Do the access points themselves reside in the same Vlan as the clients?
If so are they on a different subnet as the clients?
Alexandre Bastos wrote:
Lee,
Thanks for your reply.
I'm not using dhcp snooping. In fact, my wlan topology is quite simple.
I plugged all AP's (with the same SSID) in a same vlan, and a linux
box (gateway and dhcp server).
We had a Catalyst 4507R as Core Switch, but the Wireless VLan it's
absolutely isolated from the network
Regards
Alexandre
Lee H Badman wrote:
Hola Alexandre,
Are you using DHCP snooping on your switchports anywhere? This could
be a factor.
-Lee
Lee H. Badman
Wireless/Network Engineer
Information Technology and Services
Syracuse University
315 443-3003
------------------------------------------------------------------------
*From:* The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:[email protected]] *On Behalf Of *Alexandre
Bastos
*Sent:* Thursday, June 04, 2009 9:04 AM
*To:* [email protected]
*Subject:* [WIRELESS-LAN] Cisco Aironet without WEP and DHCP Problem
I'm Sysadmin on University of Fortaleza, a medium-sized university
(around 25,000 students), located on Northeast of Brazil.
Our Lan e Wlan are based on Cisco devices. But now, we are
experiencing some strange behavior on our Wireless network.
Here, we deployed a simple wireless environment, since our needed are
very simple: just permit internet access to academic community from
all places in the campus.
So, we bought AP Aironet 1100 and 1200 series and put it on strategic
places on each build. Ok, it was simple. Coverage area Ok! :). But
now, I'm investigating a strange situation: the client connect on the
wlan (without WEP/WPA, etc), but it cannot receive a IP Address from
DHCP Server.
I checked my core switch, edge switches, my dhcp server (a linux
box), re-certified the cables that connect AP to edge switch, change
DHCP Server from Linux box to MS DHCP Server, and back to linux
again.. etc etc ... without successful
The problem don't have a specific period, or specific location or any
relation with some event. Just the clients cannot connect on WLan (in
fact, they connect, but don't receive a ip address). On my dhcp
server log, I saw the DHCP DISCOVER packet from client, and the DHCP
OFFER, from my DhcpServer to client. If I restart access-point, the
problem is temporary solved. (Look, this strange behavior occurs with
all 1100 and 1200 AP's, on different time, on different days, without
a logical order).
Did anyone experienced any problem like this during the deployment
of Wlan environment ?
Unfortunately our Cisco partner just limited to sell and deliver the
equipment
Sorry about my bad English, and my long post
Best Regards
--
Alexandre Bastos
--------------------------
Fundação Edson Queiroz
Universidade de Fortaleza
Gerência em Tecnologia da Informação - GTI
!DSPAM:1845,4a27cb0a49721564368344! ********** Participation and
subscription information for this EDUCAUSE Constituent Group
discussion list can be found at http://www.educause.edu/groups/.
********** Participation and subscription information for this
EDUCAUSE Constituent Group discussion list can be found at
http://www.educause.edu/groups/.
--
Alexandre Bastos
--------------------------
Fundação Edson Queiroz
Universidade de Fortaleza
Gerência em Tecnologia da Informação - GTI
********** Participation and subscription information for this
EDUCAUSE Constituent Group discussion list can be found at
http://www.educause.edu/groups/.
--
Heath Barnhart
Asst. Systems and Networking Admin
Information Systems and Services
Washburn University
Topeka, KS 66621
**********
Participation and subscription information for this EDUCAUSE Constituent Group
discussion list can be found at http://www.educause.edu/groups/.
