- Written by Hyun Chul Chung
- Posted on June 10, 2020
- Updated on October 14, 2021
- 9102 Views
As of EOS 4.22.0F, EVPN all active multihoming is supported as a standardized redundancy solution. Redundancy
- Written by Kallol Mandal
- Posted on March 3, 2023
- Updated on March 7, 2023
- 6278 Views
In a VXLAN routing setup using VXLAN Controller Service (VCS), this feature will enable the following on a switch that is running as a VCS client.
- Written by Dongliang Feng
- Posted on September 11, 2023
- Updated on September 11, 2023
- 4938 Views
This is achieved by using the next-hop of the static route as the peer IP address for the BFD session. The static route is either installed or removed based on the status of the underlying BFD session. A static route whose next-hop is configured to be tracked by BFD is referred to as a ‘BFD tracked static route’ in the context of this document. This feature is supported for both IPv4 and IPv6 static routes.
- Written by Harish Prabhu
- Posted on April 18, 2022
- Updated on June 2, 2022
- 7271 Views
This feature introduces a new CLI command which disables the above-mentioned propagation of DSCP and ECN bits from the outer IP header.
- Written by Harish Prabhu
- Posted on August 31, 2023
- Updated on September 12, 2023
- 5580 Views
By default, the DSCP and ECN bits of VXLAN bridged packets are not rewritten. Currently, for bridged packets undergoing VXLAN encapsulation, the DSCP in the outer IP header is derived from TC and the ECN bits are set to zero. The desired behavior is that the outer IP header should be remarked with ingress packet DSCP and ingress packet ECN. Also, local congestion should be handled correctly.
- Written by Madhu Sudan
- Posted on April 26, 2021
- Updated on April 26, 2021
- 9426 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 May 10, 2024
- 12902 Views
As described in the Multi-VTEP MLAG TOI, singly connected hosts can lead to suboptimal peer-link utilization. By adding a local VTEP to each MLAG peer, the control plane is able to advertise singly connected hosts as being directly behind a specific local VTEP / MLAG peer.
- Written by Arup Raton Roy
- Posted on August 24, 2020
- Updated on December 27, 2021
- 8687 Views
This feature enables support for Macro Segmentation Service (MSS) to insert security devices into the traffic path
- Written by Alton Lo
- Posted on May 14, 2024
- Updated on May 15, 2024
- 2724 Views
This new feature explains the use of the BGP Domain PATH (D-PATH) attribute that can be used to identify the EVPN domain(s) through which the EVPN MAC-IP routes have passed. EOS DCI Gateway provides new mechanisms for users to specify the EVPN Domain Identifier for its local and remote domains. DCI Gateways sharing the same redundancy group should share the same local domain identifier and same remote domain identifier.
- Written by Lavanya Conjeevaram
- Posted on March 31, 2017
- Updated on November 29, 2023
- 13006 Views
Ethernet VPN (EVPN) is an extension of the BGP protocol introducing a new address family: L2VPN (address family
- Written by Lavanya Conjeevaram
- Posted on December 22, 2017
- Updated on August 16, 2024
- 9343 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 March 5, 2020
- Updated on July 31, 2023
- 11104 Views
This feature adds control plane support for inter subnet forwarding between EVPN and IPVPN networks. It also
- Written by Jeffrey Nelson
- Posted on October 28, 2020
- Updated on August 11, 2023
- 21270 Views
This feature adds control plane support for inter subnet forwarding between EVPN networks. This support is achieved
- Written by Alton Lo
- Posted on January 23, 2019
- Updated on January 23, 2019
- 15316 Views
“MLAG Domain Shared Router MAC” is a new mechanism to introduce a new router MAC to be used for MLAG TOR
- Written by Alton Lo
- Posted on April 27, 2020
- Updated on July 14, 2023
- 8555 Views
As described in the L3 EVPN VXLAN Configuration Guide, it is common practice to use Layer 3 EVPN to provide multi
- Written by Xuan Qi
- Posted on March 13, 2020
- Updated on March 13, 2020
- 11173 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
- 22595 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 September 19, 2024
- 6828 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). The WAN I-ESI allows the gateway’s EVPN neighbors to form L2 and L3 overlay ECMP on routes re-exported by the gateways. The identifier is shared by gateway nodes within the same domain (site) and set in MAC-IP routes that cross domain boundaries.
- Written by Mitchell Jameson
- Posted on February 5, 2020
- Updated on February 5, 2020
- 7663 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
- 10682 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
- 9355 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
- 12310 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
- 9389 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 November 18, 2024
- 8778 Views
Typical WiFi networks utilize a single, central Wireless LAN Controller (WLC) to act as a gateway between the wireless APs and the wired network. Arista differentiates itself by allowing the wireless network to utilize a distributed set of aggregation switches to connect APs to the wired network. This feature allows a decentralized and distributed set of aggregation switches to bridge wireless traffic on behalf of the set of APs configured to VXLAN tunnel all traffic to those aggregation switches, or their “local” APs.
- Written by Kamlesh Raghuvanshi
- Posted on April 19, 2021
- Updated on August 20, 2024
- 6643 Views
There are use cases where all broadcast, multicast and unknown MAC traffic are not needed to be flooded into the
- Written by Sourav Basu
- Posted on December 9, 2020
- Updated on July 12, 2023
- 17436 Views
In VXLAN networks, broadcast DHCP requests are head-end-replicated to all VXLAN tunnel endpoints (VTEP). If a DHCP relay helper address is configured on more than one VTEP, each such VTEP relays the DHCP request to the configured DHCP server. This could potentially overwhelm the DHCP server as it would receive multiple copies of broadcast packets originated from a host connected to one of the VTEPs.
- Written by Kallol Mandal
- Posted on December 12, 2024
- Updated on December 12, 2024
- 57 Views
Each ARP/ND packet into a switch may generate an update for the switch ARP/Neighbor table and this update may need to be synchronized with the MLAG peer when VXLAN is configured. Prior to this feature, these updates (on a VXLAN setup) are synchronized by sending an UDP packet (one packet per update) containing the IP/MAC/VLAN information from the MLAG peer where the ARP/ND packet is received to the other MLAG peer.
- Written by Satish Somanchi
- Posted on August 26, 2019
- Updated on September 5, 2019
- 8672 Views
4.22.1F introduces support for ip address virtual for PIM and IGMP in MLAG and Vxlan. On a VLAN, the same IP address can
- Written by Bharathram Pattabhiraman
- Posted on August 31, 2023
- Updated on September 4, 2023
- 5764 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 Shelly Chang
- Posted on October 24, 2024
- Updated on October 24, 2024
- 546 Views
This solution allows delivery of both IPv4 and IPv6 multicast traffic in an IP-VRF using an IPv6 multicast in the underlay network. The protocol used to build multicast trees in the underlay network is IPv6 PIM-SSM.
- Written by Madhu Sudan
- Posted on June 21, 2020
- Updated on November 5, 2024
- 10160 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
- 8747 Views
As of EOS 4.22.0F, EVPN all active multihoming is supported as a standardized redundancy solution. For effective
- Written by Kaladhar Musunuru
- Posted on May 4, 2020
- Updated on August 16, 2024
- 4388 Views
Ethernet VPN (EVPN) is an extension of the BGP protocol introducing a new address family: L2VPN (address family number 25) / EVPN (subsequent address family number 70). It is used to exchange overlay MAC and IP address reachability information between BGP peers using type-2 routes, but additionally, EVPN supports the exchange of layer 3 IPv4 and IPv6 overlay routes through the extensions described in (type 5 EVPN routes).
- Written by Johnny Chen
- Posted on September 15, 2023
- Updated on June 12, 2024
- 4862 Views
For traffic mirroring, Arista switches support several types of mirroring destinations. This document describes a new type of mirroring destination in which mirrored traffic is tunneled over VXLAN as the inner packet to a remote VTEP. This feature is useful for when the traffic analyzer is a VTEP reachable over a VXLAN tunnel.
- Written by Bharathram Pattabhiraman
- Posted on August 31, 2023
- Updated on September 4, 2023
- 5208 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 December 12, 2024
- 38930 Views
This feature provides the ability to interconnect EVPN VXLAN domains. Domains may or may not be within the same data center network, and the decision to stretch/interconnect a subnet between domains is configurable. The following diagram shows a multi-domain deployment using symmetric IRB. Note that two domains are shown for simplicity, but this solution supports any number of domains.
- Written by Xuan Qi
- Posted on August 23, 2022
- Updated on April 4, 2024
- 9416 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 Vincent Lam
- Posted on January 18, 2019
- Updated on March 22, 2024
- 13880 Views
In conventional VXLAN deployments, each MLAG pair of switches are represented as a common logical VTEP. VXLAN traffic can be decapsulated on either switch. In some networks, there are hosts that are singly connected to one of the MLAG pair.
- Written by Swati Patel
- Posted on February 11, 2021
- Updated on October 22, 2024
- 12851 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
- 25400 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
- 10085 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 September 4, 2024
- 18338 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 Xuan Qi
- Posted on April 18, 2024
- Updated on April 18, 2024
- 2976 Views
This feature adds all-active (A-A) multihoming support on the multi-domain EVPN VXLAN-MPLS gateway. It allows L2 and L3 ECMP to form between the multihoming gateways on the TOR devices inside the site and on the gateways in the remote sites. Therefore, traffic can be load-balanced to the multi-homing gateway and redundancy and fast convergence can be achieved.
- Written by Prashanth Krishnamurthy
- Posted on March 7, 2024
- Updated on March 8, 2024
- 3161 Views
This feature allows the packets to be VxLAN encapsulated after NAT translation, Reverse NAT translation applied on VxLAN tunnel terminated packets
- Written by Kaushik Kumar Ram
- Posted on March 3, 2023
- Updated on March 6, 2023
- 6419 Views
By default, when an SVI is configured on a VXLAN VLAN, then broadcast, unknown unicast, and unknown multicast (BUM) traffic received from the tunnel are punted to CPU. However, sending unknown unicast and unknown multicast traffic to CPU is unnecessary and could have negative side effects. Specifically, these packets take the L2Broadcast CoPP queue to the CPU.
- Written by Lavanya Conjeevaram
- Posted on March 31, 2017
- Updated on April 3, 2017
- 7500 Views
Overlay IPv6 routing over VXLAN Tunnel is simply routing IPv6 packets in and out of VXLAN Tunnels, similar to
- Written by Lavanya Conjeevaram
- Posted on March 13, 2017
- Updated on March 13, 2017
- 6821 Views
EOS currently supports VXLAN L2 integration with external controllers using the Arista OVSDB HW VTEP schema ([HW
- Written by Kallol Mandal
- Posted on January 17, 2019
- Updated on October 9, 2024
- 8253 Views
Selective ARP install is the selective programming of remote ARPs in hardware as received through EVPN Type 2 MAC-IP routes in an EVPN VXLAN/ MPLS Integrated Routing and Bridging (IRB) scenario. Instead of installing every MAC+IP binding received from EVPN into the hardware, the switch installs them only when there is routed traffic destined to the IP, thereby saving TCAM space on the switch. However, there is a tradeoff as there is an initial one-time latency to install the hardware TCAM entry on the first flow of routed traffic to the IP.
- Written by Aaron Bamberger
- Posted on June 5, 2023
- Updated on September 20, 2023
- 5739 Views
Enabling “Proxy ARP/ND for Single Aggregation (AG) VTEP Campus Deployments without EVPN” allows an aggregation VTEP to proxy reply to a VXLAN-encapsulated ARP request/NS when the ARP/NS target host is remote and the ARP/ND binding is already learned by the AG VTEP.
- Written by Rohit Maurya
- Posted on June 21, 2021
- Updated on July 13, 2022
- 13922 Views
Private VLAN is a feature that segregates a regular VLAN broadcast domain while maintaining all ports in the same IP