Sep 13

How many clients can a Cisco 3702 AP service before service degrades?

I understand that the proper answer to this question is “It depends”. But, my goal is to find the number of simultaneous wireless telephone calls that can be made while attached to the same Cisco 3702 series access point (AP) and same radio A or B/G? I’m not looking for a book answer, I have already found the Cisco Unified Wireless IP Phone 7925G Deployment Guide. On Page 42 is states 13 calls at 6 Mbps, 20 calls at 12 Mbps, and 27 calls at 24-54 Mbps.

So what is the reality of the 3702 series AP? That’s my question. Using a Cisco 7921/7925 IP phone, How many calls have you had going on your network before people started complaining?

On a Cisco 1252 AP, I found that once I hit 14-20 clients running terminal emulation software, the performance was very poor. The clients were using Telnet and it took a long time for the users to login and get their first assignment.

What about running a telephone application like the Shortel client. This client is loaded on a smartphone and makes calls over the WiFi. Have any of you used this client on a Cisco Wireless network? If so, what APs and controllers did you use? How was your experience?

Placing my configuration aside, can you give me good feedback about your experience with these products?

Apr 15

It’s time to review the SSIDs you have in use!!

How many SSID/WLANs (Wireless LAN) do you have running on your wireless network? If you are like most, you have more then you should. Cisco wireless networks can support up to 16 SSIDs on a single access point (AP). With 16 SSIDs running on a single AP, the channel is about 60% utilized without any clients. This only leaves 40% of the channel to service clients.

Even with N data rates, I feel like my wireless network should be faster. I have coworkers that demand wired connections for meetings and temporary staff due to the slow wireless performance. Depending on the location I may have 8-10 active SSIDs. I did not setup the wireless network, so I don’t know why we have all of the SSIDs that we have. I do know that we have some for the older equipment and others for specific purposes like restricting user access.

After looking into the number of clients on each SSID, I found multiple SSIDs that were not being used. A couple SSIDs only had a couple clients. In one location I found two Cisco 7921 IP Phones on a test SSID instead of the SSID they should be on. They were the only devices using that SSID, what a waste of bandwidth.

After doing my research at each site, I discovered that I could delete about 3 SSIDs at each location.

I’m looking forward to the performance increase by deleting these SSIDs.

Maybe it’s time for you to audit your wireless network. Do you still need all of those SSIDs? You never know, you may be the Wireless Hero by improving the performance without spending any money!!

If you reduce the number of SSIDs please post the results that you find! I’m interested in reading about your results!!

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