- Written by Tarun Jaswanth LNU
- Posted on August 24, 2020
- Updated on March 16, 2023
- 9036 Views
802.1X is an IEEE standard protocol that prevents unauthorized devices from gaining access to the network.
- Written by Trevor Mendez
- Posted on December 20, 2021
- Updated on February 5, 2022
- 2944 Views
ACL based traffic management often requires matching packets’ destination addresses against one or more sets of
- Written by Jason Shamberger
- Posted on April 20, 2020
- Updated on February 11, 2022
- 4053 Views
RPKI provides a mechanism to validate the originating AS of an advertised prefix. EOS support
- Written by Shalini Kaleeswaran
- Posted on December 27, 2021
- Updated on December 27, 2021
- 3621 Views
ZeroTouch Provisioning (ZTP) is used to configure a switch without user intervention. Campus ZTP extends the
- Written by Travis Hammond
- Posted on December 29, 2021
- Updated on December 29, 2021
- 2775 Views
TCAM features matching on the same packet type and executing the same action are implicitly prioritized if both are
- Written by Terence Hui
- Posted on December 16, 2021
- Updated on December 16, 2021
- 2290 Views
Source port filtering is enabled by default to prevent traffic from egressing out the same interface it ingressed on.
- Written by Mike Nelson
- Posted on October 20, 2021
- Updated on December 20, 2021
- 2524 Views
Tagging traffic with a drop precedence is a method that can be used to differentiate traffic flows over a given
- Written by Praveen Kumar Yadav
- Posted on December 16, 2021
- Updated on December 16, 2021
- 2133 Views
This feature allows the user to have a custom DSCP To TC map per subInterface. By default,
- Written by Andrew Li
- Posted on November 9, 2020
- Updated on December 23, 2021
- 3061 Views
Normally the ingress router in the following diagram has no control over an autonomous system border router’s
- Written by Vamsi Anne
- Posted on December 29, 2021
- Updated on March 7, 2023
- 2911 Views
As Ethernet technologies made their way into the Metropolitan Area Networks (MAN) and the Wide Area Networks (WAN), from the conventional enterprise level usage, they are now widely being used by service providers to provide end-to-end connectivity to customers. Such service provider networks are typically spread across large geographical areas. Additionally, the service providers themselves may be relying on certain internet backbone providers, referred to as “operators”, to provide connectivity in case the geographical area to be covered is too huge.
- Written by Aaron Bamberger
- Posted on April 23, 2020
- Updated on August 26, 2022
- 3031 Views
E-Tree is an L2 EVPN service (defined in RFC8317) in which each attachment circuit (AC) is assigned a role of Root or Leaf.
- Written by Arpit Bansal
- Posted on January 6, 2023
- Updated on January 6, 2023
- 670 Views
For MPLS forwarded traffic the tunnel destination needs to know the address-family of the payload IP/IPv6 packet to correctly parse the header. On some platforms this address-family is deduced from the address family of the Bottom of stack( BOS ) MPLS label seen by the router or by relying on the Ether Type in the Ethernet header.
- Written by Edwin Tambi
- Posted on August 19, 2020
- Updated on December 8, 2022
- 6571 Views
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.
- Written by Matthew Carrington-Fair
- Posted on October 20, 2021
- Updated on December 30, 2021
- 2284 Views
Prior to EOS 4.27.0F, MPLS tunnel egress counters could only be enabled for all MPLS tunnels present in the system
- Written by Prajul Sreedharan
- Posted on January 22, 2019
- Updated on November 9, 2022
- 2986 Views
This feature introduces the support for IPv4 ACL configuration under GRE and IPsec tunnel interfaces. The
- Written by Aman Aman-Ul-Haq
- Posted on March 9, 2021
- Updated on March 20, 2023
- 3700 Views
The Segment security feature provides the convenience of applying policies on segments rather than interfaces or subnets. Hosts/networks are classified into segments based on prefixes. Grouping prefixes into segments allows for definition of policies that govern flow of traffic between segments. Policies define inter-segment or intra-segment communication rules, e.g. segment A can communicate with segment B but hosts in segment B can not communicate with each other.
- Written by Padmanabh Ratnakar
- Posted on October 7, 2021
- Updated on March 29, 2023
- 4597 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 Richard Goh
- Posted on August 16, 2018
- Updated on December 30, 2021
- 2831 Views
IPv6 multicast routing protocols are used to distribute IPv6 datagrams to one or more recipients. IPv6 PIM builds and
- Written by Priyesh Vakayil Palakandy
- Posted on December 20, 2021
- Updated on December 20, 2021
- 2376 Views
Enterprise networks span sites such as Public Cloud, Data Centers, Branches, Head Quarters. These sites are
- Written by Jyothish Kunkumath
- Posted on January 6, 2022
- Updated on October 25, 2022
- 3760 Views
IPSec tunnel mode support allows the customer to encrypt traffic transiting between two tunnel endpoints.
- Written by Jian Zhen
- Posted on December 18, 2019
- Updated on December 27, 2021
- 2536 Views
The document describes an extension of the decap group feature, that allows IPv6 addresses to be configured and used
- Written by Marc Laprade
- Posted on November 3, 2021
- Updated on February 14, 2023
- 2883 Views
This feature will allow the user to select whether port mirror destinations of type GRE tunnel include the optional “key” field in the GRE header on certain platforms. The key field allows the user to uniquely identify a particular packet flow. The feature also allows the user to specify the value of the 32 bit key field. The format of the key field within the GRE header can be seen in RFC 1701 - Generic Routing Encapsulation (GRE).
- Written by Andrew Li
- Posted on November 11, 2021
- Updated on December 28, 2021
- 3040 Views
Egress Peer Engineering (EPE) using BGP LU enables traffic engineering of the links between Autonomous Systems
- Written by Shyam Kota
- Posted on November 6, 2019
- Updated on December 30, 2021
- 2621 Views
This feature allows setting the desired maximum VOQ latency. Drop probabilities are adjusted in hardware to meet
- Written by John Clarke
- Posted on December 20, 2021
- Updated on October 21, 2022
- 3587 Views
Arista's 7130 Connect Series of Layer 1+ switches are powerful network devices designed for ultra low latency and offer a wealth of integrated management features and functionalities.
- Written by Alejandro Schwoykoski
- Posted on December 22, 2021
- Updated on November 7, 2022
- 3111 Views
MetaMux is an FPGA-based feature available on Arista’s 7130 platforms. It performs ultra-low latency Ethernet packet multiplexing with or without packet contention queuing. The port to port latency is a function of the selected MetaMux profile, front panel ingress port, front panel egress port, FPGA connector ingress port, and platform being used.
- Written by David Mirabito
- Posted on December 30, 2021
- Updated on January 11, 2023
- 3791 Views
MetaWatch is a FPGA-based feature available for Arista 7130 L-Series and LB-Series platforms. It provides precise timestamping of packets, aggregation and deep buffering for up to 48x Ethernet links at 10G. Timestamp information and other metadata such as device and port identifiers are appended to the end of the packet as a trailer.
- Written by Sandeep Betha
- Posted on December 18, 2019
- Updated on December 16, 2021
- 2708 Views
MLDv2 Snooping optimizes the transmission of multicast packets in Layer 2 by using Layer 3 information contained in
- Written by Chetan Patel
- Posted on January 17, 2022
- Updated on January 17, 2022
- 2273 Views
Arista EOS currently supports a maximum 6 labels push on R2 and R3 series platforms. This feature increases maximum
- Written by Binoshmon T B
- Posted on July 22, 2020
- Updated on June 27, 2022
- 4581 Views
The TCP MSS clamping feature involves clamping the maximum segment size (MSS) in the TCP header of TCP SYN packets if it exceeds the configured MSS ceiling limit for the interface. Clamping MSS value helps in avoiding IP fragmentation in tunnel scenarios by ensuring that MSS is small enough to accommodate the extra overhead of GRE and tunnel outer IP headers.
- Written by Thejesh Panchappa
- Posted on December 30, 2021
- Updated on December 30, 2021
- 2240 Views
Macro Segmentation Service with Layer 3 firewall (MSS FW) provides a mechanism to offload policy enforcement on TORs
- Written by Jeffrey Nelson
- Posted on June 21, 2021
- Updated on February 2, 2023
- 18747 Views
This feature provides the ability to interconnect EVPN VXLAN domains. Domains may or may not be within the same data
- Written by Swati Patel
- Posted on October 27, 2021
- Updated on June 22, 2022
- 5203 Views
[L2 EVPN] and [Multicast EVPN IRB] solutions allow for the delivery of customer BUM (Broadcast, Unknown unicast and Multicast) traffic in a L2VPN and L3VPNs respectively using multicast in the underlay network.
- Written by Shyam Kota
- Posted on June 21, 2021
- Updated on December 15, 2021
- 2410 Views
The per port scheduler compensation feature is used to make adjustments to the packet size seen by the scheduler for
- Written by Sandeep Betha
- Posted on January 31, 2022
- Updated on January 31, 2022
- 3308 Views
PIM External Gateways (PEGs) allow an EVPN overlay multicast network to interface with an external PIM domain. They
- Written by Saravanan Balasubramanian
- Posted on May 17, 2018
- Updated on December 30, 2021
- 2483 Views
This document describes how PIM non stop forwarding (NSF) works and its limitations. PIM supports non stop
- Written by Ethan Vadai
- Posted on March 6, 2020
- Updated on October 21, 2022
- 5560 Views
Policy based routing (PBR) is a feature that is applied on routable ports, to preferentially route packets.
- Written by Padmanabh Ratnakar
- Posted on April 20, 2021
- Updated on March 2, 2023
- 4757 Views
The postcard telemetry(GreenT - GRE Encapsulated Telemetry) feature is used to gather per flow telemetry information like path and per hop latency.
- Written by Sameer Pakalapati
- Posted on December 17, 2021
- Updated on December 17, 2021
- 1964 Views
This feature enables a 7170 using the stateless load balancer profile to act as a proxy for pings to VIPs (virtual IPs)
- Written by Sharad Birmiwal
- Posted on November 4, 2020
- Updated on February 11, 2022
- 7123 Views
Routing control functions (RCF) is a new language that can be used to express BGP route filtering and attribute
- Written by Paul Miiller
- Posted on December 15, 2021
- Updated on December 15, 2021
- 2142 Views
This feature adds a new CLI command which can be used to clear RSVP sessions. Clearing a session will remove the current
- Written by Tanuj Kumar Jhamb
- Posted on December 16, 2021
- Updated on September 2, 2022
- 2529 Views
This feature allows the user to configure upto 1023 unique QoS Policy-maps per chip.
- Written by Basil Saji
- Posted on January 17, 2022
- Updated on January 17, 2022
- 3308 Views
VXLAN UDP ESP support allows the customer to encrypt traffic between two VXLAN VTEPs. The frame
- Written by Dragos Maftei
- Posted on December 16, 2021
- Updated on December 16, 2021
- 2148 Views
This feature adds RSVP information for three tables from MPLS TE STD MIB:. mplsTunnelTable.
- Written by Shyam Kota
- Posted on June 13, 2019
- Updated on December 30, 2021
- 2378 Views
This feature modifies the display format of “show interface Tunnel <num> counters” on hardware
- Written by Navjot Singh Sandhu
- Posted on April 6, 2021
- Updated on December 17, 2021
- 2171 Views
This feature enables ACL functionality on subinterfaces. Release. Update. 4.17.0F . Support for
- Written by Josh Pfosi
- Posted on June 11, 2019
- Updated on March 29, 2023
- 4988 Views
This feature adds support for CPU traffic policy capable of matching and acting on IP traffic which would otherwise
- Written by Christopher Brown
- Posted on December 30, 2021
- Updated on December 30, 2021
- 2142 Views
ARP is a protocol that resolves an IPv4 neighbor address to a MAC address while IPv6 Neighbor Discovery is similar
- Written by Yin Chen
- Posted on December 17, 2021
- Updated on May 5, 2022
- 2267 Views
This article describes the usage of the ptp free-running source clock command, which selects a time source used by a switch running the Precision Time Protocol (PTP) while it is in a free-running state.
- Written by Gaofeng Yue
- Posted on December 20, 2021
- Updated on September 7, 2022
- 2420 Views
Currently EOS supports redistribution into BGP at the global (instance) level. Also EOS supports redistribution in