Header
...--------+--------+--------+
MAC Header | 802.{3/4/5} MAC
...--------+--------+--------+
+--------+--------+--------+
| DSAP=K1| SSAP=K1| Control| 802.2 LLC
+--------+--------+--------+
+--------+--------+---------+--------+--------+
|Protocol Id or Org Code =K2| EtherType | 802.2 SNAP
+--------+--------+---------+--------+--------+
The total length of the LLC Header and the SNAP header is 8-octets, making the 802.2 protocol overhead come out on an nice boundary.
The K1 value is 170 (decimal).
The K2 value is 0 (zero).
The control value is 3 (Unnumbered Information).