Ethernet VPN

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Ethernet VPN (EVPN) is a technology for carrying layer 2 Ethernet traffic as a virtual private network using wide area network protocols. EVPN technologies include Ethernet over Multiprotocol Label Switching (MPLS) and Ethernet over Virtual Extensible LAN (VXLAN). [1] [2]

Contents

EVPN uses encapsulation methods to enhance the efficiency and scalability of Ethernet traffic over MPLS or IP-based networks. The Ethernet frames are encapsulated within MPLS or VXLAN headers for transport.

MPLS encapsulation

In MPLS-based EVPN, Ethernet frames are encapsulated with:

  1. MPLS label stack: Each EVPN instance is associated with a unique label that helps in identifying the destination bridge domain.
  2. Control word (optional): Provides additional information for synchronization and alignment in certain scenarios.

The encapsulated packet flow includes:

EVPNs are covered by a number of Internet RFCs, including:

See also

References

  1. ↑ "EVPN Overview - TechLibrary - Juniper Networks". www.juniper.net. Archived from the original on May 11, 2017. Retrieved 2019-12-19.
  2. ↑ "Understanding EVPN with VXLAN Data Plane Encapsulation - TechLibrary - Juniper Networks". www.juniper.net. Archived from the original on May 13, 2017. Retrieved 2019-12-19.
  3. ↑ A. Sajassi; R. Aggarwal; J. Uttaro; N. Bitar; W. Henderickx (May 2014). Requirements for Ethernet VPN (EVPN). Internet Engineering Task Force. doi: 10.17487/RFC7209 . ISSN   2070-1721. RFC 7209.Informational.
  4. ↑ R. Aggarwal; N. Bitar; A. Isaac; J. Uttaro; J. Drake; W. Henderickx (February 2015). A. Sajassi (ed.). BGP MPLS-Based Ethernet VPN. Internet Engineering Task Force. doi: 10.17487/RFC7432 . ISSN   2070-1721. RFC 7432.Proposed Standard. Updated by RFC  9572, 9573, 8584, 9161 and 9746.
  5. ↑ S. Salam; J. Drake; J. Uttaro; S. Boutros; J. Rabadan (January 2018). A. Sajassi (ed.). Ethernet-Tree (E-Tree) Support in Ethernet VPN (EVPN) and Provider Backbone Bridging EVPN (PBB-EVPN). Internet Engineering Task Force. doi: 10.17487/RFC8317 . ISSN   2070-1721. RFC 8317.Proposed Standard. Updates RFC  7385.
  6. ↑ N. Bitar; R. Shekhar; J. Uttaro; W. Henderickx (March 2018). A. Sajassi; J. Drake (eds.). A Network Virtualization Overlay Solution Using Ethernet VPN (EVPN). Internet Engineering Task Force. doi: 10.17487/RFC8365 . ISSN   2070-1721. RFC 8365.Proposed Standard. Updated by RFC  9746.
  7. ↑ S. Sathappan; K. Nagaraj; G. Hankins (January 2022). J. Rabadan (ed.). Operational Aspects of Proxy ARP/ND in Ethernet Virtual Private Networks. Internet Engineering Task Force. doi: 10.17487/RFC9161 . RFC 9161.Proposed Standard. Updates RFC  7432.
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