References: RFC 4271
| Value | Defined by | Name | Description | References |
|---|---|---|---|---|
| 0 | IANA | Unspecific | - | RFC Errata 4493 |
| 1 | IANA | Malformed Attribute List | - | RFC 4271 |
| 2 | IANA | Unrecognized Well-known Attribute | - | RFC 4271 |
| 3 | IANA | Missing Well-known Attribute | - | RFC 4271 |
| 4 | IANA | Attribute Flags Error | - | RFC 4271 |
| 5 | IANA | Attribute Length Error | - | RFC 4271 |
| 6 | IANA | Invalid ORIGIN Attribute | - | RFC 4271 |
| 7 | IANA | [Deprecated] | - | RFC 4271 |
| 8 | IANA | Invalid NEXT_HOP Attribute | - | RFC 4271 |
| 9 | IANA | Optional Attribute Error | - | RFC 4271 |
| 10 | IANA | Invalid Network Field | - | RFC 4271 |
| 11 | IANA | Malformed AS_PATH | - | RFC 4271 |