D-Link DWL_7100 User Manual download pdf (Page 13)

4.2 Chain Configuration:

Where the Star configuration can cover a more rectangular or square area, a Chain

configuration allows coverage of a longer shape (for instance a long corridor). The AP’s are chained

together, where the first AP for example could have a connection to the existing infrastructure (with

all the network resources).

In this setup the AP’s at either end of the chain will need one WDS port enabled while the AP’s

in the middle of the chain will require two WDS ports to be configured to point upward and

downward in the chain. In a local setup a chain of 3 AP’s has been created (which does not mean

that 3 is the upper limit, but it indicates what possibilities exist).

Potential issues that may arise:

? The area covered by the several APs is larger than the coverage area of a single AP. This

can negatively impact the defer mechanism of the radios. (i.e. the APs maybe to far away

from each other so that they cannot “hear” each others transmissions, which can result in

excessive collisions and retransmissions)

? If a single PC card is used for all wireless traffic and wireless clients are operational as

well, end-to-end throughput may be considered too low (depending on the applications).

? In the chain configuration, if the chain becomes very long end-to-end latency issue

might come into play.

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D-Link DWL_7100 User Manual Page 13