When this registry is modified, the YANG module iana-bgp-l2-encaps must be updated
as defined in RFC 9291.
References: RFC 6624
| Value | Defined by | Name | Description | References |
|---|---|---|---|---|
| 0 | IANA | Reserved | - | RFC 6624 |
| 1 | IANA | Frame Relay | - | RFC 4446 |
| 2 | IANA | ATM AAL5 SDU VCC transport | - | RFC 4446 |
| 3 | IANA | ATM transparent cell transport | - | RFC 4816 |
| 4 | IANA | Ethernet (VLAN) Tagged Mode | - | RFC 4448 |
| 5 | IANA | Ethernet Raw Mode | - | RFC 4448 |
| 6 | IANA | Cisco HDLC | - | RFC 4618 |
| 7 | IANA | PPP | - | RFC 4618 |
| 8 | IANA | SONET/SDH Circuit Emulation Service | - | RFC 4842 |
| 9 | IANA | ATM n-to-one VCC cell transport | - | RFC 4717 |
| 10 | IANA | ATM n-to-one VPC cell transport | - | RFC 4717 |
| 11 | IANA | IP Layer 2 Transport | - | RFC 3032 |
| 15 | IANA | Frame Relay Port mode | - | RFC 4619 |
| 17 | IANA | Structure-agnostic E1 over packet | - | RFC 4553 |
| 18 | IANA | Structure-agnostic T1 (DS1) over packet | - | RFC 4553 |
| 19 | IANA | VPLS | - | RFC 4761 |
| 20 | IANA | Structure-agnostic T3 (DS3) over packet | - | RFC 4553 |
| 21 | IANA | Nx64kbit/s Basic Service using Structure-aware | - | RFC 5086 |
| 25 | IANA | Frame Relay DLCI | - | RFC 4619 |
| 40 | IANA | Structure-agnostic E3 over packet | - | RFC 4553 |
| 41 | IANA | Octet-aligned payload for Structure-agnostic DS1 circuits | - | RFC 4553 |
| 42 | IANA | E1 Nx64kbit/s with CAS using Structure-aware | - | RFC 5086 |
| 43 | IANA | DS1 (ESF) Nx64kbit/s with CAS using Structure-aware | - | RFC 5086 |
| 44 | IANA | DS1 (SF) Nx64kbit/s with CAS using Structure-aware | - | RFC 5086 |
| 252 - 255 | IANA | Experimental Use | - | RFC 6624 |