DTL-4-ARP_ORPHANPKT_DETECTED: dtl_net.c:3055 STA(Target MAC Address) _logs detected

[ahmad.syed]

Hi Team,

We are getting below logs while connecting corporate SSID .

Mar 14 16:09:03 10.127.164.114 DE-FRAN-WLC-01: *dtlArpTask: Mar 14 17:07:50.638: %DTL-4-ARP_ORPHANPKT_DETECTED: dtl_net.c:3055 STA(Target MAC Address) [90:61:ae:3c:6f:cc, 0.0.0.0] ARP (op ARP REQUEST) received with invalid SPA(Source IP Address) 10.210.2.137/TPA(Destination IP Address) 10.210.0.1

WLC has image 8.3.143.0

Any specific reason for this log. Its happening to certain system on certain location. Those system till now is windows10. Not found till now issue with windows7

[superego]

There's another post here in the community reagarding orphan packet, was solved by enabling Fast SSID change.  You can check if it applies to you.

https://community.cisco.com/t5/wireless-and-mobility/orphan-packet/td-p/1976519

How to Enable Fast SSID change:

https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-4/configuration/guides/consolidated/b_cg74_CONSOLIDATED/b_cg74_CONSOLIDATED_chapter_01001.html

[sunil_mil]

Already enabled fast ssid but still users are facing issue and getting the logs on WLC 2504