- Written by Neil Jarvis
- Posted on March 6, 2020
- Updated on October 27, 2022
- 10532 Views
Ingress policing provides the ability to monitor the data rates for a particular class of traffic and perform action when traffic exceeds user-configured values. This allows users to control ingress bandwidth based on packet classification. Ingress policing is done by a policing meter which marks incoming traffic and performs actions based on the results of policing meters.
- Written by Michael (Mike) Fink
- Posted on December 22, 2017
- Updated on September 25, 2023
- 13598 Views
Filtered Mirroring allows certain packets to be selected for mirroring, rather than all packets ingressing or egressing a particular port.
- Written by Jason Shamberger
- Posted on March 11, 2020
- Updated on April 18, 2024
- 15202 Views
EOS 4.21.3F introduces support for BGP Flowspec, as defined in RFC5575 and RFC7674. The typical use case is to filter or redirect DDoS traffic on edge routers.
- Written by Vipul Shah
- Posted on March 13, 2020
- Updated on May 4, 2022
- 8704 Views
The goal of IAR operation is to minimize the CPU processing and churn in hardware by identifying a set of nexthop adjacencies such that updating those adjacencies in-place is sufficient to correctly forward the traffic quickly for all the affected routes.
- Written by Vivek Subbarao
- Posted on January 18, 2019
- Updated on February 14, 2022
- 8464 Views
This feature adds support for a dynamic configuration model to eliminate the need for the network administrator to
- Written by Gary McCarthy
- Posted on February 8, 2017
- Updated on October 13, 2021
- 7411 Views
The default policy behavior is to permit/accept all routes when a BGP neighbor or peer group is configured with a route
- Written by Bill Conner
- Posted on March 12, 2020
- Updated on March 12, 2020
- 6978 Views
Sflow samples can be augmented with additional Extended gateway data by getting data from BGP in addition to
- Written by Bhavin Patel
- Posted on March 24, 2020
- Updated on February 15, 2024
- 9491 Views
This feature allows failover to the backup path to occur in constant time per interface going down for features such as RSVP link protection, RSVP node protection, TI-LFA link protection, and BGP PIC. Without this feature enabled, it would take time proportional to the number of paths going over the interface experiencing the link down event to failover to the backup path. With this feature enabled, the failover time would be constant regardless of the number of paths.
- Written by Shyam Kota
- Posted on March 12, 2020
- Updated on July 24, 2024
- 6094 Views
The CPU CoS mapping feature can be configured on Front panel ports, sub-interfaces, LAG and LAG sub-interfaces. SVIs and Tunnel interfaces are not supported at this time.
- Written by Rafat Mahmud
- Posted on March 6, 2020
- Updated on March 6, 2020
- 6879 Views
MPLS LDP traceroute utility has now been extended to support multipath traceroute. This allows network
- Written by Bohan Yang
- Posted on March 5, 2020
- Updated on February 1, 2023
- 7477 Views
QSFP+ transceiver supports 40G and 4x10G. This feature provides support for changing the default QSFP mode between
- Written by Alton Lo
- Posted on March 18, 2020
- Updated on April 4, 2024
- 17081 Views
In the Centralized Anycast Gateway configuration, the Spines are configured with EVPN IRB and are used as the IP
- Written by Jeffrey Nelson
- Posted on March 5, 2020
- Updated on July 31, 2023
- 10421 Views
This feature adds control plane support for inter subnet forwarding between EVPN and IPVPN networks. It also
- Written by Xuan Qi
- Posted on March 13, 2020
- Updated on March 13, 2020
- 10519 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 Mitchell Jameson
- Posted on February 5, 2020
- Updated on February 5, 2020
- 7086 Views
This feature enables support for an EVPN VxLAN control plane in conjunction with Arista’s OpenStack ML2 plugin for
- Written by Max Xiao
- Posted on March 6, 2020
- Updated on March 6, 2020
- 6720 Views
Fastdrop static is a feature that allows the static multicast routing agent to respond to cache miss messages and
- Written by Evelyn Wang
- Posted on March 5, 2020
- Updated on January 3, 2023
- 8468 Views
The FEC (= Forward Error Correction) traffic analyzer is designed to estimate the performance of the FEC layer, identify error statistics, and the source of correlated errors on physical interfaces.
- Written by James Shephard
- Posted on March 6, 2020
- Updated on July 12, 2023
- 6877 Views
Forwarding destination prediction enables visibility into how a packet is forwarded through the switch, allowing you to determine which interface(s) a packet would egress out of. This feature has been expanded upon with support for packets specified as a byte stream, allowing you to fully specify the packet.
- Written by Deepak Sebastian
- Posted on November 12, 2019
- Updated on May 7, 2024
- 8906 Views
This feature adds support for offloading BFD Transmit path to hardware (ASIC) for specific types of BFD sessions. This will improve accuracy of transmit timer implementations for BFD (especially with fast timers like 50 ms) and relieve pressure on the main CPU in scenarios of scale.
- Written by William Jung
- Posted on March 11, 2020
- Updated on April 20, 2020
- 8340 Views
IP Locking is an EOS feature configured on an Ethernet Layer 2 port. When enabled, it ensures that a port will only
- Written by Phillip Jie
- Posted on March 6, 2020
- Updated on March 6, 2020
- 6423 Views
This article describes the support for specifying DSCP mask in IPv4 access list. DSCP mask can be used to match
- Written by Navneet Sinha
- Posted on June 29, 2016
- Updated on July 30, 2024
- 13371 Views
Segment Routing provides mechanism to define end-to-end paths within a topology by encoding paths as sequences of sub-paths or instructions. These sub-paths or instructions are referred to as “segments”. IS-IS Segment Routing (henceforth referred to as IS-IS SR) provides means to advertise such segments through IS-IS protocol.
- Written by Nathan Wolfe
- Posted on February 15, 2018
- Updated on February 21, 2024
- 10970 Views
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.
- Written by Zackary Ayoun
- Posted on May 23, 2022
- Updated on July 19, 2023
- 9717 Views
LANZ is the EOS Latency and congestion ANalyZer. On DCS-7280, DCS-7020, DCS-7500 and DCS-7800 series, it allows monitoring congestion and transmit latencies on both front panel and CPU ports.
- Written by Sambath Kumar Balasubramanian
- Posted on March 12, 2020
- Updated on May 7, 2020
- 8936 Views
This feature enables MACsec service for non MACsec capable front panel ports. MACsec over front panel port is
- Written by Mark Lisee
- Posted on March 6, 2020
- Updated on March 6, 2020
- 6438 Views
This article describes speed configuration for the management SFP port. DCS 7300 SUP2. DCS 7300 SUP2 D
- Written by Mattar Amith Kini
- Posted on March 6, 2020
- Updated on July 6, 2022
- 7457 Views
This feature allows classification of packets based on the inner VLAN value along with the VLAN and CoS bits in a double tagged packet.
- Written by Abdul Haseeb Jehangir
- Posted on March 12, 2020
- Updated on July 17, 2024
- 10530 Views
Mirror on drop is a network visibility feature which allows monitoring of MPLS or IP flow drops occurring in the ingress pipeline. When such a drop is detected, it is sent to the control plane where it is processed and then sent to configured collectors. Additionally, CLI show commands provide general and detailed statistics and status.
- Written by Travis Hammond
- Posted on March 6, 2020
- Updated on March 6, 2020
- 5794 Views
This feature allows the removal of a configurable number of leading bytes from packets sent to a monitor session. A new
- Written by Simon Liang
- Posted on June 10, 2019
- Updated on March 13, 2020
- 6458 Views
Normally, Multiprotocol Label Switching (MPLS) determines the packet forwarding destination based on the top most
- Written by Jacob Sword
- Posted on March 6, 2020
- Updated on March 6, 2020
- 7397 Views
On DCS 7280E, DCS 7500E, DCS 7280R, DCS 7500R, DCS 7020R, DCS 7280R2, DCS 7500R2 systems, it is possible to select
- Written by Yuanzhi Gao
- Posted on March 6, 2020
- Updated on March 6, 2020
- 6240 Views
Prior to EOS 4.23.2F, BGP missing policy action configuration is a global BGP configuration that, when set to deny,
- Written by Kushagra Mohan
- Posted on March 18, 2020
- Updated on July 19, 2024
- 7908 Views
This feature enables per port TC-To-COS mapping, where TC represents Traffic-Class and COS represents Vlan tag PCP bits. While at present there is a global TC-To-COS mapping, we can use the TC-To-COS feature to create custom profiles which can be applied to the required interfaces.
- Written by Vivek Subbarao
- Posted on March 9, 2020
- Updated on July 8, 2020
- 7296 Views
Policy Control Service (PCS) is the integration of Arista CVX and VMWare NSX T to enable NSX T managed networks to
- Written by Ethan Vadai
- Posted on March 6, 2020
- Updated on March 14, 2024
- 15962 Views
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.
- Written by Phillip Jie
- Posted on December 19, 2019
- Updated on February 5, 2022
- 8460 Views
This article describes the support for specifying User Defined Fields(UDF) in Port ACLs including IPv4, IPv6, and
- Written by Eudean Sun
- Posted on March 9, 2020
- Updated on April 26, 2021
- 6783 Views
Power over Ethernet (PoE) is a way of delivering power and data over the same Ethernet wires. There have been multiple
- Written by Ruhi Saraf
- Posted on March 18, 2020
- Updated on March 18, 2020
- 7262 Views
This feature allows routes that were leaked from one VRF (the source VRF) into another VRF (the destination VRF) using
- Written by Ram Prasad
- Posted on October 22, 2018
- Updated on October 19, 2021
- 9786 Views
This feature allows a Service Provider (SP) or an Enterprise to provide the service of interconnecting
- Written by Akshay Kawale
- Posted on March 11, 2020
- Updated on March 11, 2020
- 10314 Views
This feature provides support for advertising IPv4 unicast Network Layer Reachability Information (NLRI) with
- Written by Deeksha Srivastava
- Posted on March 12, 2020
- Updated on March 16, 2020
- 6578 Views
This feature adds support for ‘match interface’ clause under route map config for Bgp policy application in
- Written by David Cronin
- Posted on August 26, 2019
- Updated on October 25, 2021
- 8468 Views
This document describes a new CLI command to help debug how and why route maps permit and deny paths. The aim of this CLI
- Written by Martin Stigge
- Posted on October 22, 2018
- Updated on July 19, 2024
- 9853 Views
RSVP-TE applies the Resource Reservation Protocol (RSVP) for Traffic Engineering (TE), i.e., to distribute MPLS labels for steering traffic and reserving bandwidth.
- Written by Michael Sparacio
- Posted on August 16, 2018
- Updated on June 20, 2019
- 7336 Views
These are the release notes and configuration guide for the OpenConfig feature in the 4.21.0F release.
- Written by Aparna Karanjkar
- Posted on March 13, 2020
- Updated on March 13, 2020
- 7640 Views
4.23.2F release supports reading and streaming various OpenConfig configuration and state models over gNMI (gRPC
- Written by John Nelson
- Posted on March 5, 2020
- Updated on March 5, 2020
- 7040 Views
When a high speed serial communication link is established, the two ends communicate with each other over a
- Written by Alon Pekurovsky
- Posted on March 5, 2020
- Updated on June 16, 2022
- 8681 Views
A secure erase is generally defined as a command (or set of commands) that deliberately, permanently and
- Written by Anais Taing
- Posted on March 13, 2020
- Updated on August 14, 2024
- 7314 Views
The Tap Aggregation timestamping feature supports both timestamping packets in TAI (International Atomic Time)
- Written by Vipul Shah
- Posted on August 27, 2019
- Updated on November 23, 2023
- 6818 Views
BGP routing information often contains more than one path to the same destination network. The BGP best-path selection algorithm determines which of these paths should be considered as the best path to that network.
- Written by Anil Joshi
- Posted on March 13, 2020
- Updated on April 4, 2024
- 6244 Views
This document describes the support of VxLAN Bridging and Routing on the R3 series of DCS 7280, 7500 and 7800 Arista