Enterasys Securestack B2H124-48 B2H124-48 User Manual
Product codes
B2H124-48
Page 3 of 12 • Data Sheet
is supported on individual switches as well
as stack-wide, enabling network managers to
easily monitor and troubleshoot any port in
the stack.
as stack-wide, enabling network managers to
easily monitor and troubleshoot any port in
the stack.
Reliability and Availability
The SecureStack B2 offers a variety of
standards-based features to ensure network
a v a i l a b i l i t y. These features include 802.1D
Spanning Tree, 802.1w Rapid Spanning
Tree, 802.1s Multiple Spanning Trees, and
802.3ad Link Aggregation. All of these stan-
dards allow for redundant network con-
nections, automatic failover and recovery
capabilities. The SecureStack B2 switches
support additional reliability features such
as Distributed Link Aggregation Groups
(6 groups of 8 ports)—a capability that
supports link aggregation across multiple
stack units thereby ensuring that a failure
in a single unit does not disconnect the
stack from the uplink to the core switch.
standards-based features to ensure network
a v a i l a b i l i t y. These features include 802.1D
Spanning Tree, 802.1w Rapid Spanning
Tree, 802.1s Multiple Spanning Trees, and
802.3ad Link Aggregation. All of these stan-
dards allow for redundant network con-
nections, automatic failover and recovery
capabilities. The SecureStack B2 switches
support additional reliability features such
as Distributed Link Aggregation Groups
(6 groups of 8 ports)—a capability that
supports link aggregation across multiple
stack units thereby ensuring that a failure
in a single unit does not disconnect the
stack from the uplink to the core switch.
Redundant stack management is supported
where there is a primary and one backup for
managing the stack entity. All SecureStack
B2 switches support Closed Loop Stacking,
which enables the stack to continue working
even if an individual switch member or cable
connection fails. Power redundancy is
a v a i l a b l e as an option for both the Power-o v e r-
Ethernet and standard Ethernet SecureStack
B2 switches. The redundant power options
are the same as those used by the SecureStack
C2 and allow a switch to operate from its
own internal AC power supply or, if there
is a failure, seamlessly failover to the external
redundant power system.
where there is a primary and one backup for
managing the stack entity. All SecureStack
B2 switches support Closed Loop Stacking,
which enables the stack to continue working
even if an individual switch member or cable
connection fails. Power redundancy is
a v a i l a b l e as an option for both the Power-o v e r-
Ethernet and standard Ethernet SecureStack
B2 switches. The redundant power options
are the same as those used by the SecureStack
C2 and allow a switch to operate from its
own internal AC power supply or, if there
is a failure, seamlessly failover to the external
redundant power system.
Power-over-Ethernet
(PoE IEEE 802.3af) Support
(PoE IEEE 802.3af) Support
Two switch models in the SecureStack B2
switch family provide a centralized IEEE
802.3af-compliant power source for VoIP
phones, wireless access points (e.g.,
RoamAbout AP4102), and remote security
scanners and cameras, eliminating the need
for individual power sources for these
devices. Both switches provide 48 volts of
power over the normally used pairs of each
Category 5 Ethernet cable with a total of
360 watts of power per switch. If all ports
require Power over Ethernet, then the
maximum amount of power required by a
switch family provide a centralized IEEE
802.3af-compliant power source for VoIP
phones, wireless access points (e.g.,
RoamAbout AP4102), and remote security
scanners and cameras, eliminating the need
for individual power sources for these
devices. Both switches provide 48 volts of
power over the normally used pairs of each
Category 5 Ethernet cable with a total of
360 watts of power per switch. If all ports
require Power over Ethernet, then the
maximum amount of power required by a
Class 2 device (7.5 watts) can be delivered
to all ports. Any individual port can provide
up to the maximum 15.4 watts specified in
the IEEE standard. The network manager
has the ability to prioritize which ports receive
power if the power demand exceeds the
switch total of 360 watts. Special power-
shedding support is included in both
switches to enforce the network manager-
specified priorities if the power demand
exceeds the maximum wattage. Additionally,
the SecureStack B2 PoE switches support
a device-detection feature that enables them
to work with powered as well as non-powered
end devices. This feature prevents any
damage from occurring when a port on either
SecureStack B2 PoE switch is connected to
any compliant RJ45 device that is already
powered by its own power source. This
feature also allows any mixture of Power-
o v e r-Ethernet devices and standard Ethernet
devices to be connected to a single switch.
These SecureStack B2 PoE switches
significantly simplify the installation and
capital costs of access points, VoIP phones
and security devices by allowing them to be
installed in out-of-the-way locations that
are without AC power, thereby enabling
maximum coverage.
to all ports. Any individual port can provide
up to the maximum 15.4 watts specified in
the IEEE standard. The network manager
has the ability to prioritize which ports receive
power if the power demand exceeds the
switch total of 360 watts. Special power-
shedding support is included in both
switches to enforce the network manager-
specified priorities if the power demand
exceeds the maximum wattage. Additionally,
the SecureStack B2 PoE switches support
a device-detection feature that enables them
to work with powered as well as non-powered
end devices. This feature prevents any
damage from occurring when a port on either
SecureStack B2 PoE switch is connected to
any compliant RJ45 device that is already
powered by its own power source. This
feature also allows any mixture of Power-
o v e r-Ethernet devices and standard Ethernet
devices to be connected to a single switch.
These SecureStack B2 PoE switches
significantly simplify the installation and
capital costs of access points, VoIP phones
and security devices by allowing them to be
installed in out-of-the-way locations that
are without AC power, thereby enabling
maximum coverage.
Outstanding Configuration
Flexibility
Flexibility
With the SecureStack B2 switch family, mixing
and matching 10/100 and 10/100/1000
switches in a single stack is easy. A small
stack can be started with dual 10/100
switches with redundant Gigabit Ethernet
uplinks to the core. If Power over Ethernet
is needed for remote access points or a
trial test of VoIP phones, a 10/100 PoE
switch can simply be added to the stack.
As higher desktop speeds are required,
10/100/1000 switches can be added. As the
stack grows, the demands on the uplinks
to the core will increase. Distributed Link
Aggregation can be used to increase band-
width from a single gigabit up to eight
gigabit. All of these various types of switches
can be managed as a single entity with a
single IP address and all of the switches in
the stack run a common software image so
there are no incompatibility issues between
the switches.
and matching 10/100 and 10/100/1000
switches in a single stack is easy. A small
stack can be started with dual 10/100
switches with redundant Gigabit Ethernet
uplinks to the core. If Power over Ethernet
is needed for remote access points or a
trial test of VoIP phones, a 10/100 PoE
switch can simply be added to the stack.
As higher desktop speeds are required,
10/100/1000 switches can be added. As the
stack grows, the demands on the uplinks
to the core will increase. Distributed Link
Aggregation can be used to increase band-
width from a single gigabit up to eight
gigabit. All of these various types of switches
can be managed as a single entity with a
single IP address and all of the switches in
the stack run a common software image so
there are no incompatibility issues between
the switches.
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