Nortel Networks 460-24T-PWR User Manual

PCs and servers. All 24 ports of the
BayStack 460 Switch can be powered.

High-density Power over
Ethernet switch

The BayStack 460-24T-PWR Switch has
24 10/100 Mbps 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).
The 2.5 Gbps cascading bandwidth offers
dedicated bandwidth between switches
without sacrificing any uplink ports.
The uplink ports can be used for connec­tions to backbone switches such as the
Passport 8600 Switch.

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
draft-compliant devices such as IP phones,
wireless access points, net 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-resiliency, with the addition of Power
over Ethernet capability. It enables enter­prise customers to power devices while
maintaining connectivity to standard
10/100 Mbps Ethernet devices such as

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, net cameras, security and lighting
devices, and access control devices

• Provides power to all 24 ports

• IEEE P802.3af draft-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

• Network availability with QoS features

• Fail-safe stacking design assures

continuous uptime

• Resilient connectivity for minimal
network downtime

• Secure access and data traffic protection

• Simplifies the process of making adds,

moves, and changes

Product Brief

Figure 3: Distributed MultiLink Trunking

across stack for higher bandwidth
and fault tolerance

IEEE P802.3af draft-compliant

The BayStack 460-24T-PWR Switch is
IEEE P802.3af draft-compliant. It can
provide Power over Ethernet to any IEEE
P802.3af draft-compliant devices such as IP
phones, wireless access points, net 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 themselves 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 suffi-
cient to power most devices. The standard
is expected to be ratified in Q3, 2003.

Auto discovery feature

The BayStack 460-24T-PWR Switch auto­matically 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 priority 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 simplified
Web-based configurations on data and
power properties. The graphical user
interfaces 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
IP 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 results in significant
cost and space savings.

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, assur­ing continuous uptime even if a switch in
the stack should fail. A loop-back—or
redundant cascade cable—is used to seam­lessly connect the entire stack to eliminate
any single point of failure (Figure 2).

MultiLink Trunking

MultiLink Trunking (MLT) enables group­ing of links between the switch and another
switch or a server to provide greater band­width with active redundant links.

With Nortel Networks unique Distributed
MultiLink Trunking (DMLT) feature,
trunked ports can span multiple units of
the stack for fail-safe connectivity to mission­critical servers and the network center
(Figure 3). This can provide bandwidth of up
to 800 Mbps (when used with 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 MultiLink Trunking (SMLT) eliminates
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 connections to a

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

Multi-Gigabit
load-balancing
and failover
protection for
uninterrupted
access to the
network center

BayStack 460-24T-PWR Switch Stack

Passport 8600 Switch Server

Passport 8600 network core allows customers
to double network bandwidth 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
offers the next generation of flexible
networking solutions (Figure 4).

Stackable with the BayStack
450 Switch, BayStack Business
Policy Switch and BayStack
470 Switch*

The BayStack 460 Switch can be stacked
with the BayStack 450 Switches, BayStack
Business Policy Switches, and BayStack 470
Switches.†A maximum of eight switches
can be stacked together in any combination.

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 small­to 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 estab­lished for each switch, to extend the broadcast
domain and segment network traffic. The
256 VLANs can be spread among port­based, and MAC source address-based
VLANs (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 lets
individual VLANs have separate forwarding
databases within the switch. IVL allows the
switch to handle duplicate MAC addresses
if they are in different VLANs.

IGMP snooping

The BayStack 460 Switch features IP
MultiCast support by examining
(‘snooping’) all IGMP traffic in hardware
at line rate, and pruning unwanted data
streams from affecting network or end-station
performance.

Common software platform

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),
menus, Optivity Network Management
System (NMS), Optivity Switch Manager
(OSM), and Optivity Policy Services (OPS).

End-to-end Voice over IP

The BayStack 460 Switch provides enterprises
another option for end-to-end deployment
of Voice over IP. Succession Communication
Server for Enterprise 1000, Business
Communications Manager, Meridian, and
BayStack all provide the choices that allow
enterprises—from small and medium busi­nesses to large campus infrastructures—

3

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 MultiLink Trunking (SMLT)

† Future software release.

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 of several BayStack 460
Switches. Multiple STGs provide multiple
data paths, which can be used for load­balancing and redundancy.

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 down­loaded, the configuration file automatically
configures the switch or stack according to
the CLI 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.

Security

The BayStack* 460 Switch features
BaySecure, which allows authentication
of all access, not only to the switches for
management and configurations, but also
access to the infrastructure through these
switches. This software feature limits access
to only network authorized and trusted
users including full tracking of network
connections. With BaySecure, network
access is granted or denied by proper MAC
address identification (maximum of 448).
In addition, with the Distributed Access
List Security feature, network access is
granted or denied on a per port basis.
The BayStack 460 Switch also provides
Remote Authentication Dial-In User
Service (RADIUS) for switch security
management.

IP Manager List limits access to the manage­ment features of the BayStack 460 Switch
by a defined list of IP addresses, providing
greater network security and manageability.

SNMPv3 provides user authentication and
data encryption for higher security. It also
offers secure configuration and monitoring.

For even greater security, the BayStack 460
Switch also supports the IEEE 802.1x
standard (Extensible Authentication Protocol
or EAP). EAP limits access to the network
based on user credentials. A user needs to
“log in” to the network using 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. For
example, banks, trading rooms, or classroom
training facilities could take advantage of this
feature. EAP supports client access to the
network and interoperates with Microsoft
Windows XP.

Web-based management

Web-based management using a Web browser
simplifies the task of managing the BayStack
460 Switch. This feature provides summary,
configuration, fault, statistics, application,
administration, and support pages for entire
stack. Traffic classification and prioritization
can be set via the Web-based QoS Wizard
and advanced configuration tool. Real-time
sampling provides up-to-date LED stats info
for stacked units. The Web interface also
allows for static configuration of numerous
parameters of the device.

4

Figure 5: Small to medium

enterprise solution

Business Communications

Manager 400

BayStack 460 Stack

Business Series

Terminals

Servers

Desktop

users

802.11

Wireless

LAN

i2004

Standard LAN

Power over Ethernet

Power

10/100

Mbps

Net

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