EOS 4.20.1F TOI

This features enables ARPs learnt on an SVI interface to be converted into Host routes which can further be

This feature detects whether a given EOS image is MLAG ISSU compatible with the currently running version on a switch.

BFD for static routes enables monitoring of directly connected next hop reachability using a BFD session. This is

This document describes BFD RFC7130 mode on EOS. RFC7130 defines a mechanism to run BFD protocol over port channels with an independent asynchronous BFD session on every port channel member link. With RFC7130 support, the port channel member link will be removed from forwarding if the BFD session state transitions from UP to DOWN on the member link. This is useful for quickly detecting failures where L1 stays connected but the interface is unable to forward traffic.

The aggregate address advertise only feature adds the capability of NOT installing the Null0 route in the FIB/kernel

Prior to this release, BGP in “ribd” mode (when routing protocols are configured in

BGP Monitoring Protocol (BMP) [1] allows a monitoring station to connect to a router and collect all of the BGP

Nexthop Groups allow users to manually configure a set of nexthops by specifying their nexthop addresses and

This feature adds support for a 'match route type' route map match clause in release 4.20.1F. This clause allows

Bidirectional PIM has information on Bidirectional Protocol Independent Mulicast (PIM). Additional information

Connectivity Fault Management (CFM) is used in Virtual Bridged Local Area Networks for detecting, isolating, and

Config checkpoint mechanism provides a shortcut to copy the current running config into a file stored in checkpoint

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.

Management tools used by customers, in most cases, don’t know beforehand which controller in a CVX HA cluster is the

DHCPv6 Prefix Delegation support enables a DHCP relay agent to program routes for addresses assigned by a DHCP server. The assigned prefixes could either be DHCPv6 IA_PD prefix delegation addresses, or DHCPv6 IA_NA global /128 addresses.

This feature allows eAPI to run in multiple non default VRFs on the same physical router. In this way, users can

EOS 4.20.1F introduces expanded VRRP, VARP and MLAG Peer Gateway virtual MAC capabilities on the 7500R, 7280R,

Ethernet VPN (EVPN) is an extension of the BGP protocol introducing a new address family: L2VPN (address family

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.

MPLSoGRE Filtered Mirroring is a specialized version of Mirroring to GRE Tunnel and Filtered Mirroring in which

Hardware Table Capacity Monitoring is a new feature to keep track of the capacity and utilization of various hardware forwarding resources and generate alerts/syslogs when the utilization exceeds a threshold value. Users can keep track of the current usage statistics using a single show command, and also configure thresholds on a per-resource basis, to be notified about any high-utilization upfront, before reaching any resource limits. The Main use-case would be for troubleshooting in overflow situations and avoid overflows altogether by taking corrective actions on high utilization.

Hierarchical Forwarding Equivalence Class (HFEC) changes a FEC from a single flat level to a multi level FEC

The IPv6 Neighbor Discovery protocol performs Neighbor Unreachability Detection (NUD) in order to determine if two

IPv6 Router Advertisement Consistency Logging, when enabled, allows for notification through syslogging of

IS IS Graceful Restart adds support for Restart Signaling for IS IS, IETF RFC 5306. When IS IS is used

This feature is available when configuring BGP in the multi agent routing protocol model. Ethernet

L3 interface ingress counters can be used to count routable traffic coming into the box on sub interfaces and vlan

Introduced in EOS-4.20.1F, “selectable hashing fields” feature controls whether a certain header’s field is used in the hash calculation for LAG and ECMP.

LANZ on 7160S 32CQ, 7160 48YC6 and 7160 48TC6 adds support for monitoring congestion on front panel ports with Start,

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

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

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

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

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

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

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

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

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

EOS release 4.20.1F adds OSPFv3 flood pacing support that allows configuring the minimum interval between the

PIM Static Source Discovery (SSD) is a feature implemented as part of PIM-SM. Familiarity with setting up and configuring PIM-SM (Sparse Mode) and PIM-SSM (Source-Specific Multicast) is assumed.

Traffic is managed through policy maps that apply data shaping methods to specific data streams. A policy map is a data

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

This feature adds support for "sequential" processing of route-map 'set ext/community' clauses. This feature is enabled via a configuration knob and there is no change in behavior without enabling this knob. The default route-map processing behavior can be summarized as "add then delete".

The BGP labeled unicast (LU) RFC is used to advertise BGP routes with a stack of MPLS labels, thereby allowing

Multi Agent, Platform independent. This feature supports RFC 7606, which  provides improved security and

Hardware Table Capacity Monitoring is an existing feature to keep track of the capacity and utilization of various

This article describes a new TAP Aggregation TCAM profile and a corresponding enhancement to the TAP Aggregation

This article describes the Tap Aggregation Traffic Steering on MPLS Labels feature. The purpose of this feature is to

This feature was introduced in 4.18.2F. All future releases are expected to support User Defined Fields.

This document describes the truncation capability for Tap Aggregation, which allows tapped traffic to be truncated to a smaller size before being transmitted.