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Internet Assigned Numbers Authority
Border Gateway Protocol (BGP) Parameters
Last Updated
2023-08-15
Available Formats
[IMG]
XML [IMG]
HTML [IMG]
Plain text
Registries included below
• BGP Message Types
• BGP Path Attributes
• BGP Error (Notification) Codes
• BGP Error Subcodes
• Message Header Error subcodes
• OPEN Message Error subcodes
• UPDATE Message Error subcodes
• BGP Finite State Machine Error Subcodes
• BGP Cease NOTIFICATION message subcodes
• BGP ROUTE-REFRESH Message Error subcodes
• BGP Outbound Route Filtering (ORF) Types
• BGP OPEN Optional Parameter Types
• BGP Tunnel Encapsulation Attribute Tunnel Types
• BGP Tunnel Encapsulation Attribute Sub-TLVs
• BGP Layer 2 Encapsulation Types
• BGP Layer 2 TLV Types
• BGP AIGP Attribute Types
• BGP Route Refresh Subcodes
• P-Multicast Service Interface Tunnel (PMSI Tunnel) Tunnel Types
• P-Multicast Service Interface (PMSI) Tunnel Attribute Flags
• BGP MCAST-VPN Route Types
• BGP Prefix-SID TLV Types
• BGP Prefix-SID Label-Index TLV Flags
• BGP Prefix-SID Originator SRGB TLV Flags
• BGP Graceful Restart Flags
• BGP Graceful Restart Flags for Address Family
• SFP Attribute TLVs
• SFP Association Type
• SFC SPI/SI Representation Flags
• BFD Mode
• BFD Discriminator Optional TLV Type
• SRv6 Service Sub-TLV Types
• SRv6 Service Data Sub-Sub-TLV Types
• BGP SRv6 Service SID Flags
• Long-lived Graceful Restart Flags for Address Family
BGP Message Types
Registration Procedure(s)
Standards Action
Reference
[RFC 4271]
Available Formats
[IMG]
CSV
Value Name Reference
0 Reserved
1 OPEN [RFC 4271]
2 UPDATE [RFC 4271]
3 NOTIFICATION [RFC 4271]
4 KEEPALIVE [RFC 4271]
5 ROUTE-REFRESH [RFC 2918]
6-255 Unassigned
BGP Path Attributes
Registration Procedure(s)
Standards Action
Reference
[RFC 4271]
Available Formats
[IMG]
CSV
Value Code Reference
0 Reserved
1 ORIGIN [RFC 4271]
2 AS_PATH [RFC 4271]
3 NEXT_HOP [RFC 4271]
4 MULTI_EXIT_DISC [RFC 4271]
5 LOCAL_PREF [RFC 4271]
6 ATOMIC_AGGREGATE [RFC 4271]
7 AGGREGATOR [RFC 4271]
8 COMMUNITIES [RFC 1997]
9 ORIGINATOR_ID [RFC 4456]
10 CLUSTER_LIST [RFC 4456]
11 DPA (deprecated) [Chen, E., Bates, T., "Destination Preference Attribute for BGP", Work in progress, March 1996.][RFC 6938]
ADVERTISER
12 (historic) [RFC 1863][RFC 4223][RFC 6938]
(deprecated)
RCID_PATH /
13 CLUSTER_ID [RFC 1863][RFC 4223][RFC 6938]
(Historic)
(deprecated)
14 MP_REACH_NLRI [RFC 4760]
15 MP_UNREACH_NLRI [RFC 4760]
16 EXTENDED [Eric_Rosen][draft-ramachandra-bgp-ext-communities-00][RFC 4360]
COMMUNITIES
17 AS4_PATH [RFC 6793]
18 AS4_AGGREGATOR [RFC 6793]
SAFI Specific
19 Attribute (SSA) [Gargi_Nalawade][draft-kapoor-nalawade-idr-bgp-ssa-00][draft-nalawade-idr-mdt-safi-00][draft-wijnands-mt-discovery-00]
(deprecated)
Connector
20 Attribute [RFC 6037]
(deprecated)
21 AS_PATHLIMIT [draft-ietf-idr-as-pathlimit]
(deprecated)
22 PMSI_TUNNEL [RFC 6514]
23 Tunnel [RFC 9012]
Encapsulation
24 Traffic [RFC 5543]
Engineering
IPv6 Address
25 Specific Extended [RFC 5701]
Community
26 AIGP [RFC 7311]
27 PE Distinguisher [RFC 6514]
Labels
BGP Entropy Label
28 Capability [RFC 6790][RFC 7447]
Attribute
(deprecated)
29 BGP-LS Attribute [RFC-ietf-idr-RFC 7752bis-16]
30 Deprecated [RFC 8093]
31 Deprecated [RFC 8093]
32 LARGE_COMMUNITY [RFC 8092]
33 BGPsec_Path [RFC 8205]
BGP Community
Container
Attribute
(TEMPORARY -
registered
34 2017-07-28, [draft-ietf-idr-wide-bgp-communities-11]
extension
registered
2023-07-13,
expires
2024-07-28)
35 Only to Customer [RFC 9234]
(OTC)
BGP Domain Path
(D-PATH)
(TEMPORARY -
registered
36 2019-07-08, [draft-ietf-bess-evpn-ipvpn-interworking-06]
extension
registered
2023-07-10,
expires
2024-07-08)
37 SFP attribute [RFC 9015]
38 BFD Discriminator [RFC 9026]
BGP Router
Capabilities
(RCA) (TEMPORARY
39 - registered [draft-ietf-idr-entropy-label-01]
2022-12-20,
expires
2023-12-20)
40 BGP Prefix-SID [RFC 8669]
41-127 Unassigned
128 ATTR_SET [RFC 6368]
129 Deprecated [RFC 8093]
130-240 Unassigned
241 Deprecated [RFC 8093]
242 Deprecated [RFC 8093]
243 Deprecated [RFC 8093]
244-254 Unassigned
255 Reserved for [RFC 2042]
development
BGP Error (Notification) Codes
Registration Procedure(s)
Standards Action
Reference
[RFC 4271][RFC 7313]
Available Formats
[IMG]
CSV
Value Name Reference
0 Reserved
1 Message Header Error [RFC 4271]
2 OPEN Message Error [RFC 4271]
3 UPDATE Message Error [RFC 4271]
4 Hold Timer Expired [RFC 4271]
5 Finite State Machine Error [RFC 4271]
6 Cease [RFC 4271]
7 ROUTE-REFRESH Message Error [RFC 7313]
8-255 Unassigned
BGP Error Subcodes
Registration Procedure(s)
Standards Action
Reference
[RFC 4271]
Message Header Error subcodes
Registration Procedure(s)
Standards Action
Reference
[RFC 4271]
Available Formats
[IMG]
CSV
Value Name Reference
0 Unspecific [RFC Errata 4493]
1 Connection Not Synchronized [RFC 4271]
2 Bad Message Length [RFC 4271]
3 Bad Message Type [RFC 4271]
4-255 Unassigned
OPEN Message Error subcodes
Registration Procedure(s)
Standards Action
Reference
[RFC 4271]
Available Formats
[IMG]
CSV
Value Name Reference
0 Unspecific [RFC Errata 4493]
1 Unsupported Version Number [RFC 4271]
2 Bad Peer AS [RFC 4271]
3 Bad BGP Identifier [RFC 4271]
4 Unsupported Optional Parameter [RFC 4271]
5 [Deprecated] [RFC 4271]
6 Unacceptable Hold Time [RFC 4271]
7 Unsupported Capability [RFC 5492]
8 Deprecated [RFC 9234]
9 Deprecated [RFC 9234]
10 Deprecated [RFC 9234]
11 Role Mismatch [RFC 9234]
12-255 Unassigned
UPDATE Message Error subcodes
Registration Procedure(s)
Standards Action
Reference
[RFC 4271]
Available Formats
[IMG]
CSV
Value Name Reference
0 Unspecific [RFC Errata 4493]
1 Malformed Attribute List [RFC 4271]
2 Unrecognized Well-known Attribute [RFC 4271]
3 Missing Well-known Attribute [RFC 4271]
4 Attribute Flags Error [RFC 4271]
5 Attribute Length Error [RFC 4271]
6 Invalid ORIGIN Attribute [RFC 4271]
7 [Deprecated] [RFC 4271]
8 Invalid NEXT_HOP Attribute [RFC 4271]
9 Optional Attribute Error [RFC 4271]
10 Invalid Network Field [RFC 4271]
11 Malformed AS_PATH [RFC 4271]
12-255 Unassigned
BGP Finite State Machine Error Subcodes
Registration Procedure(s)
Standards Action
Reference
[RFC 6608]
Available Formats
[IMG]
CSV
Value Name Reference
0 Unspecified Error [RFC 6608]
1 Receive Unexpected Message in OpenSent State [RFC 6608]
2 Receive Unexpected Message in OpenConfirm State [RFC 6608]
3 Receive Unexpected Message in Established State [RFC 6608]
4-255 Unassigned
BGP Cease NOTIFICATION message subcodes
Registration Procedure(s)
Standards Action or Early IANA Allocation process
Reference
[RFC 4486]
Available Formats
[IMG]
CSV
Value Name Reference
0 Reserved
1 Maximum Number of Prefixes Reached [RFC 4486]
2 Administrative Shutdown [RFC 4486][RFC 9003]
3 Peer De-configured [RFC 4486]
4 Administrative Reset [RFC 4486][RFC 9003]
5 Connection Rejected [RFC 4486]
6 Other Configuration Change [RFC 4486]
7 Connection Collision Resolution [RFC 4486]
8 Out of Resources [RFC 4486]
9 Hard Reset [RFC 8538]
10 BFD Down [RFC 9384]
11-255 Unassigned
BGP ROUTE-REFRESH Message Error subcodes
Reference
[RFC 7313]
Available Formats
[IMG]
CSV
Range Registration Procedures
0-127 Standards Action
128-255 First Come First Served
Value Name Reference
0 Reserved [RFC 7313]
1 Invalid Message Length [RFC 7313]
2-255 Unassigned
BGP Outbound Route Filtering (ORF) Types
Reference
[RFC 5291]
Available Formats
[IMG]
CSV
Range Registration Procedures Note
0-63 Standards Action
64-127 First Come First Served
128-255 Vendor-Specific IANA does not assign
Value Description Reference
0 Reserved [RFC 5291]
1-63 Unassigned
64 Address Prefix ORF [RFC 5292]
65 CP-ORF [RFC 7543]
66-127 Unassigned
128-255 Reserved for Vendor-Specific [RFC 5291]
BGP OPEN Optional Parameter Types
Registration Procedure(s)
IETF Review
Reference
[RFC 5492]
Available Formats
[IMG]
CSV
Value Name Reference
0 Reserved [RFC 5492]
1 Authentication (deprecated) [RFC 4271][RFC 5492]
2 Capabilities [RFC 5492]
3-254 Unassigned
255 Extended Length [RFC 9072]
BGP Tunnel Encapsulation Attribute Tunnel Types
Reference
[RFC 9012]
Note
Moved to [https://www.iana.org/assignments/bgp-tunnel-encapsulation] per [RFC 9012].
BGP Tunnel Encapsulation Attribute Sub-TLVs
Reference
[RFC 9012]
Note
Moved to [https://www.iana.org/assignments/bgp-tunnel-encapsulation] per [RFC 9012].
BGP Layer 2 Encapsulation Types
Reference
[RFC 6624]
Note
When this registry is modified, the YANG module [iana-bgp-l2-encaps] must be updated
as defined in [RFC 9291].
Available Formats
[IMG]
CSV
Range Registration Procedures
0-127 Expert Review
128-251 First Come First Served
252-255 Experimental Use
Value Description Reference
0 Reserved [RFC 6624]
1 Frame Relay [RFC 4446]
2 ATM AAL5 SDU VCC transport [RFC 4446]
3 ATM transparent cell transport [RFC 4816]
4 Ethernet (VLAN) Tagged Mode [RFC 4448]
5 Ethernet Raw Mode [RFC 4448]
6 Cisco HDLC [RFC 4618]
7 PPP [RFC 4618]
8 SONET/SDH Circuit Emulation Service [RFC 4842]
9 ATM n-to-one VCC cell transport [RFC 4717]
10 ATM n-to-one VPC cell transport [RFC 4717]
11 IP Layer 2 Transport [RFC 3032]
12-14 Unassigned
15 Frame Relay Port mode [RFC 4619]
16 Unassigned
17 Structure-agnostic E1 over packet [RFC 4553]
18 Structure-agnostic T1 (DS1) over packet [RFC 4553]
19 VPLS [RFC 4761]
20 Structure-agnostic T3 (DS3) over packet [RFC 4553]
21 Nx64kbit/s Basic Service using Structure-aware [RFC 5086]
22-24 Unassigned
25 Frame Relay DLCI [RFC 4619]
25-39 Unassigned
40 Structure-agnostic E3 over packet [RFC 4553]
41 Octet-aligned payload for Structure-agnostic DS1 circuits [RFC 4553]
42 E1 Nx64kbit/s with CAS using Structure-aware [RFC 5086]
43 DS1 (ESF) Nx64kbit/s with CAS using Structure-aware [RFC 5086]
44 DS1 (SF) Nx64kbit/s with CAS using Structure-aware [RFC 5086]
45-127 Unassigned
128-251 Unassigned
252-255 Experimental Use [RFC 6624]
BGP Layer 2 TLV Types
Reference
[RFC 6624]
Available Formats
[IMG]
CSV
Range Registration Procedures
0-127 Expert Review
128-251 First Come First Served
252-255 Experimental Use
Value Description Reference
0 Reserved [RFC 6624]
1 Circuit Status Vector [RFC 6624]
2-127 Unassigned
128-251 Unassigned
252-255 Experimental Use [RFC 6624]
BGP AIGP Attribute Types
Registration Procedure(s)
Standards Action
Reference
[RFC 7311]
Available Formats
[IMG]
CSV
Value Description Reference
0 Reserved [RFC 7311]
1 AIGP [RFC 7311]
2-255 Unassigned
BGP Route Refresh Subcodes
Reference
[RFC 7313]
Available Formats
[IMG]
CSV
Range Registration Procedures
0-127 Standards Action
128-254 First Come First Served
Value Code Reference
0 Route-Refresh [RFC 2918][RFC 5291]
1 BoRR [RFC 7313]
2 EoRR [RFC 7313]
3-254 Unassigned
255 Reserved [RFC 7313]
P-Multicast Service Interface Tunnel (PMSI Tunnel) Tunnel Types
Reference
[RFC 7385][RFC 8317]
Note
The status of value 0xFF may only be changed through Standards Action [RFC 8126].
Available Formats
[IMG]
CSV
Range Registration Procedures
0x00-0x7A IETF Review
0x7B-0x7E Experimental Use
0x80-0xFA Composite Tunnel
0xFB-0xFE Experimental Use
0xFF Standards Action
Value Meaning Reference
0x00 no tunnel information present [RFC 6514]
0x01 RSVP-TE P2MP LSP [RFC 6514]
0x02 mLDP P2MP LSP [RFC 6514]
0x03 PIM-SSM Tree [RFC 6514]
0x04 PIM-SM Tree [RFC 6514]
0x05 BIDIR-PIM Tree [RFC 6514]
0x06 Ingress Replication [RFC 6514]
0x07 mLDP MP2MP LSP [RFC 6514]
0x08 Transport Tunnel [RFC 7524]
0x09 Unassigned
0x0A Assisted-Replication Tunnel [RFC-ietf-bess-evpn-optimized-ir-12]
0x0B BIER [RFC 8556]
0x0C SR-MPLS P2MP Tree (TEMPORARY - registered 2020-12-09, extension registered 2021-10-19, expires [draft-ietf-bess-mvpn-evpn-sr-p2mp-06]
2022-12-09)
0x0D-0x7A Unassigned
0x7B-0x7E Reserved for Experimental Use [RFC 8317]
0x7F Reserved [RFC 8317]
0x80-0xFA Reserved for Composite Tunnel [RFC 8317]
0xFB-0xFE Reserved for Experimental Use [RFC 7385]
0xFF wildcard transport tunnel type [RFC 8338]
P-Multicast Service Interface (PMSI) Tunnel Attribute Flags
Registration Procedure(s)
Standards Action
Reference
[RFC 7902]
Available Formats
[IMG]
CSV
Value Name Reference
0 Unassigned
1 Extension [RFC 7902]
2 Leaf Information Required per-Flow (LIR-pF) [RFC 8534]
3-4 Assisted-Replication Type (T) [RFC-ietf-bess-evpn-optimized-ir-12]
5 Broadcast and Multicast (BM) [RFC-ietf-bess-evpn-optimized-ir-12]
6 Unknown (U) [RFC-ietf-bess-evpn-optimized-ir-12]
7 Leaf Information Required (L) [RFC 6514]
BGP MCAST-VPN Route Types
Registration Procedure(s)
Standards Action
Reference
[RFC 7441][RFC 6514]
Note
Values may be assigned from one of several ranges:
- Range 0x01-0x3f: Generic/PIM Range. Values are assigned from
this range when the NLRI format associated with the route type
presupposes that PIM or IGMP is the C-multicast control protocol,
or when the NLRI format associated with the route type is
independent of the C-multicast control protocol.
- Range 0x43-0x7f: mLDP Range. Values are assigned from this range
when the NLRI format associated with the route type presupposes
that mLDP is the C-multicast control protocol.
- Range 0x80-0xff: This range is reserved; values should not be
assigned from this range.
In general, whenever an assignment is requested from this registry,
two codepoints should be requested at the same time: one from the
Generic/PIM range (0x01-0x3f) and one from the mLDP range (0x43-0x7f).
The two codepoints should have the same low-order 6 bits. If one of
the two codepoints is not actually needed, it should be registered
anyway, and marked as "Reserved."
Available Formats
[IMG]
CSV
Value Meaning Reference
0x00 Reserved [RFC 7441][RFC 6514]
0x01 Intra-AS I-PMSI A-D route [RFC 7441][RFC 6514]
0x02 Inter-AS I-PMSI A-D route [RFC 7441][RFC 6514]
0x03 S-PMSI A-D route [RFC 7441][RFC 6514]
0x04 Leaf A-D route [RFC 7441][RFC 6514]
0x05 Source Active A-D route [RFC 7441][RFC 6514]
0x06 Shared Tree Join route [RFC 7441][RFC 6514]
0x07 Source Tree Join route [RFC 7441][RFC 6514]
0x08-0x3f Unassigned (Generic/PIM range)
0x40-0x42 Reserved [RFC 7441]
0x43 S-PMSI A-D route for C-multicast mLDP [RFC 7441]
0x44 Leaf A-D route for C-multicast mLDP [RFC 7441]
0x45-0x46 Reserved [RFC 7441]
0x47 Source Tree Join route for C-multicast mLDP [RFC 7441]
0x48-0x7f Unassigned (mLDP range)
0x80-0xff Reserved [RFC 7441]
BGP Prefix-SID TLV Types
Registration Procedure(s)
Expert Review
Expert(s)
Acee Lindem, Hannes Gredler
Reference
[RFC 8669]
Available Formats
[IMG]
CSV
Value Type Reference
0 Reserved [RFC 8669]
1 Label-Index [RFC 8669]
2 Deprecated [RFC 8669]
3 Originator SRGB [RFC 8669]
4 Deprecated [RFC 9252]
5 SRv6 L3 Service TLV [RFC 9252]
6 SRv6 L2 Service TLV [RFC 9252]
7-254 Unassigned
255 Reserved [RFC 8669]
BGP Prefix-SID Label-Index TLV Flags
Registration Procedure(s)
Expert Review
Expert(s)
Acee Lindem, Hannes Gredler
Reference
[RFC 8669]
Available Formats
[IMG]
CSV
Value Name Reference
0x0001-0x8000 Unassigned
BGP Prefix-SID Originator SRGB TLV Flags
Registration Procedure(s)
Expert Review
Expert(s)
Acee Lindem, Hannes Gredler
Reference
[RFC 8669]
Available Formats
[IMG]
CSV
Value Name Reference
0x0001-0x8000 Unassigned
BGP Graceful Restart Flags
Registration Procedure(s)
Standards Action
Reference
[RFC 4724][RFC 8538]
Available Formats
[IMG]
CSV
Bit Position Name Short Name Reference
0 Restart State R [RFC 4724]
1 Notification N [RFC 8538]
2-3 Unassigned
BGP Graceful Restart Flags for Address Family
Registration Procedure(s)
Standards Action
Reference
[RFC 4724][RFC 8538]
Available Formats
[IMG]
CSV
Bit Position Name Short Name Reference
0 Forwarding State F [RFC 4724]
1-7 Unassigned
SFP Attribute TLVs
Registration Procedure(s)
First Come First Served
Reference
[RFC 9015]
Available Formats
[IMG]
CSV
Type Name Reference Registration Date
0 Reserved [RFC 9015]
1 Association TLV [RFC 9015] 2020-09-02
2 Hop TLV [RFC 9015] 2020-09-02
3 SFT TLV [RFC 9015] 2020-09-02
4 MPLS Swapping/Stacking [RFC 9015] 2020-09-02
5 SFP Traversal With MPLS [RFC 9015] 2020-09-02
6-65534 Unassigned
65535 Reserved [RFC 9015]
SFP Association Type
Registration Procedure(s)
First Come First Served
Reference
[RFC 9015]
Available Formats
[IMG]
CSV
Association Type Name Reference Registration Date
0 Reserved [RFC 9015]
1 Bidirectional SFP [RFC 9015] 2020-09-02
2-65534 Unassigned
65535 Reserved [RFC 9015]
SFC SPI/SI Representation Flags
Registration Procedure(s)
Standards Action
Reference
[RFC 9015]
Available Formats
[IMG]
CSV
Value Name Reference
0 NSH data plane [RFC 9015]
1 MPLS data plane [RFC 9015]
2-15 Unassigned
BFD Mode
Reference
[RFC 9026]
Available Formats
[IMG]
CSV
Range Registration Procedures
0-175 IETF Review
176-249 First Come First Served
250-254 Experimental Use
255 IETF Review
Value Description Reference
0 Reserved [RFC 9026]
1 P2MP BFD Session [RFC 9026]
2-175 Unassigned
176 S-BFD for SRv6 Locator Session [draft-wang-bess-sbfd-discriminator-04]
177 S-BFD for Common Session [draft-wang-bess-sbfd-discriminator-04]
178-249 Unassigned
250-254 Experimental Use [RFC 9026]
255 Reserved [RFC 9026]
BFD Discriminator Optional TLV Type
Reference
[RFC 9026]
Available Formats
[IMG]
CSV
Range Registration Procedures
0-175 IETF Review
176-249 First Come First Served
250-254 Experimental Use
255 IETF Review
Value Description Reference
0 Reserved [RFC 9026]
1 Source IP Address [RFC 9026]
2-175 Unassigned
176-249 Unassigned
250-254 Experimental Use [RFC 9026]
255 Reserved [RFC 9026]
SRv6 Service Sub-TLV Types
Reference
[RFC 9252]
Available Formats
[IMG]
CSV
Range Registration Procedures
0-127 IETF Review
128-254 First Come First Served
255 IETF Review
Value Type Reference
0 Reserved [RFC 9252]
1 SRv6 SID Information Sub-TLV [RFC 9252]
2-254 Unassigned
255 Reserved [RFC 9252]
SRv6 Service Data Sub-Sub-TLV Types
Reference
[RFC 9252]
Available Formats
[IMG]
CSV
Range Registration Procedures
0-127 IETF Review
128-254 First Come First Served
255 IETF Review
Value Type Reference
0 Reserved [RFC 9252]
1 SRv6 SID Structure Sub-Sub-TLV [RFC 9252]
2-254 Unassigned
255 Reserved [RFC 9252]
BGP SRv6 Service SID Flags
Registration Procedure(s)
IETF Review
Reference
[RFC 9252]
Available Formats
[IMG]
CSV
Bit Position Name Reference
0-7 Unassigned
Long-lived Graceful Restart Flags for Address Family
Registration Procedure(s)
Standards Action
Reference
[RFC-ietf-idr-long-lived-gr-06]
Available Formats
[IMG]
CSV
Bit Position Name Short Name Reference
0 Preservation of state F [RFC-ietf-idr-long-lived-gr-06]
1-7 Unassigned
Contact Information
ID Name Contact URI Last Updated
[Eric_Rosen] Eric Rosen mailto:erosen&cisco.com 2010-02-23
[Gargi_Nalawade] Gargi Nalawade mailto:gargi&cisco.com 2004-02
Licensing Terms
|