Route Distinguisher Type Field
Created
- 2005-02-15
Last Updated
- 2015-05-15
Note
Route Distinguishers are used to create VPN-IPv4 addresses, as specified in RFC 4364. The RDs are structured so that every service provider can administer its own "numbering space" (i.e., can make its own assignments of RDs), without conflicting with the RD assignmentsmade by any other service provider. An RD consists of three fields: a type field, an administrator field, and an assigned number field.
The value of the type field determines the lengths of the other two fields, as well as the semantics of the administrator field. The administrator field identifies an assigned number authority, and the assigned number field contains a number which has been assigned, by the identified authority, for a particular purpose.
Available Formats
Route Distinguisher Type Field
Reference
- RFC 4364: BGP/MPLS IP Virtual Private Networks (VPNs)
Available Formats
| Range | Registration Procedures |
|---|---|
| 0-32767 | First Come First Served |
| 32768-65535 | IETF Review |
| Type Value | Description | Reference |
|---|---|---|
| 0 | Administrator field is a two-byte Autonomous System Number | RFC 4364 |
| 1 | Administrator field is a four-byte IP Address | RFC 4364 |
| 2 | Administrator field is a four-byte Autonomous System Number | RFC 4364 |
| 3-65534 | Unassigned | |
| 65535 | For Use Only in Certain Leaf A-D Routes | RFC 7524 |