- Written by Digvijay Gahlot
- Posted on 4月 20, 2021
- Updated on 1月 23, 2023
- 12618 Views
The L2 EVPN MPLS feature is available when configuring BGP in the multi-agent routing protocol model. Ethernet VPN (EVPN) is an extension of the BGP protocol introducing a new address family: L2VPN (address family number 25) / EVPN (subsequent address family number 70). It is used to exchange overlay MAC and IP address reachability information between BGP peers.
- Written by Ziqian XU
- Posted on 10月 21, 2021
- Updated on 10月 21, 2021
- 8277 Views
Support for AES GCM has been added as a method for storing symmetric secrets in EOS. This applies to secrets that must be
- Written by Gary McCarthy
- Posted on 2月 8, 2017
- Updated on 10月 13, 2021
- 7923 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 Manoj Agiwal
- Posted on 9月 30, 2015
- Updated on 7月 12, 2024
- 17679 Views
BGP Non Stop Forwarding (NSF) aims to minimize the traffic loss when the the following scenarios occur:
- Written by Ketan Kotak
- Posted on 11月 7, 2021
- Updated on 11月 7, 2021
- 7435 Views
This feature improves the switch behavior when it overheats. The feature can be configured using the CLI.
- Written by Jeevan Kamisetty
- Posted on 8月 16, 2018
- Updated on 11月 2, 2021
- 6896 Views
DHCPv6 relay supports Remote ID option (37) insertion in relay messages providing the Layer 3 interface name on which
- Written by Mike Nelson
- Posted on 10月 20, 2021
- Updated on 12月 20, 2021
- 8169 Views
Tagging traffic with a drop precedence is a method that can be used to differentiate traffic flows over a given
- Written by Jeff Wen
- Posted on 1月 21, 2019
- Updated on 11月 30, 2023
- 10093 Views
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.
- Written by Wade Carpenter
- Posted on 4月 24, 2020
- Updated on 7月 15, 2024
- 16272 Views
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.
- Written by James Shephard
- Posted on 8月 25, 2019
- Updated on 7月 5, 2023
- 11037 Views
Forwarding destination prediction enables visibility into how a packet is forwarded through the switch, allowing you to determine which interfaces a packet would egress out of. Typical use cases include, but are not limited to, determining egress members for Port-Channels and ECMPs.
- Written by Charlotte Fedderly
- Posted on 6月 22, 2021
- Updated on 2月 24, 2022
- 7668 Views
Forwarding destination prediction enables visibility into how a packet is forwarded through the switch and allows
- Written by Seng Leung
- Posted on 10月 27, 2021
- Updated on 10月 27, 2021
- 8672 Views
Traditionally, the OpenConfig gNMI service is based on a dial in model. A client sends a request to the gNMI server and
- Written by Matthew Carrington-Fair
- Posted on 10月 20, 2021
- Updated on 12月 30, 2021
- 7255 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 Shyam Kota
- Posted on 4月 9, 2021
- Updated on 11月 2, 2021
- 8162 Views
gNOI (gRPC Network Operations Interface) defines a set of gRPC based microservices for executing operational
- Written by Utkarsha Verma
- Posted on 2月 18, 2021
- Updated on 11月 17, 2021
- 9245 Views
Arista campus switches allow extensive and fine grained hardware based flow tracking and management features. They
- Written by Arpit Bansal
- Posted on 12月 21, 2020
- Updated on 1月 17, 2022
- 8391 Views
IGP shortcuts enable traffic to get forwarded along traffic engineered paths computed by RSVP using a modified SPF
- Written by Neel Neogi
- Posted on 11月 3, 2021
- Updated on 7月 13, 2023
- 8211 Views
This document describes the support for interface policing counters on interfaces where interface policing feature is configured. Counters for this feature provide information on how many packets are being allowed or dropped on a given interface via the policers configured. The counters are only supported on interfaces where dedicated policers are configured.
- Written by Bharath Somayaji
- Posted on 11月 12, 2019
- Updated on 11月 12, 2019
- 9837 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 Nitin Sao
- Posted on 11月 9, 2021
- Updated on 11月 9, 2021
- 6695 Views
This feature allows configuration of the IS IS CSNP generation interval. The default CSNP interval is 10
- Written by Sarah Chen
- Posted on 1月 12, 2022
- Updated on 10月 30, 2023
- 10373 Views
IS-IS flexible algorithm (FlexAlgo) provides a lightweight, simplified mechanism for performing basic traffic engineering functions within a single IS-IS area. FlexAlgo requires the cooperation of all nodes within the IS-IS area but does not require an external controller. Paths are computed by each node within the area, resulting in an MPLS switched forwarding path to nodes that are advertising a node Segment Identifier (SID) for the algorithm. The results of the path computation are placed in the colored tunnel RIB or system tunnel RIB, which simplifies route resolution.
- Written by Tanushree Bansal
- Posted on 6月 21, 2021
- Updated on 10月 27, 2021
- 6679 Views
This feature provides support for multiple IS IS instances in the default VRF. Multiple IS IS instances are only
- Written by Marc Laprade
- Posted on 11月 3, 2021
- Updated on 6月 13, 2023
- 10318 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.
- Written by Prakrati Vidyarthi
- Posted on 8月 16, 2018
- Updated on 11月 5, 2024
- 15444 Views
Normally, a switch traps L2 protocol frames to the CPU. However, certain use-cases may require these frames to be forwarded or dropped. And in cases where the L2 protocol frames are forwarded (eg: Pseudowire), we may require the frames to be trapped to the CPU or dropped. The L2 Protocol Forwarding feature provides a mechanism to control the behavior of L2 protocol frames received on a port or subinterface.
- Written by Xin Guang (Tony) Du
- Posted on 8月 25, 2016
- Updated on 11月 23, 2020
- 10528 Views
The LDP pseudowire feature provides support for emulating Ethernet connections over a Multiprotocol Label
- Written by Andrew Li
- Posted on 11月 11, 2021
- Updated on 12月 28, 2021
- 7857 Views
Egress Peer Engineering (EPE) using BGP LU enables traffic engineering of the links between Autonomous Systems
- Written by Weichen Zhao
- Posted on 5月 12, 2022
- Updated on 5月 13, 2022
- 6929 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, the ability to encapsulate MPLS over GUE packets of variant 1 header format has been added.
- Written by Binoshmon T B
- Posted on 7月 22, 2020
- Updated on 6月 27, 2022
- 12102 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 Swati Patel
- Posted on 10月 27, 2021
- Updated on 9月 4, 2024
- 18195 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 Freedom Garcia
- Posted on 11月 5, 2021
- Updated on 8月 30, 2024
- 7505 Views
Non default VRF support is now available for Static unicast NAT. Twice NAT. Dynamic NAT. VRF support
- Written by Midul Jacob
- Posted on 1月 12, 2022
- Updated on 1月 12, 2022
- 7135 Views
A Link Aggregation Group (LAG) is used to aggregate/gather together multiple physical links into a single logical
- Written by Shubham Jangid
- Posted on 11月 9, 2021
- Updated on 10月 8, 2024
- 7048 Views
Policing is typically done on the L2 packet size - that is, the size on the wire, excluding the Preamble, Start Frame Delimiter (SFD), and Interpacket Gap (IPG). To ensure that the policer polices the right amount of L2 packet size, a default packet size adjustment is configured, which is deducted from the size seen on wire. The default packet size adjustment corrects the size observed for every traffic type, except for L3 traffic on DCS-7280R, DCS-7280R2, DCS-7500R, and DCS-7500R2 series (see Description part for details).
- Written by Padmanabh Ratnakar
- Posted on 4月 20, 2021
- Updated on 7月 15, 2024
- 13758 Views
The postcard telemetry (GreenT - GRE Encapsulated Telemetry) feature is used to gather per flow telemetry information like path and per hop latency. For network monitoring and troubleshooting flow related issues, it is desirable to know the path, latency and congestion information for flows at different times.
- Written by Eudean Sun
- Posted on 8月 28, 2019
- Updated on 11月 3, 2021
- 7593 Views
Power over Ethernet (PoE) is a way of delivering power and data over the same Ethernet wires. There have been multiple
- Written by Ryan Lui
- Posted on 10月 20, 2021
- Updated on 10月 20, 2021
- 7296 Views
This brief TOI describes a small update made to Arista’s implementation of the Best Master Clock Algorithm (BMCA),
- Written by Harshit Jain
- Posted on 1月 11, 2022
- Updated on 1月 11, 2022
- 8324 Views
RADIUS protocol specifies the existence of Dynamic Authorization messages which provides a mechanism to change the
- Written by Saurav Arora
- Posted on 1月 7, 2022
- Updated on 1月 7, 2022
- 7081 Views
Traffic steering enables traffic for a specified set of prefixes to get forwarded along traffic engineered paths
- Written by Martin Stigge
- Posted on 9月 16, 2020
- Updated on 1月 11, 2022
- 9244 Views
RSVP TE, the Resource Reservation Protocol (RSVP) for Traffic Engineering (TE), is used to distribute MPLS labels
- Written by Manoharan Sundaramoorthy
- Posted on 9月 4, 2018
- Updated on 2月 5, 2022
- 13403 Views
Segment Routing Traffic Engineering Policy (SR TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend
- Written by Joel Katticaran
- Posted on 9月 1, 2021
- Updated on 11月 10, 2021
- 7028 Views
This feature extends the existing functionality to set explicit next hop addresses for vpn ipv4 and vpn ipv6 routes.
- Written by Rehmanali Jiwani
- Posted on 1月 6, 2022
- Updated on 1月 6, 2022
- 6603 Views
The sFlow source IP address (also known as the agent IP address) is placed in the sFlow datagrams that the switch sends
- Written by Thejesh Panchappa
- Posted on 5月 1, 2015
- Updated on 5月 13, 2024
- 8033 Views
This is an infrastructure that provides management of SSL certificates, keys and profiles. SSL/TLS is an application-layer protocol that provides secure transport between client and server through a combination of authentication, encryption and data integrity. SSL/TLS uses certificates and private-public key pairs to provide this security.
- Written by Bruno Perriot
- Posted on 7月 13, 2018
- Updated on 11月 7, 2021
- 6977 Views
Stateful switchover is a redundancy mode available on systems with 2 supervisor cards. One supervisor card is active
- Written by Tanuj Kumar Jhamb
- Posted on 10月 21, 2021
- Updated on 10月 26, 2021
- 7664 Views
Support for matching of DSCP / ECN is available under the QOS class map configuration on Arista switches.
- Written by Anubhav Choudhary
- Posted on 11月 24, 2021
- Updated on 11月 24, 2021
- 5935 Views
In Dynamic Path Selection (DPS), it takes a fixed 5 seconds in order to detect failure in the path as the underlying
- Written by Josh Pfosi
- Posted on 6月 11, 2019
- Updated on 11月 11, 2024
- 12209 Views
This feature adds support for CPU traffic policy capable of matching and acting on IP traffic which would otherwise
- Written by Rajiv Patil
- Posted on 9月 16, 2020
- Updated on 8月 30, 2024
- 15275 Views
Dynamic NAT is a feature which dynamically allocates an IP address to an incoming or outgoing flow. This address will replace source or destination IP for all packets of the flow.
- Written by Binglai Niu
- Posted on 10月 21, 2021
- Updated on 10月 21, 2021
- 7357 Views
Nexthop groups is a routing mechanism where users can configure a set of nexthops by specifying their nexthop
- Written by Harsh Goyal
- Posted on 12月 21, 2020
- Updated on 2月 15, 2024
- 7974 Views
IPv4 Unicast Reverse Path Forwarding (uRPF) can help limit malicious IPv4 traffic on a network. uRPF works by enabling the router to verify reachability (routing) of the source IP address (SIP) in the packet being forwarded. If the SIP is determined to not be a valid address, the packet is dropped.
- Written by Legena P K
- Posted on 8月 21, 2020
- Updated on 5月 31, 2024
- 7221 Views
IPv6 Unicast Reverse Path Forwarding (uRPF) can help limit malicious IPv6 traffic on a network. uRPF works by
- Written by Bidong Chen
- Posted on 9月 7, 2021
- Updated on 12月 2, 2024
- 9108 Views
This feature extends the capabilities of Tap Aggregation traffic steering to allow for using interface traffic policies. Initially, interface traffic policies only allowed packet drop, count, qos (set traffic class, set dscp) and log actions.