We are now in the process of upgrading from 802.11b to 802.11g in our Cisco 1200's. Here's what I see so far:
In 802.11g, if there are 5 "g" clients buzzing along at 54MB/s and one "b" client walks in the room and connects at 11MB/s, all other clients drop to 11MB/s *during actual network activity from the "b" client*. It appears that when the "b" client is idle or disassociates, the "g" clients enjoy the higher bandwidth again.
Not sure if this typical of what I can expect to see throughout the campus as I install more "g" radios, but this is what we see in our test environment.
I realize that I can deny connections to the AP at speeds of 11MB/s or less to get "pure g", but we need the mixture.
Philippe Hanset wrote:
Eric,
You can limit yourself which connection you allow, "transmit rate". But bare in mind that a person joining an AP at 1 Mbps will slow down all the other ones! So it's not a common denominator effect but a queuing effect. When you mix 802.11g and b it gets even worse.
Philippe Hanset U of Tennessee
On Fri, 26 Mar 2004, Eric T. Barnett wrote:
Hello,
I'm new to the listserv. I read somewhere that the AP's maximum speed for all clients is equal to the lowest connected speed, i.e. if one person connects at 1Mb then all users on that AP connect at 1Mb. Is this true? If so, that would explain why some of my clients end up with low speeds and great signal strength. If this is vendor specific, we are using Cisco 350 and 1200's on campus.
Thanks,
Eric Barnett, CCNA
Wireless Administrator
Information and Technology Services
Arkansas State University
870-972-3033
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