Packet Header
A GRE packet header structure is represented in the diagram below.
| Bits 0–4 | 5–7 | 8–12 | 13–15 | 16–31 | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | R | K | S | s | Recur | Flags | Version | Protocol Type | |||||||||||||||||||||||
| Checksum (optional) | Offset (optional) | ||||||||||||||||||||||||||||||
| Key (optional) | |||||||||||||||||||||||||||||||
| Sequence Number (optional) | |||||||||||||||||||||||||||||||
| Routing (optional) | |||||||||||||||||||||||||||||||
Read more about this topic: Generic Routing Encapsulation
Famous quotes containing the word packet:
“we know our end
A packet of worm-seed, a garden of spent tissues.”
—Allen Tate (1899–1979)