BGP Protocol
Address Families
| Family | Config Name | AFI/SAFI | Encode | Decode | Route Config |
|---|---|---|---|---|---|
| IPv4 Unicast | ipv4/unicast |
1/1 | ✓ | ✓ | ✓ |
| IPv6 Unicast | ipv6/unicast |
2/1 | ✓ | ✓ | ✓ |
| IPv4 Multicast | ipv4/multicast |
1/2 | ✓ | ✓ | ✓ |
| IPv6 Multicast | ipv6/multicast |
2/2 | ✓ | ✓ | ✓ |
| IPv4 VPN | ipv4/mpls-vpn |
1/128 | ✓ | ✓ | ✓ |
| IPv6 VPN | ipv6/mpls-vpn |
2/128 | ✓ | ✓ | ✓ |
| IPv4 FlowSpec | ipv4/flow |
1/133 | ✓ | ✓ | ✓ |
| IPv6 FlowSpec | ipv6/flow |
2/133 | ✓ | ✓ | ✓ |
| IPv4 FlowSpec VPN | ipv4/flow-vpn |
1/134 | ✓ | ✓ | ✓ |
| IPv6 FlowSpec VPN | ipv6/flow-vpn |
2/134 | ✓ | ✓ | ✓ |
| IPv4 MPLS Label | ipv4/mpls-label |
1/4 | ✓ | ✓ | ✓ |
| IPv6 MPLS Label | ipv6/mpls-label |
2/4 | ✓ | ✓ | ✓ |
| L2VPN EVPN | l2vpn/evpn |
25/70 | ✓ | ✓ | ✓ |
| L2VPN VPLS | l2vpn/vpls |
25/65 | ✓ | ✓ | ✓ |
| BGP-LS | bgp-ls/bgp-ls |
16388/71 | ✕ | ✓ | ✕ |
| BGP-LS VPN | bgp-ls/bgp-ls-vpn |
16388/72 | ✕ | ✓ | ✕ |
| IPv4 MVPN | ipv4/mvpn |
1/5 | ✕ | ✓ | ✕ |
| IPv6 MVPN | ipv6/mvpn |
2/5 | ✕ | ✓ | ✕ |
| IPv4 RTC | ipv4/rtc |
1/132 | ✕ | ✓ | ✕ |
| IPv4 MUP | ipv4/mup |
1/85 | ✓ | ✓ | ✓ |
| IPv6 MUP | ipv6/mup |
2/85 | ✓ | ✓ | ✓ |
| IPv4 SR-Policy | ipv4/sr-policy |
1/73 | ✓ | ✓ | ✓ |
| IPv6 SR-Policy | ipv6/sr-policy |
2/73 | ✓ | ✓ | ✓ |
Capabilities
| Capability | Code | RFC | Description |
|---|---|---|---|
| Multiprotocol Extensions | 1 | RFC 4760 | Multi-protocol BGP (AFI/SAFI negotiation) |
| 4-byte ASN | 65 | RFC 6793 | 32-bit AS numbers |
| Route Refresh | 2 | RFC 2918 | Request full route re-advertisement |
| Enhanced Route Refresh | 70 | RFC 7313 | Bounded clear and re-send |
| ADD-PATH | 69 | RFC 7911 | Multiple paths per prefix |
| Extended Message | 6 | RFC 8654 | 65535-byte messages |
| Extended Next Hop | 5 | RFC 8950 | IPv6 next-hop for IPv4 NLRI |
| Graceful Restart | 64 | RFC 4724 | Session preservation across restarts (Restarting Speaker: R-bit via zefs marker on ze signal restart) |
| Long-Lived GR | 71 | RFC 9494 | Extended stale route retention with LLGR_STALE community and depreference |
| BGP Role | 9 | RFC 9234 | Peer relationship role |
| Hostname | 73 | draft | FQDN capability |
| Software Version | 75 | draft | Software version advertisement |
| Link-Local Next Hop | 77 | — | IPv6 link-local as next-hop |
| PATHS-LIMIT | 76 | draft-abraitis-idr-addpath-paths-limit | Per-family path count limit for ADD-PATH |
Path Attributes
| Attribute | Code | JSON Key | Description |
|---|---|---|---|
| ORIGIN | 1 | origin |
igp / egp / incomplete |
| AS_PATH | 2 | as-path |
AS path segments |
| NEXT_HOP | 3 | next-hop |
Next hop IP address |
| MED | 4 | med |
Multi-Exit Discriminator |
| LOCAL_PREF | 5 | local-preference |
Local preference |
| ATOMIC_AGGREGATE | 6 | atomic-aggregate |
Atomic aggregate flag |
| AGGREGATOR | 7 | aggregator |
Aggregator ASN:IP |
| COMMUNITY | 8 | community |
Standard communities |
| ORIGINATOR_ID | 9 | originator-id |
Route reflector originator |
| CLUSTER_LIST | 10 | cluster-list |
Route reflector cluster list |
| MP_REACH_NLRI | 14 | — | Multiprotocol reachable NLRI |
| MP_UNREACH_NLRI | 15 | — | Multiprotocol unreachable NLRI |
| EXTENDED_COMMUNITY | 16 | extended-community |
Extended communities |
| LARGE_COMMUNITY | 32 | large-community |
Large communities (RFC 8092) |
| PREFIX_SID | 40 | prefix-sid |
Segment Routing prefix SID |