BGP Extensions

The following BGP extensions are required as per draft-ietf-bess-srv6-services:

• SRv6 Service TLV:

  • SRv6 Service TLV encoded in the BGP Prefix-SID attribute

  • SRv6 SID Information Sub-TLV (SRv6 Service Sub-TLV type 1) encoded in the SRv6 Service TLV

  • SRv6 SID Structure Sub-Sub-TLV (SRv6 Service Data Sub-Sub-TLV type 1)

• Transposition of 20 bits of the FUNCTION to the Label field of the NLRI

The BGP extensions are applied to the following routes by setting the behavior field in the SRv6 Services TLV is set as per RFC 8986.

• VPN-IPv4

• VPN-IPv6

• IPv4

• IPv6

• EVPN AD per-EVI

• EVPN AD per-ES