( Border Gateway Protocol )
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Marker - - - | |||||||||||||||||||||||||||||||
| Length | Type | Message Body | |||||||||||||||||||||||||||||
| Message Body - - ....................... |
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Marker: 16 bytes used for Synchronization and authentication (marker initially set to all "1" in Open message; then marker is encoded to confirm authenticity) Length: 2 bytes = total length of message in bytes (19 < n <= 4096) Type: 1 byte 1 = Open 2 = Update 3 = Notification 4 = Keepalive 5 = Route Refresh Message Body: Variable contains data fields applicable to particular msg type