📡 Wireless Log Analysis Report

Catalyst 9800 Controller Analysis

Generated: 2026-02-06 16:01:37

🚨 Network Health: CRITICAL ISSUES - IMMEDIATE ATTENTION REQUIRED

Overview Statistics

520
Total Events
112
Unique Clients
294
Successful Joins
50
Auth Failures
25
DHCP Failures
31
VLAN Warnings

🔍 Most Problematic Clients

MAC Address Username SSID Auth Failures DHCP Failures Status
4845.2071.cb59 N/A N/A 3 0 Critical
1234.aaa.bbbb N/A N/A 3 0 Critical
aaaa.aaa.eeee N/A N/A 3 0 Critical
aaaa.3333.eeee N/A N/A 0 5 Critical
1122.6666.00cc N/A N/A 2 0 Warning
🔐 Authentication Failures
50 failures
Jun 4 20:24:06.759
Client: 1122.6666.00cc
Reason: No Response from Client
Jun 4 20:25:04.029
Client: 0000.1111.cccc
Reason: Timeout
Username: CN=User881@placeofbusiness.com
Jun 4 20:25:04.948
Client: 4845.2071.cb59
Reason: Timeout
Jun 4 20:30:29.545
Client: 6699.6699.1122
Reason: Timeout
Username: Contractor01
... and 30 more failures
🌐 DHCP Failures
25 failures

Root Cause: DHCP server unable to forward requests. Possible causes:

  • DHCP server not reachable on VLAN
  • IP helper-address not configured
  • DHCP relay configuration issue
Jun 4 20:23:10.915
Client: aaaa.3333.dddd
Reason: CANT FORWARD
Jun 4 20:24:10.975
Client: aaaa.3333.cccc
Reason: CANT FORWARD
Jun 4 20:25:11.154
Client: aaaa.3333.cccc
Reason: CANT FORWARD
Jun 4 20:26:11.634
Client: aaaa.3333.eeee
Reason: CANT FORWARD
Jun 4 20:27:11.991
Client: aaaa.2222.eeee
Reason: CANT FORWARD
Jun 4 20:28:12.055
Client: aabb.2222.eeee
Reason: CANT FORWARD
... and 10 more failures
⚙️ VLAN Configuration Issues
2 VLANs

Recommendation: Define missing VLANs on controller to avoid fallback behavior

Missing VLAN Fallback VLAN Occurrences
internet 999 27
GUEST-WIFI 999 4
🔄 Mobility Anchor Issues
18 failures

Root Cause: Export anchor not responding. Check connectivity to anchor controller.

Jun 4 20:25:55.726
Client: 06.f7.1f.21.aa.bb.
Anchor IP: 192.168.1.101
Jun 4 20:26:02.728
Client: 06.f7.1f.21.aa.bb.
Anchor IP: 192.168.1.101
Jun 4 20:27:59.828
Client: 06.f7.1f.21.aa.bb.
Anchor IP: 192.168.1.101
Jun 4 20:28:06.829
Client: 06.f7.1f.21.aa.bb.
Anchor IP: 192.168.1.101
Jun 4 20:31:23.140
Client: 1.f7.11.00.aa.bb.
Anchor IP: 192.168.1.101
... and 8 more failures
🔁 Clients with Frequent Reconnections
4 clients

Possible Causes: Sticky client behavior, roaming issues, or RF problems

MAC Address Username SSID Join Count
1122.3344.aabb userxx MAIN-WIFI 28
1122.3344.aacc Guest01 Guest-Wifi 126
1122.3344.00cc 00-11-aa-bb-cc-11 PUBLIC-WIFI 9