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does anyone knows what the SNAP Type 010b is and for what this packets are used ?
DLC: ----- DLC Header -----
DLC: Frame 18 arrived at 08:57:31.0333; frame size is 64 (0040 hex) bytes.
DLC: Destination = Multicast 01000CCCCCCD
DLC: Source = Station 0009127D69B2
DLC: 802.3 length = 50
LLC: ----- LLC Header -----
LLC: DSAP Address = AA, DSAP IG Bit = 00 (Individual Address)
LLC: SSAP Address = AA, SSAP CR Bit = 00 (Command)
LLC: Unnumbered frame: UI
SNAP: ----- SNAP Header -----
SNAP: Vendor ID = Cisco
SNAP: Type = 010B (Unknown)
SNAP: [42 Bytes of data]
This MAC 01000CCCCCCD looks like a Cisco BPDU send over a 802.1Q vlan other than native vlan.
0009127D69B2 should be a Cisco switch mac somewhere in your network.
Hope this helps