- Written by Hyun Chul Chung
- Posted on June 10, 2020
- Updated on October 14, 2021
- 6120 Views
As of EOS 4.22.0F, EVPN all active multihoming is supported as a standardized redundancy solution. Redundancy
- Written by Pintu Kumar
- Posted on June 17, 2019
- Updated on June 19, 2019
- 8733 Views
This feature extends the BGP Layer 3 VPN Import/Export and VRF Route Leaking functionality to “default” VRF.
- Written by Alton Lo
- Posted on November 23, 2020
- Updated on November 23, 2020
- 6007 Views
To use IPv6 addresses for VXLAN underlay, there are two different approaches. The first approach is to make use of
- Written by Denis Evoy
- Posted on August 20, 2020
- Updated on August 20, 2020
- 9260 Views
In a Service Provider network, a Provider Edge (PE) device learns VPN paths from remote PEs and uses the Route Target
- Written by Madhu Sudan
- Posted on April 26, 2021
- Updated on April 26, 2021
- 5761 Views
This feature allows a Data Center (DC) operator to incrementally migrate their VXLAN network from IPv4 to IPv6
- Written by Amit Ranpise
- Posted on November 11, 2019
- Updated on June 6, 2022
- 8992 Views
As described in the Multi VTEP MLAG TOI, singly connected hosts can lead to suboptimal peer link utilisation. By
- Written by Alton Lo
- Posted on November 6, 2023
- Updated on November 20, 2023
- 1298 Views
RFC7432 defines the MAC/IP advertisement NLRI (route type 2) for exchanging EVPN overlay end-hosts MAC addresses reachability information. When an EVPN MAC/IP route contains more than one path to the same L2 destination, the EVPN MAC/IP best-path selection algorithm determines which of these paths should be considered as the best path to that L2 destination.
- Written by Alton Lo
- Posted on March 18, 2020
- Updated on March 18, 2020
- 13292 Views
In the Centralized Anycast Gateway configuration, the Spines are configured with EVPN IRB and are used as the IP
- Written by Kallol Mandal
- Posted on June 21, 2021
- Updated on October 30, 2023
- 12172 Views
In the Centralized Anycast Gateway configuration, the Spines are configured with EVPN IRB and are used as the IP
- Written by Arup Raton Roy
- Posted on August 24, 2020
- Updated on December 27, 2021
- 5887 Views
This feature enables support for Macro Segmentation Service (MSS) to insert security devices into the traffic path
- Written by Mason Rumuly
- Posted on March 3, 2023
- Updated on March 6, 2023
- 4433 Views
Multihoming in EVPN allows a single customer edge (CE) to connect to multiple provider edges (PE or tunnel endpoint). In any multihoming EVPN instance (EVI), for each ethernet segment a designated forwarder is elected using EVPN type 4 Ethernet Segment (ES) routes sent through BGP. In single-active mode, the designated forwarder (DF) is responsible for sending and receiving all traffic. In all-active mode, the DF is only used to determine whether broadcast, unknown
- Written by Aaron Bamberger
- Posted on April 23, 2020
- Updated on February 13, 2024
- 6500 Views
E-Tree is an L2 EVPN service (defined in RFC8317) in which each attachment circuit (AC) is assigned the role of Root or Leaf. Once roles are assigned, the following forwarding rules are enforced:
- Written by Lavanya Conjeevaram
- Posted on March 31, 2017
- Updated on November 29, 2023
- 9242 Views
Ethernet VPN (EVPN) is an extension of the BGP protocol introducing a new address family: L2VPN (address family
- Written by Alton Lo
- Posted on September 26, 2023
- Updated on September 26, 2023
- 1897 Views
EVPN route advertisements carry RD and RT. RD (Route Distinguisher) : prepend to the tenant’s IP Prefix or MAC address to make it globally unique. RT (Route Target) : a BGP extended community used to tag the EVPN route. The EVPN import policy is chosen to select what is the target tenant VRF is imported from the global EVPN table.
- Written by Jeffrey Nelson
- Posted on March 5, 2020
- Updated on July 31, 2023
- 7894 Views
This feature adds control plane support for inter subnet forwarding between EVPN and IPVPN networks. It also
- Written by Jeff Wen
- Posted on January 21, 2019
- Updated on November 30, 2023
- 6776 Views
In the traditional data center design, inter-subnet forwarding is provided by a centralized router, where traffic traverses across the network to a centralized routing node and back again to its final destination. In a large multi-tenant data center environment this operational model can lead to inefficient use of bandwidth and sub-optimal forwarding.
- Written by Jeffrey Nelson
- Posted on October 28, 2020
- Updated on August 11, 2023
- 15002 Views
This feature adds control plane support for inter subnet forwarding between EVPN networks. This support is achieved
- Written by May Young
- Posted on June 24, 2021
- Updated on June 24, 2021
- 7188 Views
This feature is available when configuring Layer2 EVPN or EVPN IRB. As described in RFC7432 section 15
- Written by Alton Lo
- Posted on January 23, 2019
- Updated on January 23, 2019
- 10595 Views
“MLAG Domain Shared Router MAC” is a new mechanism to introduce a new router MAC to be used for MLAG TOR
- Written by Wade Carpenter
- Posted on April 24, 2020
- Updated on December 6, 2023
- 11456 Views
EVPN MPLS VPWS (RFC 8214) provides the ability to forward customer traffic to / from a given attachment circuit (AC) without any MAC lookup / learning. The basic advantage of VPWS over an L2 EVPN is the reduced control plane signalling due to not exchanging MAC address information. In contrast to LDP pseudowires, EVPN MPLS VPWS uses BGP for signalling. Port based and VLAN based services are supported.
- Written by Ayush
- Posted on January 31, 2024
- Updated on January 31, 2024
- 686 Views
In network deployments, where border leaf or Superspine act as PEG and it is in the transit path to other multicast VTEPs, the multicast stream will not pass since the border leaf will decapsulate the packet even if it doesn't have a receiver. This transit node is called the Bud Node. The device should be able to send decapsulated packets to any local receivers as well as send the encapsulated packets to other VTEPs.
- Written by Alton Lo
- Posted on June 29, 2023
- Updated on June 30, 2023
- 2974 Views
EVPN Multihoming defines a mechanism for Multihoming PEs to quickly signal, to remote PEs, a failure in an Ethernet Segment (ES) connectivity with the use of Ethernet A-D per ES route
- Written by Chris Hydon
- Posted on April 20, 2021
- Updated on October 25, 2023
- 7545 Views
Multihoming in EVPN allows a single customer edge (CE) to connect to multiple provider edges (PE or tunnel endpoint).
- Written by Chris Hydon
- Posted on October 20, 2022
- Updated on April 13, 2023
- 4489 Views
In EVPN, an overlay index is a field in type-5 IP Prefix routes that indicates that they should resolve indirectly rather than using resolution information contained in the type-5 route itself. Depending on the type of overlay index, this resolution information may come from type-1 auto discovery or type-2 MAC+IP routes. For this feature the gateway IP address field of the type-5 NLRI is used as the overlay index, which matches the target IPv4 / IPv6 address in the type-2 NLRI.
- Written by Alton Lo
- Posted on April 27, 2020
- Updated on July 14, 2023
- 5779 Views
As described in the L3 EVPN VXLAN Configuration Guide, it is common practice to use Layer 3 EVPN to provide multi
- Written by Christoph Schwarz
- Posted on August 23, 2022
- Updated on October 21, 2022
- 5597 Views
Flexible cross-connect service is an extension of EVPN MPLS Virtual Private Wire Service (VPWS) (RFC 8214). It allows for multiplexing multiple attachment circuits across different Ethernet Segments and physical interfaces into a single EVPN VPWS service tunnel while still providing single-active and all-active multi-homing.
- Written by Xuan Qi
- Posted on March 13, 2020
- Updated on March 13, 2020
- 8255 Views
In EOS 4.22.0F, EVPN VXLAN all active multi homing L2 support is available. A customer edge (CE) device can connect to
- Written by Chris Hydon
- Posted on June 17, 2019
- Updated on January 25, 2024
- 17212 Views
Ethernet VPN (EVPN) networks normally require some measure of redundancy to reduce or eliminate the impact of outages and maintenance. RFC7432 describes four types of route to be exchanged through EVPN, with a built-in multihoming mechanism for redundancy. Prior to EOS 4.22.0F, MLAG was available as a redundancy option for EVPN with VXLAN, but not multihoming. EVPN multihoming is a multi-vendor standards-based redundancy solution that does not require a dedicated peer link and allows for more flexible configurations than MLAG, supporting peering on a per interface level rather than a per device level. It also supports a mass withdrawal mechanism to minimize traffic loss when a link goes down.
- Written by Xuan Qi
- Posted on October 20, 2022
- Updated on December 6, 2023
- 1519 Views
EVPN gateway support for all-active (A-A) multihoming adds a new redundancy model to our multi-domain EVPN solution introduced in [1]. This deployment model introduces the concept of a WAN Interconnect Ethernet Segment identifier (WAN I-ESI) which is shared by gateway nodes within the same domain (site) and set in MAC-IP routes that cross domain boundaries. The WAN I-ESI allows the gateway’s EVPN neighbors to form L2 and L3 overlay ECMP on routes re-exported by the gateway.
- Written by Mitchell Jameson
- Posted on February 5, 2020
- Updated on February 5, 2020
- 5059 Views
This feature enables support for an EVPN VxLAN control plane in conjunction with Arista’s OpenStack ML2 plugin for
- Written by Aadil
- Posted on December 20, 2019
- Updated on December 20, 2019
- 7918 Views
Starting with EOS release 4.22.0F, the EVPN VXLAN L3 Gateway using EVPN IRB supports routing traffic from one IPV6
- Written by Alton Lo
- Posted on June 14, 2019
- Updated on October 7, 2019
- 6450 Views
Starting with EOS release 4.22.0F, the EVPN VXLAN L3 Gateway using EVPN IRB supports routing traffic from IPV6 host to
- Written by Kallol Mandal
- Posted on November 14, 2019
- Updated on December 22, 2020
- 8419 Views
Starting with EOS release 4.22.0F, the EVPN VXLAN L3 Gateway using EVPN IRB supports routing traffic from one IPV6
- Written by Aaron Bamberger
- Posted on October 28, 2020
- Updated on October 28, 2020
- 6220 Views
In a traditional EVPN VXLAN centralized anycast gateway deployment, multiple L3 VTEPs serve the role of the
- Written by Mitchell Jameson
- Posted on August 24, 2020
- Updated on October 6, 2023
- 5469 Views
Typical Wi Fi networks utilize a single, central Wireless LAN Controller (WLC) to act as a gateway between the
- Written by Shamit Kapadia
- Posted on February 23, 2021
- Updated on February 5, 2022
- 4302 Views
In EVPN deployment with VXLAN underlay when an EVPN type 5 prefix is imported into an IP VRF, the IGP cost of the underlay
- Written by Bharathram Pattabhiraman
- Posted on August 31, 2023
- Updated on September 4, 2023
- 2808 Views
This solution allows delivery of IPv6 multicast traffic in an IP-VRF using an IPv4 multicast in the underlay network. The protocol used to build multicast trees in the underlay network is PIM Sparse Mode.
- Written by Madhu Sudan
- Posted on June 21, 2020
- Updated on February 21, 2024
- 6795 Views
Several customers have expressed interest in using IPv6 addresses for VXLAN underlay in their Data Centers (DC). Prior to 4.24.1F, EOS only supported IPv4 addresses for VXLAN underlay, i.e., VTEPs were reachable via IPv4 addresses only.
- Written by Adam Morrison
- Posted on January 3, 2022
- Updated on January 3, 2022
- 5079 Views
As of EOS 4.22.0F, EVPN all active multihoming is supported as a standardized redundancy solution. For effective
- Written by Bharathram Pattabhiraman
- Posted on February 11, 2021
- Updated on June 15, 2022
- 10617 Views
This solution allows the delivery of customer BUM (Broadcast, Unknown unicast and Multicast) traffic in a VLAN using
- Written by Bharathram Pattabhiraman
- Posted on August 31, 2023
- Updated on September 4, 2023
- 2470 Views
This solution optimizes the delivery of multicast to a VLAN over an Ethernet VPN (EVPN) network. Without this solution IPv6 multicast traffic in a VLAN is flooded to all Provider Edge(PE) devices which contain the VLAN.
- Written by Jeffrey Nelson
- Posted on June 21, 2021
- Updated on February 2, 2023
- 30280 Views
This feature provides the ability to interconnect EVPN VXLAN domains. Domains may or may not be within the same data
- Written by Xuan Qi
- Posted on August 23, 2022
- Updated on October 14, 2022
- 5788 Views
This feature extends the multi-domain EVPN VXLAN feature introduced to support interconnect with EVPN MPLS networks. The following diagram shows a multi-domain deployment with EVPN VXLAN in the data center and EVPN MPLS in the WAN. Note that this is the only supported deployment model, and that an EVPN MPLS network cannot peer with an EVPN MPLS network.
- Written by Swati Patel
- Posted on February 11, 2021
- Updated on November 10, 2021
- 8699 Views
[L2 EVPN] and [Multicast EVPN IRB] solutions allow for the delivery of customer BUM (Broadcast, Unknown unicast
- Written by Bharathram Pattabhiraman
- Posted on February 11, 2021
- Updated on September 21, 2023
- 17119 Views
This solution allows delivery of multicast traffic in an IP VRF using multicast in the underlay network. It builds on
- Written by Swati Patel
- Posted on January 3, 2023
- Updated on July 12, 2023
- 6116 Views
Multicast EVPN IRB solution allows for the delivery of customer BUM (Broadcast, Unknown unicast and Multicast) traffic in L3VPNs using multicast in the underlay network. This document contains only partial information that is new or different for the Multicast EVPN Multiple Underlay Groups solution.
- Written by Swati Patel
- Posted on October 27, 2021
- Updated on June 22, 2022
- 12572 Views
[L2 EVPN] and [Multicast EVPN IRB] solutions allow for the delivery of customer BUM (Broadcast, Unknown unicast and Multicast) traffic in a L2VPN and L3VPNs respectively using multicast in the underlay network.
- Written by Sandeep Betha
- Posted on January 31, 2022
- Updated on September 15, 2023
- 7209 Views
PIM External Gateways (PEGs) allow an EVPN overlay multicast network to interface with an external PIM domain. They can be used to interconnect two data centers using an external PIM domain in between them.
- Written by Rohit Maurya
- Posted on June 21, 2021
- Updated on July 13, 2022
- 9083 Views
Private VLAN is a feature that segregates a regular VLAN broadcast domain while maintaining all ports in the same IP
- Written by Jeevan Kamisetty
- Posted on December 22, 2020
- Updated on December 22, 2020
- 7745 Views
Arista MLAG supports STP for Layer 2 loop detection. In fact, most customers enable STP in their MLAG(s) to ensure no