High-Performance and HighAvailability Stacking
The SecureStack A2 stackable switch family
delivers cost-effective Layer 2 switching
in a single stack with up to 384 10/100
ports with 16 gigabit uplinks. Reliability
and availability is assured with support for
Closed Loop Stacking, redundant core
connections, redundant power options and
redundant stack management.
Each SecureStack A2 switch has two
mini-GBIC (SFP) ports and two fixed
10/100/1000 ports that can be used as
standard Ethernet uplinks but can also be
used as stacking ports that support up to
2 Gbps of bi-directional bandwidth
between any two adjacent switches. No
additional stack module is required to
stack the switches. A single stack can
be comprised of any combination of
SecureStack A2 switches allowing a mixture
of 24- and 48-port 10/100, 100Base-FX and
Power-over-Ethernet ports to be linked to
the network core via copper, multimode
fiber and/or single-mode fiber Gigabit.
Closed Loop Stacking is implemented,
which assures that a single switch or
cable connection failure in the stack will
not impact the overall stack operation.
The SecureStack A2 stack auto-configures, allowing stack switch units to be
added or removed with minimal p a c k e t
interruption. Up to eight SecureStack
A2 switches can be supported in a stack
with a single IP address for complete
stack management. Redundant s t a c k
management is supported by a s s i g n i n g
a primary and multiple secondary stack
managers.
Switching Services
All SecureStack A2 switches support
standards-based switching. The IEEE
standards for switching (IEEE 802.1D
MAC Bridges) and IEEE 802.1t (802.1D
Maintenance), as well as Multiple
Spanning Trees (IEEE 802.1s) and Rapid
Reconvergence (IEEE 802.1w), are fully
supported. All switches support up to
8,000 addresses and have four hardware
queues per port. Ethernet Flow Control
(IEEE 802.3x) as well as standards-based
Link Aggregation (IEEE 802.3ad) are
fully supported in every switch model. In
addition, all switches support IGMP
Snooping v1 and v2.
Traffic Classification and QoS
A major component for supporting converged networks is traffic classification.
All SecureStack A2 switches deliver
Layer 2/3/4 packet classification and
marking at the edge based on any of the
following:
• MAC address
• Physical port
• IP address
• IP protocol
• IP ToS/DSCP marking
• TCP/UDP port
• IP subnet
