My client has a wireless setup consisting of a WLC 2112 and about 7 1131AG LWAPPs. There are two SSIDs, say CORP(mapped to VLAN 900) and GUEST(mapped to VLAN 901). Wireless clients get IP through DHCP. DHCP IP is configured in the Dynamic interface.
The problem is sometimes (not always), clients connecting to SSID CORP get a DHCP IP assigned for GUEST VLAN(VLAN 901).
Since it is happening randomly, clueless as to what is causing the problem.
P.S Just to add though this could be irrelevant, only after making VLAN ID of the admin interface and AP Manager interface as '0', the APs could talk to the WLC and i was able to http to the WLC from the LAN.(WLC Mgmt, AP Mgmt IPs and AP Manager interface are in same VLAN).
It sounds like the client may be connecting to the guest WLAN first, then connecting to the Corp WLAN.
As to the VLAN setting. 0 in the WLC means untagged. If your switchport has the switchport trunk native valn < x > command you would need to be untagged. Otherwise the switch would get a packet tagged with the native vlan, and then drop the traffic.
***if your management is in VLAN 1, the above is true with out the native setting, as VLAN 1 is native by default
Are you using AP groups on your WLC? If you're using AP groups and you add a SSID into an AP group, you have to specify which interface ties to which SSID. Sometimes it's easy to misconfig a SSID when adding groups. The situation I am referring to would give the same issue which you are describing.
The only reason I know about this issue is because I've done it a few times
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
This is the start of a display filter cross reference between Wireshark and OmniPeek.
The 1st installment is a table of advanced filters. More filters will be added as time allows.
It is a living doc, so check back for changes every so often
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I have created a Powershell script to automatically add a Wireless Guest User on Cisco WLCs. (tested on 2500 Series)
The script should be completely self explanatory.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...