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Wireless Additions

By eporteni ·
I currently have a wireless network set up in a large building (4 floors). THroughout the building I have in place 31 Cisco 2100 Series access points running 802.11b. These are all connected to Cisco Catalyst 3550 Inline power switches (7 IDFs) which travel back to the MDF via fiber optic. I am going to be adding on 150 users throughout the building, and people are concerned that the bandwidth/ access to the network is going to be slow or non-existant with this many users. Additionally, in two years,I am going to ba adding on another 150 users, all wireless. This will total about 350 wireless pcs in the building. I had a site survey done by Cisco and they placed the access points in the building based on their findings and on the maximum coverage. With an additional amount of users on at any given time, can I say with any certainty that there will or will not be issues with the wireless connectivity? Will adding additional Aps solve any problems with additional users?
THank you for the info.

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by eporteni In reply to Wireless Additions

Point value changed by question poster.

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by dplewis In reply to Wireless Additions

As with all thing to do with network sizing - it's all entirely dependent on usage - how many users, what applications, etc. Do you have any statistics from your current system? My inclination is that you might well have problems - given the number of users you're talking about.

The other problem you'll have will be the limitation of only three non-overlapping channels on 802.11b.

If I were you, I would consider using 802.11a in addition to 802.11b - particularly for any "high-intensity" systems - like CAD, for instance. 802.11a operates in the 5 GHz frequency, so will co-exist with your 802.11b. It also offers 54 Mb/S (although over shorter range) and has 8 non-overlapping channels.

Am I right in thinking that 2100 is a typo and should say 1200 APs? - in which case you can get add-in 802.11a radios for the existing 802.11b APs... If you're in the UK, drop me a line and I can help further.

Best Regards,
CCDA, CSE, WLAN Design/Sales Specialist

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by eporteni In reply to Wireless Additions

Paul, thanks for your answer to this... it helps a lot. I'm actually in the States - Erie, PA to be exact. The Cisco radios I have are the 1200series... but instead of going to 802.11a, I've been thinking about upgrading them to 802.11g to offer the faster speeds and such. In your opinion, is this still a viable option? I know that if I went to a on these, I woul also have to buy antennas along with the radio cards, and that could get quite expensive. if by going to 802.11g and adding more Access points where needed, would it then also help with the throughput issues and the additional users issue?
Thanks for your help!

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