Border Gateway Protocol (BGP) Parameters

Last Updated: 2024-12-10
Available Formats: XML
HTML
Plain text

Registries included below

BGP Message Types

Registration Procedure(s)

Standards Action

Reference

[RFC4271]

Available Formats

CSV

Value	Name	Reference
0	Reserved
1	OPEN	[RFC4271]
2	UPDATE	[RFC4271]
3	NOTIFICATION	[RFC4271]
4	KEEPALIVE	[RFC4271]
5	ROUTE-REFRESH	[RFC2918]
6-255	Unassigned

BGP Path Attributes

Registration Procedure(s)

Standards Action

Reference

[RFC4271]

Available Formats

CSV

Value	Code	Reference
0	Reserved
1	ORIGIN	[RFC4271]
2	AS_PATH	[RFC4271]
3	NEXT_HOP	[RFC4271]
4	MULTI_EXIT_DISC	[RFC4271]
5	LOCAL_PREF	[RFC4271]
6	ATOMIC_AGGREGATE	[RFC4271]
7	AGGREGATOR	[RFC4271]
8	COMMUNITIES	[RFC1997]
9	ORIGINATOR_ID	[RFC4456]
10	CLUSTER_LIST	[RFC4456]
11	DPA (deprecated)	[Chen, E., Bates, T., "Destination Preference Attribute for BGP", Work in progress, March 1996.][RFC6938]
12	ADVERTISER (historic) (deprecated)	[RFC1863][RFC4223][RFC6938]
13	RCID_PATH / CLUSTER_ID (Historic) (deprecated)	[RFC1863][RFC4223][RFC6938]
14	MP_REACH_NLRI	[RFC4760]
15	MP_UNREACH_NLRI	[RFC4760]
16	EXTENDED COMMUNITIES	[Eric_Rosen][draft-ramachandra-bgp-ext-communities-00][RFC4360]
17	AS4_PATH	[RFC6793]
18	AS4_AGGREGATOR	[RFC6793]
19	SAFI Specific Attribute (SSA) (deprecated)	[Gargi_Nalawade][draft-kapoor-nalawade-idr-bgp-ssa-00][draft-nalawade-idr-mdt-safi-00][draft-wijnands-mt-discovery-00]
20	Connector Attribute (deprecated)	[RFC6037]
21	AS_PATHLIMIT (deprecated)	[draft-ietf-idr-as-pathlimit]
22	PMSI_TUNNEL	[RFC6514]
23	Tunnel Encapsulation	[RFC9012]
24	Traffic Engineering	[RFC5543]
25	IPv6 Address Specific Extended Community	[RFC5701]
26	AIGP	[RFC7311]
27	PE Distinguisher Labels	[RFC6514]
28	BGP Entropy Label Capability Attribute (deprecated)	[RFC6790][RFC7447]
29	BGP-LS Attribute	[RFC9552]
30	Deprecated	[RFC8093]
31	Deprecated	[RFC8093]
32	LARGE_COMMUNITY	[RFC8092]
33	BGPsec_Path	[RFC8205]
34	BGP Community Container Attribute (TEMPORARY - registered 2017-07-28, extension registered 2024-08-22, expires 2025-07-28)	[draft-ietf-idr-wide-bgp-communities-11]
35	Only to Customer (OTC)	[RFC9234]
36	BGP Domain Path (D-PATH) (TEMPORARY - registered 2019-07-08, extension registered 2024-05-30, expires 2025-07-08)	[draft-ietf-bess-evpn-ipvpn-interworking-10]
37	SFP attribute	[RFC9015]
38	BFD Discriminator	[RFC9026]
39	BGP Next Hop Dependent Capabilities (NHC) (TEMPORARY - registered 2022-12-20, extension registered 2024-12-10, expires 2025-12-20)	[draft-ietf-idr-entropy-label-13]
40	BGP Prefix-SID	[RFC8669]
41-127	Unassigned
128	ATTR_SET	[RFC6368]
129	Deprecated	[RFC8093]
130-240	Unassigned
241	Deprecated	[RFC8093]
242	Deprecated	[RFC8093]
243	Deprecated	[RFC8093]
244-254	Unassigned
255	Reserved for development	[RFC2042]

BGP Error (Notification) Codes

Registration Procedure(s)

Standards Action

Reference

[RFC4271][RFC7313]

Available Formats

CSV

Value	Name	Reference
0	Reserved
1	Message Header Error	[RFC4271]
2	OPEN Message Error	[RFC4271]
3	UPDATE Message Error	[RFC4271]
4	Hold Timer Expired	[RFC4271]
5	Finite State Machine Error	[RFC4271]
6	Cease	[RFC4271]
7	ROUTE-REFRESH Message Error	[RFC7313]
8	Send Hold Timer Expired	[RFC9687]
9-255	Unassigned

BGP Error Subcodes

Registration Procedure(s)

Standards Action

Reference

[RFC4271]

Message Header Error subcodes

Registration Procedure(s)

Standards Action

Reference

[RFC4271]

Available Formats

CSV

Value	Name	Reference
0	Unspecific	[RFC Errata 4493]
1	Connection Not Synchronized	[RFC4271]
2	Bad Message Length	[RFC4271]
3	Bad Message Type	[RFC4271]
4-255	Unassigned

OPEN Message Error subcodes

Registration Procedure(s)

Standards Action

Reference

[RFC4271]

Available Formats

CSV

Value	Name	Reference
0	Unspecific	[RFC Errata 4493]
1	Unsupported Version Number	[RFC4271]
2	Bad Peer AS	[RFC4271]
3	Bad BGP Identifier	[RFC4271]
4	Unsupported Optional Parameter	[RFC4271]
5	[Deprecated]	[RFC4271]
6	Unacceptable Hold Time	[RFC4271]
7	Unsupported Capability	[RFC5492]
8	Deprecated	[RFC9234]
9	Deprecated	[RFC9234]
10	Deprecated	[RFC9234]
11	Role Mismatch	[RFC9234]
12-255	Unassigned

UPDATE Message Error subcodes

Registration Procedure(s)

Standards Action

Reference

[RFC4271]

Available Formats

CSV

Value	Name	Reference
0	Unspecific	[RFC Errata 4493]
1	Malformed Attribute List	[RFC4271]
2	Unrecognized Well-known Attribute	[RFC4271]
3	Missing Well-known Attribute	[RFC4271]
4	Attribute Flags Error	[RFC4271]
5	Attribute Length Error	[RFC4271]
6	Invalid ORIGIN Attribute	[RFC4271]
7	[Deprecated]	[RFC4271]
8	Invalid NEXT_HOP Attribute	[RFC4271]
9	Optional Attribute Error	[RFC4271]
10	Invalid Network Field	[RFC4271]
11	Malformed AS_PATH	[RFC4271]
12-255	Unassigned

BGP Finite State Machine Error Subcodes

Registration Procedure(s)

Standards Action

Reference

[RFC6608]

Available Formats

CSV

Value	Name	Reference
0	Unspecified Error	[RFC6608]
1	Receive Unexpected Message in OpenSent State	[RFC6608]
2	Receive Unexpected Message in OpenConfirm State	[RFC6608]
3	Receive Unexpected Message in Established State	[RFC6608]
4-255	Unassigned

BGP Cease NOTIFICATION message subcodes

Registration Procedure(s)

Standards Action or Early IANA Allocation process

Reference

[RFC4486]

Available Formats

CSV

Value	Name	Reference
0	Reserved
1	Maximum Number of Prefixes Reached	[RFC4486]
2	Administrative Shutdown	[RFC4486][RFC9003]
3	Peer De-configured	[RFC4486]
4	Administrative Reset	[RFC4486][RFC9003]
5	Connection Rejected	[RFC4486]
6	Other Configuration Change	[RFC4486]
7	Connection Collision Resolution	[RFC4486]
8	Out of Resources	[RFC4486]
9	Hard Reset	[RFC8538]
10	BFD Down	[RFC9384]
11-255	Unassigned

BGP ROUTE-REFRESH Message Error subcodes

Reference: [RFC7313]
Available Formats: CSV

Range	Registration Procedures
0-127	Standards Action
128-255	First Come First Served

Value	Name	Reference
0	Reserved	[RFC7313]
1	Invalid Message Length	[RFC7313]
2-255	Unassigned

BGP Outbound Route Filtering (ORF) Types

Reference: [RFC5291]
Available Formats: 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	[RFC5291]
1-63	Unassigned
64	Address Prefix ORF	[RFC5292]
65	CP-ORF	[RFC7543]
66	VPN Prefix ORF	[draft-ietf-idr-vpn-prefix-orf-06]
67-127	Unassigned
128-255	Reserved for Vendor-Specific	[RFC5291]

BGP OPEN Optional Parameter Types

Registration Procedure(s)

IETF Review

Reference

[RFC5492]

Available Formats

CSV

Value	Name	Reference
0	Reserved	[RFC5492]
1	Authentication (deprecated)	[RFC4271][RFC5492]
2	Capabilities	[RFC5492]
3-254	Unassigned
255	Extended Length	[RFC9072]

BGP Tunnel Encapsulation Attribute Tunnel Types

Reference

[RFC9012]

Note

Moved to [https://www.iana.org/assignments/bgp-tunnel-encapsulation] per [RFC9012].

BGP Tunnel Encapsulation Attribute Sub-TLVs

Reference

[RFC9012]

Note

Moved to [https://www.iana.org/assignments/bgp-tunnel-encapsulation] per [RFC9012].

BGP Layer 2 Encapsulation Types

Reference

[RFC6624]

Note

When this registry is modified, the YANG module [iana-bgp-l2-encaps] must be updated 
as defined in [RFC9291].

Available Formats

CSV

Range	Registration Procedures
0-127	Expert Review
128-251	First Come First Served
252-255	Experimental Use

Value	Description	Reference
0	Reserved	[RFC6624]
1	Frame Relay	[RFC4446]
2	ATM AAL5 SDU VCC transport	[RFC4446]
3	ATM transparent cell transport	[RFC4816]
4	Ethernet (VLAN) Tagged Mode	[RFC4448]
5	Ethernet Raw Mode	[RFC4448]
6	Cisco HDLC	[RFC4618]
7	PPP	[RFC4618]
8	SONET/SDH Circuit Emulation Service	[RFC4842]
9	ATM n-to-one VCC cell transport	[RFC4717]
10	ATM n-to-one VPC cell transport	[RFC4717]
11	IP Layer 2 Transport	[RFC3032]
12-14	Unassigned
15	Frame Relay Port mode	[RFC4619]
16	Unassigned
17	Structure-agnostic E1 over packet	[RFC4553]
18	Structure-agnostic T1 (DS1) over packet	[RFC4553]
19	VPLS	[RFC4761]
20	Structure-agnostic T3 (DS3) over packet	[RFC4553]
21	Nx64kbit/s Basic Service using Structure-aware	[RFC5086]
22-24	Unassigned
25	Frame Relay DLCI	[RFC4619]
25-39	Unassigned
40	Structure-agnostic E3 over packet	[RFC4553]
41	Octet-aligned payload for Structure-agnostic DS1 circuits	[RFC4553]
42	E1 Nx64kbit/s with CAS using Structure-aware	[RFC5086]
43	DS1 (ESF) Nx64kbit/s with CAS using Structure-aware	[RFC5086]
44	DS1 (SF) Nx64kbit/s with CAS using Structure-aware	[RFC5086]
45-127	Unassigned
128-251	Unassigned
252-255	Experimental Use	[RFC6624]

BGP Layer 2 TLV Types

Reference: [RFC6624]
Available Formats: CSV

Range	Registration Procedures
0-127	Expert Review
128-251	First Come First Served
252-255	Experimental Use

Value	Description	Reference
0	Reserved	[RFC6624]
1	Circuit Status Vector	[RFC6624]
2-127	Unassigned
128-251	Unassigned
252-255	Experimental Use	[RFC6624]

BGP AIGP Attribute Types

Registration Procedure(s)

Standards Action

Reference

[RFC7311]

Available Formats

CSV

Value	Description	Reference
0	Reserved	[RFC7311]
1	AIGP	[RFC7311]
2-255	Unassigned

BGP Route Refresh Subcodes

Reference: [RFC7313]
Available Formats: CSV

Range	Registration Procedures
0-127	Standards Action
128-254	First Come First Served

Value	Code	Reference
0	Route-Refresh	[RFC2918][RFC5291]
1	BoRR	[RFC7313]
2	EoRR	[RFC7313]
3-254	Unassigned
255	Reserved	[RFC7313]

P-Multicast Service Interface Tunnel (PMSI Tunnel) Tunnel Types

Reference

[RFC7385][RFC8317]

Note

The status of value 0xFF may only be changed through Standards Action [RFC8126].

Available Formats

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	[RFC6514]
0x01	RSVP-TE P2MP LSP	[RFC6514]
0x02	mLDP P2MP LSP	[RFC6514]
0x03	PIM-SSM Tree	[RFC6514]
0x04	PIM-SM Tree	[RFC6514]
0x05	BIDIR-PIM Tree	[RFC6514]
0x06	Ingress Replication	[RFC6514]
0x07	mLDP MP2MP LSP	[RFC6514]
0x08	Transport Tunnel	[RFC7524]
0x09	Unassigned
0x0A	Assisted Replication Tunnel	[RFC9574]
0x0B	BIER	[RFC8556]
0x0C	SR-MPLS P2MP Tree (TEMPORARY - registered 2020-12-09, extension registered 2024-11-27, expires 2025-12-09)	[draft-ietf-bess-mvpn-evpn-sr-p2mp-08]
0x0D-0x7A	Unassigned
0x7B-0x7E	Reserved for Experimental Use	[RFC8317]
0x7F	Reserved	[RFC8317]
0x80-0xFA	Reserved for Composite Tunnel	[RFC8317]
0xFB-0xFE	Reserved for Experimental Use	[RFC7385]
0xFF	wildcard transport tunnel type	[RFC8338]

P-Multicast Service Interface (PMSI) Tunnel Attribute Flags

Registration Procedure(s)

Standards Action

Reference

[RFC7902]

Available Formats

CSV

Value	Name	Reference
0	Unassigned
1	Extension	[RFC7902]
2	Leaf Information Required per-Flow (LIR-pF)	[RFC8534]
3-4	Assisted Replication Type (T)	[RFC9574]
5	Broadcast and Multicast (BM)	[RFC9574]
6	Unknown (U)	[RFC9574]
7	Leaf Information Required (L)	[RFC6514]

BGP MCAST-VPN Route Types

Registration Procedure(s)

Standards Action

Reference

[RFC7441][RFC6514]

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

CSV

Value	Meaning	Reference
0x00	Reserved	[RFC7441][RFC6514]
0x01	Intra-AS I-PMSI A-D route	[RFC7441][RFC6514]
0x02	Inter-AS I-PMSI A-D route	[RFC7441][RFC6514]
0x03	S-PMSI A-D route	[RFC7441][RFC6514]
0x04	Leaf A-D route	[RFC7441][RFC6514]
0x05	Source Active A-D route	[RFC7441][RFC6514]
0x06	Shared Tree Join route	[RFC7441][RFC6514]
0x07	Source Tree Join route	[RFC7441][RFC6514]
0x08-0x3f	Unassigned (Generic/PIM range)
0x40-0x42	Reserved	[RFC7441]
0x43	S-PMSI A-D route for C-multicast mLDP	[RFC7441]
0x44	Leaf A-D route for C-multicast mLDP	[RFC7441]
0x45-0x46	Reserved	[RFC7441]
0x47	Source Tree Join route for C-multicast mLDP	[RFC7441]
0x48-0x7f	Unassigned (mLDP range)
0x80-0xff	Reserved	[RFC7441]

BGP Prefix-SID TLV Types

Registration Procedure(s)

Expert Review

Expert(s)

Acee Lindem, Hannes Gredler

Reference

[RFC8669]

Available Formats

CSV

Value	Type	Reference
0	Reserved	[RFC8669]
1	Label-Index	[RFC8669]
2	Deprecated	[RFC8669]
3	Originator SRGB	[RFC8669]
4	Deprecated	[RFC9252]
5	SRv6 L3 Service TLV	[RFC9252]
6	SRv6 L2 Service TLV	[RFC9252]
7-254	Unassigned
255	Reserved	[RFC8669]

BGP Prefix-SID Label-Index TLV Flags

Registration Procedure(s)

Expert Review

Expert(s)

Acee Lindem, Hannes Gredler

Reference

[RFC8669]

Available Formats

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

[RFC8669]

Available Formats

CSV

Value	Name	Reference
0x0001-0x8000	Unassigned

BGP Graceful Restart Flags

Registration Procedure(s)

Standards Action

Reference

[RFC4724][RFC8538]

Available Formats

CSV

Bit Position	Name	Short Name	Reference
0	Restart State	R	[RFC4724]
1	Notification	N	[RFC8538]
2-3	Unassigned

BGP Graceful Restart Flags for Address Family

Registration Procedure(s)

Standards Action

Reference

[RFC4724][RFC8538]

Available Formats

CSV

Bit Position	Name	Short Name	Reference
0	Forwarding State	F	[RFC4724]
1-7	Unassigned

SFP Attribute TLVs

Registration Procedure(s)

First Come First Served

Reference

[RFC9015]

Available Formats

CSV

Type	Name	Reference	Registration Date
0	Reserved	[RFC9015]
1	Association TLV	[RFC9015]	2020-09-02
2	Hop TLV	[RFC9015]	2020-09-02
3	SFT TLV	[RFC9015]	2020-09-02
4	MPLS Swapping/Stacking	[RFC9015]	2020-09-02
5	SFP Traversal With MPLS	[RFC9015]	2020-09-02
6-65534	Unassigned
65535	Reserved	[RFC9015]

SFP Association Type

Registration Procedure(s)

First Come First Served

Reference

[RFC9015]

Available Formats

CSV

Association Type	Name	Reference	Registration Date
0	Reserved	[RFC9015]
1	Bidirectional SFP	[RFC9015]	2020-09-02
2-65534	Unassigned
65535	Reserved	[RFC9015]

SFC SPI/SI Representation Flags

Registration Procedure(s)

Standards Action

Reference

[RFC9015]

Available Formats

CSV

Value	Name	Reference
0	NSH data plane	[RFC9015]
1	MPLS data plane	[RFC9015]
2-15	Unassigned

BFD Mode

Reference: [RFC9026]
Available Formats: 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	[RFC9026]
1	P2MP BFD Session	[RFC9026]
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	[RFC9026]
255	Reserved	[RFC9026]

BFD Discriminator Optional TLV Type

Reference: [RFC9026]
Available Formats: 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	[RFC9026]
1	Source IP Address	[RFC9026]
2-175	Unassigned
176-249	Unassigned
250-254	Experimental Use	[RFC9026]
255	Reserved	[RFC9026]

SRv6 Service Sub-TLV Types

Reference: [RFC9252]
Available Formats: CSV

Range	Registration Procedures
0-127	IETF Review
128-254	First Come First Served
255	IETF Review

Value	Type	Reference
0	Reserved	[RFC9252]
1	SRv6 SID Information Sub-TLV	[RFC9252]
2-254	Unassigned
255	Reserved	[RFC9252]

SRv6 Service Data Sub-Sub-TLV Types

Reference: [RFC9252]
Available Formats: CSV

Range	Registration Procedures
0-127	IETF Review
128-254	First Come First Served
255	IETF Review

Value	Type	Reference
0	Reserved	[RFC9252]
1	SRv6 SID Structure Sub-Sub-TLV	[RFC9252]
2-254	Unassigned
255	Reserved	[RFC9252]

BGP SRv6 Service SID Flags

Registration Procedure(s)

IETF Review

Reference

[RFC9252]

Available Formats

CSV

Bit Position	Name	Reference
0-7	Unassigned

Long-Lived Graceful Restart Flags for Address Family

Registration Procedure(s)

Standards Action

Reference

[RFC9494]

Available Formats

CSV

Bit Position	Name	Short Name	Reference
0	Preservation of state	F	[RFC9494]
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

Border Gateway Protocol (BGP) Parameters

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

Contact Information

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