| stp.bridge.hw | Bridge Identifier | 6-byte Hardware (MAC) Address |
| stp.flags | BPDU flags | Unsigned 8-bit integer |
| stp.forward | Forward Delay | Double-precision floating point |
| stp.hello | Hello Time | Double-precision floating point |
| stp.max_age | Max Age | Double-precision floating point |
| stp.msg_age | Message Age | Double-precision floating point |
| stp.port | Port identifier | Unsigned 16-bit integer |
| stp.protocol | Protocol Identifier | Unsigned 16-bit integer |
| stp.root.cost | Root Path Cost | Unsigned 32-bit integer |
| stp.root.hw | Root Identifier | 6-byte Hardware (MAC) Address |
| stp.type | BPDU type | Unsigned 8-bit integer |
| stp.version | Protocol Version Identifier | Unsigned 8-bit integer |