Ethernet VPN
(Redirected from EVPN)
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 MPLS and Ethernet over VXLAN.[1][2]
EVPN uses encapsulation methods to ensure efficient and scalable transmission of Ethernet traffic over MPLS or IP-based networks. The Ethernet frames are encapsulated within MPLS or VXLAN headers for transport.
MPLS encapsulation
[edit]In MPLS-based EVPN, Ethernet frames are encapsulated with:
- MPLS label stack: Each EVPN instance is associated with a unique label that helps in identifying the destination bridge domain.
- Control word (optional): Provides additional information for synchronization and alignment in certain scenarios.
The encapsulated packet flow includes:
- Original Ethernet frame
- MPLS labels
- Outer IP header (in case of IP/MPLS networks)
EVPNs are covered by a number of Internet RFCs, including:
- RFC 7209 –
Requirements for Ethernet VPN (EVPN),
[3] Informational. - RFC 7432 –
BGP MPLS-Based Ethernet VPN,
[4] Proposed Standard. - RFC 8317 –
Ethernet-Tree (E-Tree) Support in Ethernet VPN (EVPN) and Provider Backbone Bridging EVPN (PBB-EVPN),
[5] Proposed Standard. - RFC 8365 –
A Network Virtualization Overlay Solution Using Ethernet VPN (EVPN),
[6] Proposed Standard. - RFC 9161 –
Operational Aspects of Proxy ARP/ND in Ethernet Virtual Private Networks,
[7] Proposed Standard.
References
[edit]- ^ "EVPN Overview - TechLibrary - Juniper Networks". www.juniper.net. Archived from the original on May 11, 2017. Retrieved 2019-12-19.
- ^ "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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
See also
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