what is this kind of frames, vlan, SMLT?

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i've coded a sniffer with libpcap dealing with data link layer. but i've implemented only the ethernet part. Since this morning, i receive this kind of frame all day long. Could you help me to find the protocol used there and the layer ? Thx

FF FF FF FF FF FF 0A 61 FC 80 B6 EF 26 00 00 00 AF 81 01 00 61 65 72 6F 68 69 76 65 20 67 72 61 74 75 69 74 6F 75 73 20 61 72 70 2C 20 61 70 5F 6D 61 63 3D 66 34 65 61 3A 62 35 36 35 3A 33 61 30 30 2C 20 69 70 3D 31 30 2E 31 33 36 2E 31 2E 34 34 2C 20 73 65 71 3D 32 37 65 61 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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2
On

FF FF FF FF FF FF

destination MAC

0A 61 FC 80 B6 EF

source MAC

26 00

Ethertype

00 00 AF 81 01 00 61 65 72 6F 68 69 76 65 20 67 72 61 74 75 69 74 6F 75 73 20 61 72 70 2C 20 61 70 5F 6D 61 63 3D 66 34 65 61 3A 62 35 36 35 3A 33 61 30 30 2C 20 69 70 3D 31 30 2E 31 33 36 2E 31 2E 34 34 2C 20 73 65 71 3D 32 37 65 61 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Data: ÿÿÿÿÿÿ aü¶ï&¯aerohive gratuitous arp, ap_mac=f4ea:b565:3a00, ip=10.136.1.44, seq=27ea