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WLC 5520 - Clients Unable to Auth 802.1X to Radius intermittently

Colton
Level 1
Level 1

Good Day,

 

I have received several reports over time from the same physical location regard their inability to authenticate to an 802.1X WLAN (Radius server online and reachable with no errors on the server.) Generally, it will only be a handful of APs that cause this and while the issue is on-going the clients at my other locations and/or APs are generally fine. I can fix it with a hard reset of the AP but I feel like there is something reoccuring that is causing this issue and would like to try and identify it.

 

Technology Consists of Chromebooks, Apple Equipment and Android Phones primarily.

For this Location I have 13 x 1810W Access Points running in FlexConnect Mode with Local Switching:

(Something to note is I have noticed that occasionally the APs are giving out their own VLAN IP instead of the IP specified on the WLAN. An example is a Client connecting to AP and having a 10.45.x.x IP (VLAN 45) instead of a 10.10.X.X IP (VLAN 10) on WLAN ID 7 but the client still has a VLAN id of 10 in the client details despite proper settings)

 

WLC-5520 

Version: 8.3.143.0

 

I will provide any details/logs to the best of my ability,

Thank you for your time and consideration

 

Output for the WLAN:

(Cisco Controller) show>wlan 7


WLAN Identifier.................................. 7
Profile Name..................................... *********
Network Name (SSID).............................. ********
Status........................................... Enabled
MAC Filtering.................................... Disabled
Broadcast SSID................................... Enabled
AAA Policy Override.............................. Disabled
Network Admission Control
Client Profiling Status
Radius Profiling ............................ Disabled
DHCP ....................................... Disabled
HTTP ....................................... Disabled
Local Profiling ............................. Enabled
DHCP ....................................... Enabled (Auto)
HTTP ....................................... Enabled (Auto)
Radius-NAC State............................... Disabled
SNMP-NAC State................................. Disabled
Quarantine VLAN................................ 0
Maximum Clients Allowed.......................... Unlimited
Maximum number of Clients per AP Radio........... 200

--More-- or (q)uit
ATF Policy....................................... 0
Number of Active Clients......................... 71
Exclusionlist Timeout............................ 60 seconds
Session Timeout.................................. 86400 seconds
User Idle Timeout................................ Disabled
Sleep Client..................................... disable
Sleep Client Timeout............................. 720 minutes
User Idle Threshold.............................. 0 Bytes
NAS-identifier................................... none
CHD per WLAN..................................... Enabled
Webauth DHCP exclusion........................... Disabled
Interface........................................ vlan-10
Multicast Interface.............................. Not Configured
WLAN IPv4 ACL.................................... unconfigured
WLAN IPv6 ACL.................................... unconfigured
WLAN Layer2 ACL.................................. unconfigured
WLAN URL ACL..................................... unconfigured
mDNS Status...................................... Disabled
mDNS Profile Name................................ unconfigured
DHCP Server...................................... Default
DHCP Address Assignment Required................. Disabled
Static IP client tunneling....................... Disabled
Tunnel Profile................................... Unconfigured

--More-- or (q)uit
PMIPv6 Mobility Type............................. none
PMIPv6 MAG Profile........................... Unconfigured
PMIPv6 Default Realm......................... Unconfigured
PMIPv6 NAI Type.............................. Hexadecimal
PMIPv6 MAG location.......................... AP
Quality of Service............................... Silver
Per-SSID Rate Limits............................. Upstream Downstream
Average Data Rate................................ 0 0
Average Realtime Data Rate....................... 0 0
Burst Data Rate.................................. 0 0
Burst Realtime Data Rate......................... 0 0
Per-Client Rate Limits........................... Upstream Downstream
Average Data Rate................................ 0 0
Average Realtime Data Rate....................... 0 0
Burst Data Rate.................................. 0 0
Burst Realtime Data Rate......................... 0 0
Scan Defer Priority.............................. 4,5,6
Scan Defer Time.................................. 100 milliseconds
WMM.............................................. Allowed
WMM UAPSD Compliant Client Support............... Disabled
Media Stream Multicast-direct.................... Disabled
CCX - AironetIe Support.......................... Disabled
CCX - Gratuitous ProbeResponse (GPR)............. Disabled

--More-- or (q)uit
CCX - Diagnostics Channel Capability............. Disabled
Dot11-Phone Mode (7920).......................... Disabled
Wired Protocol................................... 802.1P (Tag=0)
Passive Client Feature........................... Disabled
Peer-to-Peer Blocking Action..................... Disabled
Radio Policy..................................... All
DTIM period for 802.11a radio.................... 1
DTIM period for 802.11b radio.................... 1
Radius Servers
Authentication................................ 10.250.130.104 1812 *
Accounting.................................... Global Servers
Interim Update............................. Enabled
Interim Update Interval.................... 0
Framed IPv6 Acct AVP ...................... Prefix
Dynamic Interface............................. Disabled
Dynamic Interface Priority.................... wlan
Local EAP Authentication......................... Disabled
Radius NAI-Realm................................. Disabled
Mu-Mimo.......................................... Enabled
Security

802.11 Authentication:........................ Open System
FT Support.................................... Disabled

--More-- or (q)uit
Static WEP Keys............................... Disabled
802.1X........................................ Disabled
Wi-Fi Protected Access (WPA/WPA2)............. Enabled
WPA (SSN IE)............................... Enabled
TKIP Cipher............................. Enabled
AES Cipher.............................. Disabled
WPA2 (RSN IE).............................. Enabled
TKIP Cipher............................. Disabled
AES Cipher.............................. Enabled
CCMP256 Cipher.......................... Disabled
GCMP128 Cipher.......................... Disabled
GCMP256 Cipher.......................... Disabled
OSEN IE.................................... Disabled
Auth Key Management
802.1x.................................. Enabled
PSK..................................... Disabled
CCKM.................................... Enabled
FT-1X(802.11r).......................... Disabled
FT-PSK(802.11r)......................... Disabled
PMF-1X(802.11w)......................... Disabled
PMF-PSK(802.11w)........................ Disabled
OSEN-1X................................. Disabled
SUITEB-1X............................... Disabled

--More-- or (q)uit
SUITEB192-1X............................ Disabled
FT Reassociation Timeout................... 20
FT Over-The-DS mode........................ Enabled
GTK Randomization.......................... Disabled
SKC Cache Support.......................... Disabled
CCKM TSF Tolerance......................... 1000
Wi-Fi Direct policy configured................ Disabled
EAP-Passthrough............................... Disabled
CKIP ......................................... Disabled
Web Based Authentication...................... Disabled
Web Authentication Timeout.................... 300
Web-Passthrough............................... Disabled
Mac-auth-server............................... 0.0.0.0
Web-portal-server............................. 0.0.0.0
Conditional Web Redirect...................... Disabled
Splash-Page Web Redirect...................... Disabled
Auto Anchor................................... Disabled
FlexConnect Local Switching................... Enabled
FlexConnect Central Association............... Disabled
flexconnect Central Dhcp Flag................. Disabled
flexconnect nat-pat Flag...................... Disabled
flexconnect Dns Override Flag................. Disabled
flexconnect PPPoE pass-through................ Disabled

--More-- or (q)uit
flexconnect local-switching IP-source-guar.... Disabled
FlexConnect Vlan based Central Switching ..... Disabled
FlexConnect Local Authentication.............. Disabled
FlexConnect Learn IP Address.................. Enabled
Client MFP.................................... Optional
PMF........................................... Disabled
PMF Association Comeback Time................. 1
PMF SA Query RetryTimeout..................... 200
Tkip MIC Countermeasure Hold-down Timer....... 60
Eap-params.................................... Disabled
AVC Visibilty.................................... Enabled
AVC Profile Name................................. None
Flex Avc Profile Name............................ None
Flow Monitor Name................................ None
Split Tunnel Configuration
Split Tunnel................................. Disabled
Call Snooping.................................... Disabled
Roamed Call Re-Anchor Policy..................... Disabled
SIP CAC Fail Send-486-Busy Policy................ Enabled
SIP CAC Fail Send Dis-Association Policy......... Disabled
KTS based CAC Policy............................. Disabled
Assisted Roaming Prediction Optimization......... Disabled
802.11k Neighbor List............................ Disabled

--More-- or (q)uit
802.11k Neighbor List Dual Band.................. Disabled
802.11v Directed Multicast Service............... Disabled
802.11v BSS Max Idle Service..................... Enabled
802.11v BSS Transition Service................... Disabled
802.11v BSS Transition Disassoc Imminent......... Disabled
802.11v BSS Transition Disassoc Timer............ 200
802.11v BSS Transition OpRoam Disassoc Timer..... 40
DMS DB is empty
Band Select...................................... Enabled
Load Balancing................................... Client-Count Based
Multicast Buffer................................. Disabled
Universal Ap Admin............................... Disabled
Broadcast Tagging................................ Disabled

Mobility Anchor List
WLAN ID IP Address Status Priority
------- --------------- ------ --------

802.11u........................................ Disabled

MSAP Services.................................. Disabled

Local Policy

--More-- or (q)uit
----------------
Priority Policy Name
-------- ---------------

Lync State ...................................... Disabled
Audio QoS Policy................................. Silver
Video QoS Policy................................. Silver
App-Share QoS Policy............................. Silver
File Transfer QoS Policy......................... Silver
QoS Fastlane Status.............................. Disable
Selective Reanchoring Status..................... Disable

 

 

3 Replies 3

patoberli
VIP Alumni
VIP Alumni
As you are using Radius servers, make sure they don't send a policy overwriting the configured VLAN on the SSID.

Hi @patoberli 

I just reviewed the Radius Server for Wireless and have identified no active policy that should be overwriting the configured VLAN on SSID at this time.

 

Good spot to check though,

Thank you for that :)

Ok, in that case I suggest you do some DHCP packet capturing on the client and see if it receives the Offers from the correct server/range.

Also, 8.3.150.0 was recently released and fixes various other bugs. 

https://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/crn83mr5.html

 

Oh, just found this bug in the release notes, which is still open: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz11374

I suggest you open a TAC actually.

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