References: RFC 4271, RFC 7313
| Value | Defined by | Name | Description | References |
|---|---|---|---|---|
| 0 | IANA | Reserved | - | - |
| 1 | IANA | Message Header Error | - | RFC 4271 |
| 2 | IANA | OPEN Message Error | - | RFC 4271 |
| 3 | IANA | UPDATE Message Error | - | RFC 4271 |
| 4 | IANA | Hold Timer Expired | - | RFC 4271 |
| 5 | IANA | Finite State Machine Error | - | RFC 4271 |
| 6 | IANA | Cease | - | RFC 4271 |
| 7 | IANA | ROUTE-REFRESH Message Error | - | RFC 7313 |