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WITCH

LADE

Performance

Wire speed switching

The SwitchBlade x908 has fully non-blocking

switching on all ports, so IPv4 Layer 2 switching

and Layer 3 routing occur at wire speed. This is

ideal for high-end server deployments, and when

aggregating gigabit connections.

Aggregation at Layer 2 and Layer 3

Ideal for access aggregation applications at Layer 2.

A large L3 route table provides support for

thousands of IP interfaces, essential when

aggregating complex IP networks.

Industry-leading Quality of Service

Operating at wire-speed, QoS boosts network

performance and guarantees the delivery of

business-critical Ethernet services and applications.

Enterprise and Education customers can be sure

that time-critical services like voice and video

applications will take precedence over non-

essential services like file downloads. Unmatched

QoS accuracy is achieved with a bandwidth limit

resolution down to 1Kbps, which is ideal for

precise control of Enterprise desktop-based

VoIP applications.

Service Providers (SPs) can offer customers

bandwidth and performance profiles tailored to

their needs.

Reliability

The SwitchBlade x908 switch operates with one

Power Supply Unit (PSU); installing a second PSU

provides redundancy. Internal PSUs eliminate the

need for an external Redundant Power Supply

(RPS) that occupies valuable rack space. Built-in

redundancy guarantees the continued delivery of

essential services.The SwitchBlade

features front-to-back cooling, which increases its

reliability.

Multicasting

The SwitchBlade x908 has a high multicast group

capacity.This allows SPs to offer as many video

services to their customers as possible, maximizing

their per-port revenue. Extensive multicast

protocol support includes PIM-SM and IGMPv3.

Security

The SwitchBlade x908 has 802.1x user

authentication.This is essential for Enterprise

networks needing to prevent intruders from

accessing their network. Other security features

include Private VLANs.

Allied Telesis

| Advanced Layer 3 Modular Switch

908

Easy management options

Administrators can choose from a range of secure

remote management options including SNMPv3

and SSH.

Flexibility

The high speed expansion modules provide

copper or fiber connectivity possibilities, delivering

the ultimate in flexibility.

Expansion module options:

• AT-XEM-STK Stacking XEM

• AT-XEM-1XP 1 x 10GbE (XFP)

• AT-XEM-12S 12 x 100/1000BASE-X SFP

ports

• AT-XEM-12T 12 x 10/100/1000BASE-T

(RJ-45) ports

The XEMs are also compatible with the x900-24X

and x900-12XT/S.

All of these modules provide non-blocking

performance, while the ten gigabit uplinks make the

SwitchBlade x908 ideal for aggregating gigabit to the

desktop or for gigabit uplinks from Fast Ethernet

switches.

Ethernet Protected Switched Rings

Ethernet Protected Switched Rings (EPSR) and

10 GbE modules allow the SwitchBlade x908, with a

number of x900 switches or iMAPs, to form a

protected ring with sub 50ms failover. This feature is

perfect for high performance at the core of

Enterprise or Provider Access networks.

Stacking

Virtual Chassis Stacking provides a highly available

system where network resources can be spread

x908 also

out across a number of stacked nodes, thus

reducing the impact of any one of the stacked

nodes failing. Switch ports on different nodes

across the stack can be aggregated together to

provide excellent high availability characteristics.

Excellent scalability can be achieved in that

individual stacked nodes can be inserted into, and

removed from, the stack as bandwidth and feature

requirements in the network evolve.

On the SwitchBlade x908, stacking can be

achieved by using the two connectors on the rear

of the chassis, where each connector is capable of

providing 80Gbps of stacking bandwidth. When

stacking more than two units, this can be achieved

via a XEM module on the front panel. The

stacking XEM module provides two proprietary

30Gbps stacking links allowing up to 4 nodes to

be aggregated.

PoE XEM, expected availability late 2008. Standard

copper XEM available now.

XEM-2XP (2 x XFP) XEM module, expected availability,

late 2008.

It is not possible to use the rear stacking ports and the

XEM-STK in the same stack.

AlliedWare Plus software release 5.2.1 supports stacking

of 2 units. Support for more than 2 units will be available

in a future release.