Only with ath(4) as an AP I see a lot/regular: wlan99: [ac:b5:7d:e4:bd:23] AES-CCM replay detected tid 0 <rsc 1957759 (1ddf7f), csc 1957765 (1ddf85), keyix 0 rxkeyix 65535> Card is an: ath0@pci0:1:0:0: class=0x028000 rev=0x01 hdr=0x00 vendor=0x168c device=0x0034 subvendor=0x11ad subdevice=0x6611 vendor = 'Qualcomm Atheros' device = 'AR9462 Wireless Network Adapter' and 11a only though it seems we don't actually respect that... media: IEEE 802.11 Wireless Ethernet autoselect mode 11a <hostap>