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A superior solution: Virtual Chassis Stacking

(VCS) and Link Aggregation (LAG)

VCS

Device

resiliency

(Virtual Chassis Stacking)

Allied Telesis now provides a superior solution for enterprise

network resiliency.

In essence, the solution is very simple: the core of the network

is a set of switches connected together to form a single virtual

chassis. In normal operation, the virtual chassis acts as a single

switch.The edge switches have dual connections to the virtual

chassis using port aggregation (as seen in figure 2).

10 Gigabit link

1 Gigabit link

10/100 link

Link aggregation

Allied Telesis Solutions: VCStack

LAG

Path

resiliency

(Link Aggregation)

8600

8000S

Resiliency in this network is delivered by the virtual chassis and

the multiple links:

■

Edge switches have dual connections to the virtual chassis.This

provides resiliency in the case of broken links or failed ports.

■

Each link from an edge switch connects to different virtual chassis

members.This provides resiliency in the case of core switch

failure.

"The virtual chassis acts as a single switch..."

SwitchBlade x908

x900

EDGE

Servers

CORE

Figure 2:Virtual Chassis Stacking