Time stamping is an important tool for network engineering and performance analysis. EOS-4.21.3F adds support for payload timestamping of all GRE encapsulated mirrored packets at line rate (initially only supported on the 7500R/7280R/7500R2/7280R2 series). A timestamp is taken on ingress and inserted into the GRE encapsulated mirrored packet payload at egress.

MMU Profile CLI allows to reserve buffers in either cells or bytes. This feature eases the configuration as different

In conventional VXLAN deployments, each MLAG pair of switches are represented as a common virtual VTEP.

Modular systems and fixed systems with multi faps by default use fabric egress replication mode. With fabric egress

4.21.3F introduces support for Multicast Traffic in Vxlan Using Underlay in the platforms listed below. The TOI for

The BGP graceful restart mechanism defined in RFC4724 limits the usage of BGP graceful restart to BGP protocol

The OSPF Non Stop Forwarding (NSF) feature adds support for Graceful OSPF Restart (IETF RFC 3623) and Graceful OSPFv3

EOS 4.21.3F adds support for OSPF Non Stop Forwarding in the multi agent routing protocol model.

This feature enables support for SNMP MIB for OSPFv3 in EOS. The feature follows RFC 5643 version 16. The deviations

It has been observed that on Arista products using Alta switching chip from Intel/Fulcrum may experience the CPU Lock

Selective ARP install is the selective programming of remote ARPs in hardware as received through EVPN Type 2 MAC IP

The following QoS features are supported on the vEOS router (DPDK flavor):. The port can be configured

Similar to reconfiguring the traffic class to transmit queue map, the traffic class to priority group mapping can

4.21.3F introduces support for ‘Replace AS Path’ in the multi agent routing protocol model.

RIB Route Control is a collection of mechanisms for controlling how IP routing table entries get used. Next hop

User Defined Fields (UDFs) are Access List (ACL) qualifiers that consist of an offset into a packet and a pattern to

This feature allows for setting BGP path attribute Multi Exit Discriminator for IGP routes advertised by BGP. This

The ‘show interfaces interactions’ command aims to provide users a resource that explains various relationships between ethernet interfaces. It describes interactions in which a configuration on an interface causes another set of interfaces to become inactive or have reduced capabilities.Examples include a primary interface consuming subordinate interfaces to service a four-lane speed or platform restrictions that require four interfaces of a port to operate at the same speed.

The MMU watermark counters report the maximum usage of the MMU queues during a given time window. This feature reports

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.

BGP Large Communities, as defined in RFC8092, is now supported within EOS. Both standard (4 octets) and

The route map feature in BGP allows filtering and manipulating BGP path information. It combines set statements with

4.21.3F release supports reading and streaming various OpenConfig configuration and state models over gNMI (gRPC

The route map subroutine (referred from here on as sub route map) configuration simplifies routing policies by

Symmetric LAG hashing allows the two flows of a bidirectional communication link to be forwarded to the same member of

This article describes the TAP Aggregation 802.1Q (VLAN) tag stripping feature. This feature allows up to two of the outermost incoming 802.1Q tags to be stripped, and can be configured on a traffic steering policy or a tool port.

This feature enables support for hardware accelerated sFlow while running in Tap Aggregation exclusive mode. This

Some monitoring tools have a limited time to receive information from the switch and may break if waiting for a

This feature provides total ingress MPLS packet and byte counters received per interface. DCS

4.21.3F introduces support for the feature on the platforms listed below. The TOI describing the feature support on

User Defined Fields (UDFs) are Access List (ACL) qualifiers that consist of an offset into a packet and a pattern to

RPF Exceptions TOI can be accessed here. 4.21.3F introduces support for this feature on SVIs(Switched

In certain VXLAN deployments with either NSX/Logical Router or EVPN IRB, active nodes hosting a virtual IP address

Configuration of VXLAN overlay using EVPN allows for extension of Layer 2 (L2) or Layer 3 (L3) networks across