Enterasys 802.1Q Manual de usuario descargar pdf (Pagina 2)

Reliability and Availability

The A2 design incorporates redundancy and failure protection mechanisms complete with

automatic failover and recovery capabilities to provide a reliable network. An integral power

supply is the primary source of power for the A2 and complete power redundancy is provided

by an optional external power supply. In addition to the standard version of the A2, there is also

a redundant Power over Ethernet (PoE) version of the A2 which supports network devices that

require external power such as wireless access points, VoIP phones and network cameras. A

virtual switch can be created by interconnecting as many as 8 A2s in a single stack, which can be

managed via a single IP address with redundant management connections. The A2’s closed-loop

stacking (CLS) capability utilizes bidirectional switch interconnects to maintain connectivity within

the virtual switch despite any physical switch-level failure. Up to 4 Ethernet ports can be grouped

together to create a multi-link aggregation group (LAG). A LAG’s Ethernet ports can be collocated

on a single A2 or they can be distributed across multiple A2s within a stack to prevent a switch-

level failure from disrupting data communications.

Advanced Quality of Service

Robust quality of service (QoS) features enable strong support for integrated multimedia networks,

including Voice over IP, video, as well as all types of data-intensive applications. The A2 provides 8

hardware-based priority queues for each Ethernet port in order to support a suite of differentiated

services with as many as 8 distinct priority levels. The strict and weighted round robin queuing

algorithms ensure that mission-critical applications receive prioritized access to network resources.

Security

The A2 provides a secure network by utilizing its authentication and security features, which can

be applied at the port level or at the user level. The A2 supports a single user/device per port,

which can be authenticated via IEEE 802.1X or MAC address.

Investment Protection

The A2 is a cost-effective, feature-rich, stackable switch that provides a broad set of features today

and will continue to deliver beneﬁts well into the future. Customers can grow and/or enhance

their networks while protecting their investment by adding A2s into existing A2 networks and/or

stacks. When multiple A2s are stacked together, each switch in the stack assumes the feature set

that is common to all switches in the stack to ensure operational compatibility. All SecureStack

products include a Limited Lifetime Warranty that continues for 5 years after the date of product

discontinuation. For more information regarding warranty terms and conditions please go to

http://www.enterasys.com/support/warranty.aspx.

Performance & Scalability

The A2 provides scalable, wire-rate performance in support of the bandwidth-intensive and

delay-sensitive requirements of today’s demanding applications. Along with a switch capacity of

17.6Gbps, the A2 provides up to 48 10/100Base-T or 24 100Base-FX Ethernet ports as well as

2 10/100/1000 Ethernet ports, which can be used as uplink or stacking connections. As many as

8 A2s can be interconnected in a single stack to create a virtual switch that provides 140.8Gbps

of capacity and up to 384 10/100Base-T or 192 100Base-FX Ethernet ports as well as 32

10/100/1000 Ethernet ports for uplink or stacking connections.

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Enterasys 802.1Q Manual de usuario Pagina 2