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Low Bandwith, WLC 5508 and LAP 1142N, please help !

Hello Everyone

For the Environment:

- I have a WLC 5508 With a license up to 100 AP, at the Point there are 39 AP connected.

- The WLC is connected with 8x 1Gbit/s, as a Trunk ==> 2 Members of 3750 Switches Stack ( 4gig and 4 gig)

- The AP are connected to diferent 2960s with an Uplink ( 3 Gbit/s)  to the 3750 Switches

- There are max. 12 AP on each 2960s

- The AP are powered over Ethernet

The AP:

- it runs a/b/g/n and on 2,4 Ghz i schould have 300 mbit/s as for the 5 Ghz it schould also run 300mbit /s

- the Ap has an uplink of 1 Gbit/s

The clients:

- have a intel Wifi link 5300 AGN Card

To the Problem:

- if i connect to one AP, and the Signal strength is High, i get an upload rate of max. 6-8Mbyte/s.

  and i am the only Person uploading.

  if i upload from 3 clients the same data from the same spot to the same target i get 2-3 Mbyte/s per client.

  if connect to the same target and run over ethernet cable fom the same spot, i get an upload of 70 -85 Mbyte/s.

Question:

- Why am i having these Bandwith problems ??

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