Question about 3Com Wireless LAN Access Point 7250 802.11g/b (3crwe725075a-uk)

1 Answer

Frequent wireless disconnections 802.1X WPA TKIP

We have implemented 3com wireless access points in our network using 802.1X WPA TKIP settings. Windows IAS server is providing the authentication service for the wireless stations; the IAS server is integrated with windows active directory. Furthermore, the wireless stations get the IP from a centralized DHCP server. So far all is working fine. The problem is that Sometimes the wireless stations get authenticated and got the IP from the DHCP server but again disconnected and then start the process again and again. Sometimes the user is successfully authenticated and got the IP but when it disconnect from the wireless it fails to connect again We have setup the access points at different locations in a city. A user successfully authenticated in one location failed to get connected when roam to a different location. Note that all the IAS DHCP and Windows active directory are centralized. Furthermore we the wireless users have verity of laptops like DELL, IBM, Toshiba, HP. Kindly advise.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 21 Answers
Re: frequent wireless disconnections 802.1X WPA TKIP

Try using predefined IP addresses. Let each pc make it's own IP address and see if the conflicts continue, if they do, post again. :)

Posted on Feb 11, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

4 Answers

What's the difference between WEP and WPA? What should I pick?

WEP is a weak securtiy protocol that is outdated and can be easily broken

WPA is a newer security protocol that is much harder to break with AES encryption

WPA is always recommended mode for operation over WEP.

Use WPA2 which is latest version if it is supported by device.

Mar 12, 2011 | Belkin N1 Wireless-N Wireless Router


Authentication errors

with the internet of everything just around the corner, more and more devices mean more and more standards. when one is faced with an authentication error, and if they've triple checked the network key for accuracy, its time to find the right encryption method starting in this order.

wpa2 aes


wpa aes

wpa tkip
wep is last resort

on Jun 28, 2014 | Wireless Access Points

1 Answer

My Sony vaio has limited access to Internet but all my family's computers working are fine, help

Make sure your connecting to the right network and check if the security type (WEP,WPA,WPA-PSK) and Encryption type (TKIP,AES) setting were the same with the other computers, you can also check the setting on the router to make sure :)

Jul 18, 2010 | Sony VAIO (PCWA-A200)

1 Answer

I dont know how to get internet on my ds lite

Nintendo? You have to have a WEP key...and if your wireless encryption is not set up with a WEP key, if it has a WPA or a WPA-2 key, it won't work. You have to change the encryption on your wireless (either router or modem, whichever you are using) a browser and type in the address bar, put in your password, and change the encryption type to WEP...then put the settings in the DS.

Jun 13, 2010 | 3Com Wireless LAN Access Point 7250...

1 Answer

How do I make a secure wireless network

If you don't have the manual, you can download it here.

Look at the chapter "Setting Up Your Wireless LAN" (page 64).

Then follow the guide for "Configuring WPA on the SBG900" (page 66).
Try to avoid WEP, since it is easily hackable and only gives the sense of false security. As encryption, choose WPA AES, because it is more secure than TKIP. WPA Authentication should be "local", since you don't want to run a dedicated server.

Some older laptops cannot deal with WPA-AES. In that case you have to fall back to WEP, but try WPA first.

Furthermore you should change the ESSID from "Motorola" to something more specific for you, so other clients don't connect accidentally to your network (page 71).

If you want to enable MAC filtering is up to you and only makes sense if you never have friends or colleagues coming over with a laptop. I would leave it off and enable it at a later point, after you see that everything is running fine.

Don't forget to set up your computers as well! You have to provide the passphrase for them, otherwise they can't connect (see page 75). The way I do it is to create a strong (!) passphrase like "V0y6Mmb90y...", copy it into a text document (use notepad), and save it on a USB stick. form there you can copy it to the field, when Windows (or Mac) asks for the network key.
No typos = no headaches.

If you have any more questions, just come back here and leave a comment - I'm happy to help.

Jul 11, 2009 | Arris SURFboard SBG900 802.11g/b...

1 Answer

Internet connection drops every 15 minutes

Intermittent Connectivity:
NOTE: Before following the steps in this article, check if your wireless computers have stable connection when connected to other wireless networks (hotspots).
This article assumes that all wireless computers are experiencing intermittent wireless connection with the router.
Frequent wireless disconnection can be caused by different factors such as:
  1. Wireless interference within the network.
  2. Wireless settings of the router are still set to default.
  3. Firmware is corrupted.
Reducing Wireless Interference
If you are experiencing frequent disconnection from the wireless network, it helps if you check the following factors, all of which can greatly affect your wireless signals:
your cordless telephone system (or even your neighbors’), or other nearby equipment. Try to change your router’s channel to 1 or 11 (the default channel is 6) and restart the wireless computers.
Physical obstructions: Your router or wireless computers may be losing connectivity because of physical obstacles such as walls and floors. Try to move the equipment to different locations to find a better link.

  • Placement of the router: Mfg. suggest that you place your router as high off the ground as possible. When placing the router in a high location, leave a distance of two feet between the router antenna tips, ceiling, and wall. If your signal passes through multiple floors, place the router on the upper-most floor, and high up in the room.
  • Surroundings: Keep the router away from large metal objects, bodies of water (fish tanks, bathrooms), and any electrical equipment including television sets, microwaves, radios, etc.
Customizing Wireless Settings of the Router
Having default wireless settings on the router may cause conflict with other routers within your network range. Mfg.suggest changing the SSID (network name) and the Wireless Channel of your router. Also, if it is possible, enable the Wireless Security of your router.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

Jun 12, 2009 | 3Com 7760 (3CRWE776075US) 802.11a/b/g...

1 Answer

Setup 3Com Wireless LAN Access Point 2000 as a wireless bridge

Just u enable the DHCP in ip setting option.

then your extender PC shuld enable the dhcp automatically

Mar 27, 2009 | 3Com Wireless LAN Access Point 2000...

1 Answer

I cannot connect to the internet via my wireless network on my acer computer. however i can access it with my 4 other laptops

Please use this tip as check list if any of the mandatory settings is not clear let me know.
Check if you see the network name in your PC. (if you do not see it SSID is not broadcast OR your wireless adapter on Acer is not on same standard (801.11 a / b /g/ n) as your router (Model???).
If you see WLAN, is it secured? (= you need network key ) Please check the security standard of WLAN (WEP, WPA, AES, TKIP) and use accordinly.
If you cannot connec check if an access list is on router and insert your new PC (or disable it)

Jan 29, 2009 | WiFlyer - Portable, shareable WiFi base...

1 Answer

Wireless router connection problems

Assuming "cannot connect to linksys router directly" means you cannot connect to a Wireless Lan managed by Linksys router,
1) try to connect new computer to LinkSys Router using a Lan cable, add new PC to your network.
2) recover protocol (WEP or WPA) and Key of WLAN (Passphrase or Key: TKIP or AES) either from other PC on same network either from your Router.
3) If you missed actual key you must connect to router and reset it to a new key to be eventually used for every connected device.
Call for detail on this possibility

Dec 29, 2008 | Linksys Access Point WAP54GP Wireless-G...

1 Answer

The 21ooap acess point confoguration

I think that you trying implement NAT on this wireless access point , if you got /24 mean you can use - range.This kind of router do have few steps to go basically you have to provide WAN settings that your up link information, then your Broadcast information such as SSID,DHCP,WEP.WPA,etc.

Nov 19, 2007 | D-Link AirPlus Xtreme G DWL-2100AP...

Not finding what you are looking for?
3Com Wireless LAN Access Point 7250 802.11g/b (3crwe725075a-uk) Logo

Related Topics:

254 people viewed this question

Ask a Question

Usually answered in minutes!

Top 3Com Wireless Access Points Experts

Donna Sander

Level 2 Expert

193 Answers

 C. Dante
C. Dante

Level 3 Expert

623 Answers

Prashant  Sharma
Prashant Sharma

Level 3 Expert

1127 Answers

Are you a 3Com Wireless Access Point Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides