For a pair of QSFP100 grouped together on a gearbox, it is possible to enable a 10G or 25G link on the first primary port

This document describes the configuration and behavior of physical interfaces on the 7368 series switches and

802.1X is an IEEE standard protocol that prevents unauthorized devices from gaining access to the network.

Filtered Mirroring allows certain packets to be selected for mirroring, rather than all packets ingressing or egressing a particular port.

This feature adds support for “Enhanced Route Refresh” capability (RFC7313). An enhanced route refresh is,

The BGP-LS extension allows IGPs (OSPF/IS-IS) link state database information to be injected into BGP. This is typically used in deployments where some external component, (like a controller or Path Computation Engine) can do centralized path computations by learning the entire IGP topology through BGP-LS. The controller can then communicate the computed paths based on the BGP-LS updates to the head end device in the network. The mechanism used by the controller to communicate the computed TE paths is outside the scope of this document. Using BGP-LS instead of an IGP peering with the controller to distribute IGP link state information has the following advantages.

The BGP graceful restart mechanism has a limitation that the graceful restart time cannot exceed 4095 seconds as per

Virtual ARP (VARP) allows multiple switches to simultaneously route packets from a common IP address in an active

Connectivity Monitor is an EOS feature that allows users to monitor their network resources from their Arista switches. The resources being monitored may or may not be Arista devices. Connectivity monitoring is unidirectional in nature.

This document describes the configuration and behavior of physical interfaces on the DCS 7060X4 series switches

Support for DHCPv4 (RFC 2131)  and DHCPv6 Server (RFC 8415) was added to EOS-4.22.1 and EOS-4.23.0 respectively. EOS DHCP server leverages ISC Kea as backend. The router with DHCP Server enabled acts as a server that allocates and delivers network addresses with desired configuration parameters to its hosts.

This feature adds a CLI knob to allow disabling the ENTITY STATE traps entStateOperEnabled &

In a Service Provider network, a Provider Edge (PE) device learns VPN paths from remote PEs and uses the Route Target

Dynamic CLI Access VLAN is a command that sets the effective access VLAN in a port without changing the running

This feature enables support for Macro Segmentation Service (MSS) to insert security devices into the traffic path

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.

Typical Wi Fi networks utilize a single, central Wireless LAN Controller (WLC) to act as a gateway between the

EOS supports the ability to match on a single VLAN tag (example: encapsulation dot1q vlan 10)  or a VLAN tag pair (example: encapsulation dot1q vlan 10 inner 20) to map matching packets to an interface. In this case, the encapsulation string is considered consumed by the mapped interface before forwarding, which means that the tags are effectively removed from the incoming packet for the purposes of any downstream forwarding.

gNOI (gRPC Network Operations Interface) defines a set of gRPC based microservices for executing operational

Generic UDP Encapsulation (GUE) is a general method for encapsulating packets of arbitrary IP protocols within a UDP tunnel. GUE provides an extensible header format with optional data. In this release, decap capability of GUE packets of variant 1 header format has been added. This variant allows direct encapsulation using the UDP header without the GUE header. The inner payload could be one of IPv4, IPv6, or MPLS.


In rare circumstances, a Single Event Upset may cause an underflow in the free list of buffers of a switch chip. This can

Level 1 2 routers set attached bit in their Level 1 LSPs to indicate their reachability to the rest of the network. A

A L2 sub-interface is a logical bridging endpoint associated with traffic on an interface distinguished by 802.1Q tags, where each <interface, 802.1q tag> tuple is treated as a first class bridging interface.


LDP End of LIB is a signaling enhancement defined in RFC 5919 to allow an LDP speaker to notify a neighbor when it has

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

Arista switches provide several mirroring features. Filtered mirroring to CPU adds a special destination to the

Currently, for any Mpls over Gre (MoG) Tunnel we allocate eedb resources for each resource type.

This article describes some enhanced mirroring configurations in addition to the ones described in

Support for running multiple CLI commands in one line separated by semicolons. Multiple CLI commands

The candidate configuration feature implements support for a candidate data store as specified in RFC6241.

An OSPF router can attract all traffic towards itself from within the OSPF network, by advertising a default route.

Section 9.5 of RFC2328 “OSPF Version 2” states that the mask in Hello packets should be set to when

This feature rewrites the overlay source MAC address of the packet which egresses the switch after the VXLAN

Policy-based routing (PBR) is a feature that is applied on routable ports, to preferentially route packets. Forwarding is based on a policy that is enforced at the ingress of the applied interface and overrides normal routing decisions. In addition to matches on regular ACLs, PBR policy-maps can also include “raw match” statements that look like a single entry of an ACL as a convenience for users.

This TOI describes a set of enhancements made to the existing Port Security: Protect Mode (PortSec-Protect) feature. Please see the existing TOI for this feature here:Port Security: Protect Mode

Power over Ethernet (PoE) is a way of delivering power and data over the same Ethernet wires. There have been multiple

This feature is an extension of Qos Policy. It allows the user to configure Qos Policy Map counters. If a class map is

This feature is an extension of Qos Policy. It allows the user to configure Qos Policy Map counters. If a class map is

This document describes the feature that allows redistribution of DHCPv6 routes into OSPFv3. This

Equal Cost Multi path (ECMP) provides the ability to load share traffic across multiple next hops.

This feature allows a Service Provider (SP) or an Enterprise to provide the service of interconnecting

Route Cache is a feature where users can configure Static EVPN VXLAN routes beyond the hardware capacity. The

This feature adds support for ‘match ip(v6) resolved next hop’ clause under route map config for BGP policy

The “set as path prepend” and “set as path match all replacement” route map configuration clauses now have a

Routing control functions (RCF) is a new language that can be used to express BGP route filtering and attribute

RSVP TE, the Resource Reservation Protocol (RSVP) for Traffic Engineering (TE), is used to distribute MPLS labels

This article describes the support for Filtered Mirroring using security ACL. The user can selectively mirror

The ‘show interfaces interactions’ command aims to provide users a resource that explains various relationships between ethernet interfaces. It describes interactions in which a configuration on an interface causes another set of interfaces to become inactive or have reduced capabilities.Examples include a primary interface consuming subordinate interfaces to service a four-lane speed or platform restrictions that require four interfaces of a port to operate at the same speed.

Subinterfaces divide a single ethernet or port channel interface into multiple logical L2 or L3 interfaces based on

This feature adds support for “Dynamic Load Balancing (DLB)” on Equal Cost Multi Path (ECMP) groups.
It is intended to help overcome the potential shortcomings of traditional hash-based load balancing by considering the traffic load of members of ECMP groups. DLB considers the state of the port while assigning egress ports to packets, resulting in a more even flow. The state of each port member is determined by measuring the amount of data transmitted from a given port and total number of packets enqueued to a given port.