The Label Distribution Protocol (LDP) is a protocol in the Multiprotocol Label Switching (MPLS) context that allows

The LDP pseudowire feature provides support for emulating Ethernet connections over a Multiprotocol Label

Leaf Smart System Upgrade (SSU) provides the ability to upgrade the EOS image with minimal traffic disruption.Note: It is possible that SSU shutdown and bootup are not supported in the same image. If a product has shutdown support in image A and bootup support in a later image B, then SSU upgrade cannot be performed from image A to any images earlier than image B, including image A itself. However, upgrading from image A to image B onwards is allowed.

Link Fault Signalling (LFS) is a mechanism by which remote link faults are asserted over a link experiencing

TOI 4.20.1F

With the 14.0 release, CloudVision Cognitive Unified Edge (CV-CUE) removes the Wireless Manager(WM) UI dependency for login and for applying the service license. You will no longer be redirected to WM and can now directly login to CV-CUE from the UI. 

Support for Media Access Control Security (MACsec) with static keys was added in EOS 4.15.4. This feature brings

Maintenance mode is a framework to allow for the easy removal of elements of a switch or the entire switch from

Maintenance mode with sub interfaces is an extension to the maintenance mode feature released in EOS 4 15 2F. With this

A server cluster or a cluster is a group of Wireless Manager (WM) servers. A cluster comprises a parent WM server and one or more child WM servers.  A cluster is created to manage multiple servers using a single server. 

MapReduce Tracer is an existing feature that monitors MapReduce nodes that are directly connected to Arista

Classification of MPLS packets based on traffic class bits in MPLS header for QoS Policy Maps. DCS

TOI 4.20.1F

Currently, the 'maximum routes' knob allows one to set an upper bound on the number of routes that can be received from a

BGP TOI 4.17.0F

Media Access Control Security (MACSec) is an industry standard encryption mechanism to protect all traffic flowing

Arista switches provide several mirroring features. Filtered mirroring to CPU adds a special destination to the mirroring features that allows the mirrored traffic to be sent to the switch supervisor. The traffic can then be monitored and analyzed locally without the need of a remote port analyzer. Use case of this feature is for debugging and troubleshooting purposes.

In an MLAG setup, routing on a switch (MLAG peer) is possible using its own bridge/system MAC, VARP MAC or VRRP MAC. When a peer receives an IP packet with destination MAC set to one of the aforementioned MACs, the packet gets routed if the hardware has enough information to route the packet. Before introducing this feature, if the destination MAC is peer’s bridge MAC, the packet is L2 bridged on the peer-link and the routing takes place on the peer. This behavior to use the peer-link to bridge the L3 traffic to the peer is undesirable especially when the MLAG peers can route the packets themselves.

MLAG currently checks for basic MLAG configuration to be consistent (e.g. domain id) before formation with the peer.

When MLAG peer link goes down, the secondary peer assumes the primary peer is down/dead, and takes over the primary

Mlag TOI

In an MLAG setup, periodic TCP/UDP heartbeats are sent over peer link to ensure IP connectivity between peers. Prior

If an MLAG flaps on one peer, then we may have to remap the MAC addresses learned, such that the reachability is via the

The feature MP BGP Multicast provides a way to populate the MRIB (Multicast Routing Information Base). MRIB is an

TOI 4.20.1F

EOS 4.15.0F adds support for MPLS encapsulation of IP packets in EOS. The functionality is exposed through two

Multiprotocol Label Switching (MPLS) is a networking process that replaces complete network addresses with short

MPLS-over-GRE encapsulation support in EOS 4.17.0 enables tunneling IPv4 packets over MPLS over GRE tunnels. This feature leverages next-hop group support in EOS. With this feature, IPv4 routes may be resolved via MPLS-over-GRE next-hop group to be able to push one MPLS label and then GRE encapsulate the resulting labelled IPv4 packet before sending out of the egress interface.

This feature allows the Arista switch to act as the tunnel head for an MPLS tunnel and is exposed through two

While migrating from PVST to MSTP, or vice verse, the network engineer may choose not to run MSTP throughout the

Multi hop BFD  allows for liveness detection between systems whose path may consist of multiple hops. With an

TOI 4.20.1F

Multicast Only Fast Reroute (MoFRR) is a feature based on PIM sparse mode (PIM SM) protocol to minimize packet loss in a

TOI 4.20.1F

LANZ adds support for monitoring congestion on backplane (or fabric) ports on DCS 7304, DCS 7308, DCS 7316, DCS

In Tap Aggregation mode, an interface can be configured as tap or tool port. Tap ports are used to 'tap' the traffic and

The NAT Application Gateway (ALG) feature allows FTP connections between client server to be translated using

NAT Peer State Synchronization feature provides redundancy and resiliency for Dynamic NAT across a pair of devices in an attempt to mitigate the risk of single NAT device failure. Each switch advertises connection state updates to its peer.  State update consists of connection creation, connection state change (TCP mostly) or connection tear down

In the 13.0 release, CloudVision Cognitive Unified Edge (CV-CUE) adds a new report and also includes some enhancements to existing reports.

The nexthop group feature allows users to manually configure a set of tunnels. Nexthop group counters provide the ability to count packets and bytes associated with each tunnel nexthop, irrespective of the number of times it appears in one or more nexthop groups. In other words, if a nexthop group entry shares a tunnel resource with another entry, they will also share the same counter.

Nexthop selection using GRE key allows for nexthop routing selection based on the GRE key of a GRE encapsulated IP

Nexthop group match in PBR policy enables the user to match incoming packets being routed to a specified nexthop group

TOI 4.17.0F PBR

Vmware NSX Controllers expect Hardware VTEPs to monitor the liveness of the Replication Service Node via BFD.  In

The EOS Event Manager feature provides the ability to specify a condition and an action to be carried out when that

With the 15.0.1 release, CV-CUE extends the wired configuration and monitoring capabilities. You can now onboard switches (710P, 720XP, 720DP) to CV-CUE. You can also configure switches and manage switch-related settings directly from the UI.

 . These are the release notes and configuration guide for the OpenConfig feature available in the 4.20.1F EOS

TOI 4.20.1F

These are the release notes and configuration guide for the OpenConfig feature available in the EOS


OpenFlow 1.3 protocol is supported in EOS 4.15.0F on DCS 7050 and DCS 7050X series of switches. The switch and the

A new forwarding pipeline is being introduced in EOS 4.15.0F which allows the traffic entering the switch to be

Action TTL decrement in an OpenFlow flow. OpenFlow 1.3 Group support on DCS 7010 series. Clearing

With the 14.0 release, you can integrate OpenID Connect with a captive portal for authentication. The OpenID Connect integration functionality is available only for captive portals hosted on the Arista Cloud. It is not available if the captive portal is hosted on third-party servers or on the access point.

The OSPF Non Stop Forwarding (NSF) feature adds support for Graceful OSPF Restart (IETF RFC 3623) and Graceful OSPFv3

EOS 4.15.3F adds support for configuring auto cost in OSPFv3 for routed ethernet interfaces and LAG interfaces.

OSPF distribute list is a policy construct to filter out routes received from OSPF LSAs so that they will not be

The OSPF Max LSA Retransmission Threshold feature adds a configurable limit to the number of LSA update

OSPF Non Stop Forwarding (NSF) adds support for Graceful OSPF Restart, IETF RFC 3623 .  With OSPF Graceful Restart

This feature adds authentication support for OSPFv3. Unlike OSPFv2, OSPFv3 does not have authentication fields