnetworks.com/baystack460
GSA Schedule GS-35F-0140L
1-888-GSA-NTEL
For more information, contact your Nortel Networks representative, or
call 1-800-4 NORTEL or 1-800-466-7835 from anywhere in North America.
*Nortel Networks, the Nortel Networks logo, the globemark design, and BayStack, Passport, Succession, Optivity, and
BaySecure are trademarks of Nortel Networks. All other trademarks are the property of their owners
Copyright © 2003 Nortel Networks. All rights reserved. Information in this document is subject to change without notice.
Nortel Networks assumes no responsibility for any errors that may appear in this document.
NN102540-072303
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