Enterasys SecureStack B2G124-24 B2G124-24 User Manual

The SecureStack B2 offers a variety of standards-based features to 
ensure network availability. 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 standards allow 
for redundant network connections, automatic failover and recovery 
capabilities. The SecureStack B2 switches support additional reliability 
features such as Distributed Link Aggregation Groups (six groups of eight 
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 available as an option for both the Power-
over-Ethernet and standard Ethernet SecureStack B2 switches. The 
redundant power options 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. 

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 
more than 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-over-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.

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 bandwidth 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.

This switch features 24 ports of 10/100/1000 connectivity, four uplink 
ports supporting SFP (Small Form-factor Pluggable) Mini-GBICs and 
two integrated stacking ports. Ports 21 through 24 on this model have 
the flexibility to be mapped as either 10/100/1000 ports or as optical 
Gigabit Ethernet ports with the installation of a fiber transceiver in the 
appropriate SFP socket.

This switch features 48 ports of 10/100/1000 connectivity, four uplink 
ports supporting SFP (Small Form-factor Pluggable) Mini-GBICs and 
two integrated stacking ports. Ports 45 thru 48 have the flexibility to be 
mapped as either 10/100/1000 ports or as optical gigabit Ethernet ports 
with the installation of a fiber transceiver in the appropriate SFP socket.

This switch features 48 ports of 10/100/1000 with Power-over-
Ethernet capability, four uplink ports supporting SFP (Small Form-factor 
Pluggable) Mini-GBICs, and two integrated stacking ports. Ports 45 
through 48 have the flexibility to be mapped as either 10/100/1000 
ports or as optical Gigabit Ethernet ports with the installation of a fiber 
transceiver in the appropriate SFP socket.

This switch features 48 ports of 10/100 Base-TX connectivity, four 
uplink ports supporting SFP (Small Form-factor Pluggable) Mini-GBICs, 
and two integrated stacking ports. The SFP ports support various optical 
gigabit Ethernet solutions with the installation of a fiber or copper 
transceiver to increase the total number of ports to 52.

This switch features 48 ports of 10/100Base-TX with Power-over-
Ethernet capability, four uplink ports supporting SFP (Small Form-factor 
Pluggable) Mini-GBICs, and two integrated stacking ports. The SFP ports 
support various optical gigabit Ethernet solutions with the installation of 
a fiber or copper transceiver to increase the total number of ports to 52.