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D-Link xStack Switch Series: Meeting the Need at the Edge of the Network 15

D-Link Systems, Inc.

October 2004

D-Link xStack Technology Bi-directional Fail-Safe Stacking

Bi-directional fail-safe stack architecture. Stack Up to 12 units in a Ring topology

Stack up to 7 units in a Star topology.

Subsecond Failover in Ring-Stacking

Within microseconds of a breakage of one part of the path, all data is switched to the active half

of the bi-directional path. The switches continually monitor the stack ports for activity and

correct data transmission. If error conditions cross a certain threshold, or there is insufficient

electromagnetic contact of the cable with its port, the switch detecting this then sends a message

to its nearest neighbor opposite from the breakage. Both switches then divert all their traffic onto

the remaining good path.

Single Management IP Address

The stack receives a single IP address as a part of the initial configuration. After the stack IP

address is created, the physical switches linked to it become part of the master switch group.

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