- Written by Gaofeng Yue
- Posted on January 23, 2019
- Updated on March 26, 2025
- 11580 Views
FIB compression allows us to program routes into the hardware more efficiently. Routes are programmed in the route
- Written by Lavanya Conjeevaram
- Posted on June 6, 2017
- Updated on December 22, 2017
- 9630 Views
MPLSoGRE Filtered Mirroring is a specialized version of Mirroring to GRE Tunnel and Filtered Mirroring in which
- Written by Prachi Modi
- Posted on May 8, 2025
- Updated on May 8, 2025
- 251 Views
With the 19.0 release, you can apply filters to report data before generating or scheduling a report. Previously, you manually filtered out the relevant data from the generated report. Applying filters before generating a report helps streamline the data, speeds up report generation, and improves its readability. With filters, you can create a customized report based on your specific needs.
- Written by Dhruba Jyoti Pokhrel
- Posted on July 16, 2024
- Updated on July 16, 2024
- 3025 Views
Organizations may have multiple access points (APs) of different models operating with various firmware versions. As an organization, you may want to designate a specific version as a compliant firmware version for a certain model. Assigning a compliant firmware version helps network administrators identify non-compliant AP models by generating notification alerts.
- Written by Mattar Amith Kini
- Posted on December 27, 2024
- Updated on December 27, 2024
- 1785 Views
This document describes the CLI introduced to reallocate ECMP FEC banks on different levels in a hierarchical FEC configuration. Users may run out of entries on a certain level with other levels having little to no usage, and this CLI reconfigures the ECMP FEC entries to meet the requirements of the user.
- Written by Prachi Modi
- Posted on January 17, 2024
- Updated on January 17, 2024
- 4909 Views
With the 16.0 release, CloudVision Cognitive Unified Edge (CV-CUE) introduces the following enhancements to Floor Plans:
- Written by Harry Dhillon
- Posted on April 29, 2025
- Updated on April 29, 2025
- 672 Views
Latency and drop information help determine if there is a loss in a particular flow and where the loss occurred. A Service Node action configured as a DANZ Monitoring Fabric (DMF) managed service has multiple separate taps or spans in the production network and can measure the latency of a flow traversing through any pair of these points. It can also detect packet drops between any two points in the network if the packet only appears on one point within a specified time frame, currently set to 200ms.
- Written by Chris Pearson
- Posted on September 24, 2024
- Updated on September 24, 2024
- 2587 Views
This feature provides a way to distinguish groups of flows within encrypted GRE tunnels. That enables downstream forwarding devices to process multiple flows in parallel while maintaining packet order within individual flows. Parallel processing offers the opportunity for significant aggregate throughput improvement.
- Written by Marc Pawlowsky
- Posted on March 7, 2025
- Updated on May 15, 2025
- 1349 Views
The agent DmaQueueMonitor provides visibility into packets coming up to the CPU via CPU queues. Packets are continuously sampled on monitored queues and kept available for reporting when a CPU congestion event occurs. When a queue that leads to CPU processing is congested a PCAP file may be created from the sampled packets that were captured from before and after the congestion event. The PCAP file is written to the file system for off-line examination.
- Written by Mihyar Baroudi
- Posted on December 8, 2015
- Updated on December 21, 2015
- 8133 Views
This feature enables detection of abnormal system flows (total in vs. out packet counters) by showing packet loss
- Written by Surapaneni Venkata Gopi Krishna
- Posted on June 16, 2022
- Updated on October 11, 2024
- 11456 Views
Flow control is a data transmission option that temporarily stops a device from sending data because of a peer data overflow condition. If a device sends data faster than the receiver can accept it, the receiver's buffer can overflow. The receiving device then sends a PAUSE frame, instructing the sending device to halt transmission for a specified period.
- Written by Canberk Akcali
- Posted on September 12, 2024
- Updated on September 12, 2024
- 2829 Views
Forced periodic ARP refresh adds support for a mechanism that allows forcing ARP/NDP refresh requests to be sent in periodic intervals independently of ARP/NDP entries' confirmed time in the kernel. By default, when a neighbor entry gets confirmed by various processes such as ARP synchronization between MLAG peers, an ARP refresh request is not sent for at least another duration of ARP aging timeout (or ND cache expiry time for the IPv6 case). This feature provides support for a configuration to force sending refresh requests at the configured ARP/ND aging timeout regardless of the last confirmed time.
- Written by Dhruba Jyoti Pokhrel
- Posted on December 16, 2024
- Updated on December 16, 2024
- 1754 Views
With the 18.0 release, you can send a copy of DHCP Packets from Access Points (AP) to Network Access Control (NAC) solutions for profiling clients and assigning appropriate network segments. When you enable the packet forwarding option on the UI, the AP forwards a copy of the DHCP packets to Port 67 of the destination server.
- Written by Dhruba Jyoti Pokhrel
- Posted on April 1, 2024
- Updated on April 1, 2024
- 4115 Views
This feature lets you freeze the channel and transmit power in the Auto mode to operate a specific radio at a specific channel number and transmit power. To switch to other channels, unfreeze the settings and select a custom channel and power, or enable the Auto mode to select the optimum channel and transmit power. Freeze and unfreeze Auto Channel Selection (ACS) and Transmit Power Control (TPC) configurations are configured for each radio. You can select multiple radios and freeze the ACS and TPC settings.
- Written by David Joseph
- Posted on December 24, 2024
- Updated on December 24, 2024
- 1826 Views
This feature adds support for the front panel Ethernet (Et) interface counters on the platforms listed below and enables the Et interfaces to dynamically adopt the counter values (packet and error)1 of interfaces (Switch, App interfaces etc.) related to the currently running FPGA application, based on user or default configuration. All Arista FPGA applications are supported. Both the receive and transmit packet counters can be independently configured for each interface, as desired. Counters are supported for interfaces of any speed including agile ports.
- Written by Kaushik Kumar Ram
- Posted on August 21, 2020
- Updated on October 17, 2024
- 11783 Views
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.
- Written by Syed Rahi
- Posted on September 30, 2015
- Updated on February 7, 2022
- 7986 Views
When a user configures IPv6 ACLs, by default, the system automatically includes two additional rules : a default
- Written by Pankaj Srivastava
- Posted on December 20, 2024
- Updated on December 20, 2024
- 1992 Views
This feature provides a CLI to disable storm control policing on known multicast streams. By default, known multicast streams are policed by storm control policers and the behavior is consistent across all platforms supporting storm control feature. With the new CLI we can change the default policing behavior for known multicast streams.
- Written by Nathan Wolfe
- Posted on June 29, 2016
- Updated on June 29, 2016
- 9790 Views
Users can now define a global LAG hashing profile. The global LAG hashing profile will be applied to all linecards
- Written by Ajanthasingam Jegasingam
- Posted on January 2, 2025
- Updated on January 2, 2025
- 1754 Views
This is an implementation of the gNOI Healthz RPCs (version 1.3.0). Note that RPC elements of the Healthz service are supported, and as of 4.33.1F, only the agent information is exposed in healthz yang component containers outlined as in the healthz service.
- Written by Prachi Modi
- Posted on December 16, 2024
- Updated on December 16, 2024
- 1741 Views
In the 18.0 release, along with Slack, you can also subscribe to Google Chat and Microsoft Teams webhooks to receive alerts in your conversation channels whenever a network issue or anomaly is detected. Note: This is a BETA feature. Reach out to your Arista account manager to enable it.
- Written by Shubhangi Singh
- Posted on October 24, 2024
- Updated on October 24, 2024
- 2262 Views
This is an extension to the IKE policy and SA policy configuration options available in EOS. The key lifetimes for IKE policies and SA policies are specifiable in hours. This feature allows specifying the key lifetimes in minutes as well.
- Written by Prajul Sreedharan
- Posted on January 22, 2019
- Updated on December 30, 2024
- 10981 Views
This feature introduces the support for IPv4 ACL configuration under GRE and IPsec tunnel interfaces and IPv6 ACL configuration under GRE tunnel interfaces. The configured ACL rules are applied to a tunnel terminated GRE packet i.e. any IPv4/v6-over-GRE-over-IPv4 that is decapsulated by the GRE tunnel-interface on which the ACL is applied, or a packet terminated on IPsec tunnel i.e, IPv4-over-ESP-over-encrypted-IPv4 packet that is decapsulated and decrypted by the IPsec tunnel interface on which the ACL is applied.
- Written by Qin Zhang
- Posted on September 30, 2015
- Updated on July 21, 2023
- 8173 Views
By default, inner IP header of a GRE packet is used for LAG hashing. With this feature, LAGs can hash GRE traffic
- Written by Srinivasan Koona Lokabiraman
- Posted on July 2, 2025
- Updated on July 2, 2025
- 10 Views
The feature allows a GRE tunnel to be resolved over another GRE tunnel. The two GRE tunnels may be in the same VRF or different VRFs.
- Written by Gowtham Rameshkumar
- Posted on March 11, 2020
- Updated on May 21, 2025
- 13949 Views
This feature introduces hardware forwarding support for IPv4-over-IPv4 GRE tunnel interfaces on selected Arista
- Written by Abhiram Kalluru
- Posted on December 20, 2019
- Updated on March 25, 2025
- 10450 Views
gRIBI (gRPC Routing Information Base Interface) defines an interface through which OpenConfig AFT (Abstract Forwarding Table) entries can be injected from an external client to a network element.
- Written by Pedro Coutinho
- Posted on August 25, 2016
- Updated on June 11, 2019
- 11317 Views
This feature involves the use of packet’s Time to Live (TTL) (IPv4) or Hop Limit (IPv6) attributes to protect
- Written by Utkarsha Verma
- Posted on February 18, 2021
- Updated on April 14, 2025
- 12682 Views
Arista campus switches allow extensive and fine grained hardware based flow tracking and management features. They
- Written by Ramakrishnan G
- Posted on February 8, 2017
- Updated on September 7, 2020
- 8768 Views
In ingress/egress and fabric/egress replication mode, on DCS 7280E, DCS 7280R, DCS 7500E and DCS 7500R, Broadcast,
- Written by Vincent Lam
- Posted on May 1, 2015
- Updated on May 1, 2015
- 8239 Views
The Hardware Switch Controller (HSC) provides an integration point between the SDN controllers (NSX or Nuage) and
- Written by Anoop Dawani
- Posted on September 30, 2015
- Updated on November 26, 2024
- 9354 Views
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.
- Written by Stefan Rebaud
- Posted on May 17, 2018
- Updated on August 20, 2024
- 12860 Views
EOS-4.20.5 adds support for hardware-accelerated sFlow on compatible R2 platforms.
- Written by Zhuohui Tan
- Posted on December 22, 2017
- Updated on October 8, 2018
- 9971 Views
Hierarchical Forwarding Equivalence Class (HFEC) changes a FEC from a single flat level to a multi level FEC
- Written by Scott Smith
- Posted on October 18, 2024
- Updated on February 5, 2025
- 2454 Views
This feature allows capturing packets and byte counts at high resolution on physical interfaces, down to 1 ms granularity. Allows for detecting anomalous packet flows, or confirming the expected bandwidth usage. Requires selecting a set of interfaces to sample, a time resolution, and sampling duration.
- Written by Aditi Vaidya
- Posted on August 23, 2019
- Updated on August 23, 2019
- 9694 Views
Keeping Wi Fi Access Point (AP) firmware up to date allows network administrators to take advantage of the latest
- Written by Rashid Akhtar
- Posted on December 17, 2024
- Updated on December 17, 2024
- 1899 Views
This feature introduces support for scaling both IPv4 and IPv6 hosts on our devices. Existing MDB profiles offer a maximum host scale of 128k with unique MAC rewrites. However, if hosts share the MAC rewrites, the scale can reach up to 204k. To address this issue, we are introducing a new MDB profile that will support a host scale of up to 192k when each host has a unique MAC rewrite. If hosts share the MAC rewrites, the scale can reach up to 256k.
- Written by Prachi Modi
- Posted on February 20, 2023
- Updated on February 20, 2023
- 6345 Views
Hotspot 2.0 is a standard for public-access Wi-Fi that enables seamless roaming among Wi-Fi networks and between Wi-Fi and cellular networks. With Hotspot 2.0, Passpoint-certified mobile devices such as laptops and smartphones can automatically discover and connect to Wi-Fi networks without the need of signing in manually. It is based on IEEE 802.11u standard for Interworking with External Networks.
- Written by Prachi Modi
- Posted on July 7, 2023
- Updated on July 7, 2023
- 5857 Views
With the 15.0 release, CloudVision Cognitive Unified Edge(CV-CUE) provides you the ability to list down Vulnerable SSIDs and Hotspot SSIDs. CV-CUE takes action on the listed SSIDs according to the applied WIPS policy.
- Written by Madhu Sudan
- Posted on March 31, 2017
- Updated on July 13, 2017
- 8566 Views
External controllers can communicate with HSC (Hardware Switch Controller) running on CVX/EOS using the OVSDB
- Written by Alexandru Bran
- Posted on October 24, 2024
- Updated on October 24, 2024
- 2185 Views
This is an extension to BGP EVPN VPNs that allow us to use iBGP as the PE-CE protocol. This feature also provides a way to isolate the customer’s network BGP attributes from the SP backbone’s attributes, by saving them into a special attribute called ATTR_SET, code 128. This separation introduces a “route server” model that allows the customer’s BGP path attributes to be stored in the SP backbone along with the VPN-IPv4/v6 paths.
- Written by Bill Fenner
- Posted on October 24, 2024
- Updated on October 24, 2024
- 2393 Views
ICMP Probe allows querying of interface status and ARP or Neighbor Discovery table status remotely. It is a request/response protocol, similar to ping, but instead of simply responding to the request, it responds with information about a local interface or a remote neighbor. The node being queried is called the "proxy node"
- Written by Avininder Grewal
- Posted on September 30, 2015
- Updated on September 30, 2015
- 8318 Views
Arista switches enable high precision time distribution directly in the data path using IEEE1588 Precision Time
- Written by Shyam Kota
- Posted on February 8, 2017
- Updated on July 6, 2020
- 8350 Views
IGMP Snooping Proxy feature is an optimization over IGMP snooping. When IGMP Snooping Proxy is enabled, the switch
- Written by Pauric Ward
- Posted on March 3, 2023
- Updated on March 20, 2025
- 7677 Views
This feature enables the user to configure a list or range of BGP attributes to be ignored by the router on receipt of a BGP update message. The BGP attributes are discarded from the BGP update message, and unless the action of discarding an attribute causes the update message to trigger error handling, then the update message is parsed as normal.
- Written by Dhruba Jyoti Pokhrel
- Posted on July 7, 2023
- Updated on July 7, 2023
- 5980 Views
You can import Ekahau floor plans to CloudVision Cognitive Unified Edge (CV-CUE) and then manage the access points (AP) from CV-CUE. Once you import the floor plan to CV-CUE, you can map the AP to CV-CUE and start managing the AP.
- Written by Kallol Mandal
- Posted on December 12, 2024
- Updated on December 12, 2024
- 2092 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 Padmanabh Ratnakar
- Posted on October 7, 2021
- Updated on March 20, 2025
- 15415 Views
For network monitoring and troubleshooting flow related issues, it is desirable to know the path, latency, queue and congestion information for flows at different times. The inband telemetry feature(INT), based on Inband Flow Analyzer RFC draft -IFA 2.0 and IFA 1.0(on some platforms) , is used to gather per flow telemetry information like path, per hop latency and congestion. INT is supported for both IPv4 and IPv6 traffic.
- Written by Jayden Navarro
- Posted on February 8, 2017
- Updated on February 9, 2017
- 8254 Views
Incoming LACPDU Rate Limit on Arista switches allows for errdisabling of ports experiencing a sustained rate of
- Written by Prachi Modi
- Posted on February 20, 2023
- Updated on February 20, 2023
- 6258 Views
With the 14.0 release, CV-CUE introduces an Infrastructure Dashboard that provides an overview of the health of all managed access points (APs).You can view the Infrastructure Dashboard by navigating to