User's Manual

C-16
Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-11350-01
Appendix C Error and Event Messages
802.11 Subsystem Messages
Error Message DOT11-4-CCMP_REPLAY: “AES-CCMP TSC replay was detected on packet (TSC
0x%11x received from &e).”
Explanation
AES-CCMP TSC replay was indicated on a frame. A replay of the AES-CCMP TSC in
a received packet almost indicates an active attack.
Recommended Action None.
Recommended Action
Error Message DOT11-4-CKIP_MIC_FAILURE: “CKIP MIC failure was detected on a packet
(Digest 0x%x) received from %e).”
Explanation
CKIP MIC failure was detected on a frame. A failure of the CKIP MIC in a received
packet almost indicates an active attack.
Recommended Action None.
Error Message DOT11-4-CKIP_REPLAY: “CKIP SEQ replay was detected on a packet (SEQ
0x&x) received from %e.”
Explanation
CKIP SEQ replay was detected on a frame. A replay of the CKIP SEQ in a received
packet almost indicates an active attack.”
Recommended Action None.
Error Message DOT11-4-TKIP_MIC_FAILURE: “Received TKIP Michael MIC failure report
from the station %e on the packet (TSC=0x%11x) encrypted and protected by %s key.”
Explanation
TKIP Michael MIC failure was detected from the indicated station on a unicast frame
decrypted locally with the indicated pairwise key.
Recommended Action A failure of the Michael MIC in a received packet might indicate an active
attack on your network. Search for and remove potential rogue devices from your wireless LAN.
This failure might also indicate a misconfigured client or a faulty client.
Error Message DOT11-4-TKIP_MIC_FAILURE_REPORT: “Received TKIP Michael MIC failure
report from the station %e on the packet (TSC=0x0) encrypted and protected by %s
key
Explanation
The access point received an EAPOL-key from the indicated station notifying the access
point that TKIP Michael MIC failed on a packet transmitted by this access point.
Recommended Action None.