PEAP VLAN With Great Instability

Question

Hello,
I have a network running PEAP for user authentication and dynamic WEP keys generation (AP1231G, ACS 3.3 and Windows 2000 Certificate Services). All users are Windows XP or Windows 2000, with Aironet and non-Aironet Wireless cards.
Regardless the card used, the PEAP VLAN is running too unstable. Users authenticate, but very often (in periods of some few minutes) they are suddenly unauthenticated and connection goes off. I have an open VLAN, running with no WEP, before a BBSM authentication, which works very nice (connection is quite stable).
So, it seems problem is not on Access Points, but in something related to EAP authentication, once I have also noticed the same symptoms in an LEAP network, previously, and open VLANs work well.
Has someone faced such or a similar issue? Do you have any hint for solving this connection instability?
Thanks in advance,
Leonidas

Answer 1

We experenced similar symptoms. Our problem resulted from us entering an encryption key for the vlan on the AP. When we removed the encryption key and left encryption vlan XX mode wep mandatory
our problem ceased and the connection became stable. The AP and the ACS negotiate the WEP key automatically.
Hope this helps