EOS 4.35.2F TOI

RDMA over converged ethernet version 2 (RoCEv2) is a UDP protocol for transferring memory blocks between compute nodes. It is used for AI applications. RoCEv2 aware sampled flow tracking with IPFIX export is an enhancement that allows customers access to RoCEv2 flow information, for the purposes of analyzing and monitoring traffic associated with AI workloads.

EOS 4.35.2F introduces support to configure tag at interface level configuration to add a route tag attribute for connected routes. These tags are optionally configured per address.This feature adds the ability to define tags for local/directly connected prefixes as part of ‘ip address’ command. These tags can then be used in a RCF function or route-map for policy decision and route filtering as opposed to maintaining prefix-list when redistributing routes between protocols.

Routing control functions (RCF) is a language that can be used to express route filtering and attribute modification logic in a powerful and programmatic fashion.This document serves as a reference guide for Routing protocol attributes, Operators for comparing and modifying attributes, built-in functions provided in RCF

Routing control functions (RCF) is a language that can be used to express route filtering and attribute modification logic in a powerful and programmatic fashion.This document serves as a reference guide for Bgp agent points of application:

Routing control functions (RCF) is a language that can be used to express route filtering and attribute modification logic in a powerful and programmatic fashion.

Segment Routing Traffic Engineering Policy (SR-TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend to steer traffic along any path without maintaining per flow state in every node. A headend steers traffic into an SR Policy.

Storm Control is a flood containment mechanism that limits BUM (broadcast, unknown-unicast, and multicast) traffic. This feature introduces policing BUM traffic via a single policer per interface instead of having independent policers for each of the stream - broadcast, unknown-unicast, multicast.

Storm control is a feature that allows the data plane to drop excess broadcast, unknown unicast, and/or multicast packets if the ingress packet rate exceeds a user-configurable threshold.

Linear pluggable optics (LPO) represent a significant advancement in transceiver technology. These modules are designed to reduce costs, power consumption, and latency compared to traditional Digital Signal Processing (DSP) based transceivers.

ARP and IPv6 Neighbor Discovery use a neighbor cache to store neighbor address resolutions. The cache maintains the resolutions for an interval of time after which a refresh process begins.  During the refresh process, a number of ARP requests or IPv6 ND Neighbor Solicitations are sent to the neighbor until the neighbor either responds with an ARP reply or IPv6 ND Neighbor Advertisement.

Port isolation is a feature that segregates the ports in a VLAN broadcast domain into isolated and non-isolated ports and facilitates blocking traffic between ports marked as isolated. Isolated ports in a VLAN are the ports that cannot send/receive traffic from other isolated ports in the same VLAN. However, they should still be able to communicate with non-isolated ports

This feature adds support for configuring an interface as a TX mirror source and a source for egress sFlow at the same time. For more information about mirroring and egress sFlow see the Resources section below.

In Segment Routing, Adjacency Segment (Adj-SID) directs a node to forward the packet over a specific link or a set of links to the remote node. This feature adds support for statically configured SRv6 Adj-SIDs using micro-SIDs, also referred to as uA. This feature builds on the base SRv6 support described in SRv6 uN Support TOI.

Access Control Lists (ACL) use packet classification to mark certain packets going through the packet processor pipeline and then take configured action against them. Rules are defined based on various fields of packets and usually TCAM is used to match packets to rules. For example, there can be a rule to match the packet source IP address against a list of IP addresses, and drop the packet if there is a match. This will be expressed in TCAM with multiple entries matching the list of IP addresses. The number of entries is reduced by masking off bits, if possible. TCAM is a limited resource, so with classifiers having a large number of rules and a big field list, TCAM runs out of resources.

This TOI supplements the Ingress Traffic Policy applied on ingress interfaces. Please refer to that document for a description of Traffic Policies and field-sets. This TOI explains the Traffic Policies as applied in the egress direction on interfaces.

SWitch Aggregation Group (SWAG) is a feature in EOS that supports combining multiple physical switches into a single, powerful virtual switch, simplifying network management and increasing scalability. This document describes how to configure and troubleshoot a SWAG.

SwitchApp is an FPGA-based feature available on Arista’s 7130LB-Series and 7132LB-Series platforms. It performs ultra low latency Ethernet packet switching. Its packet switching feature set, port count, and port to port latency are a function of the selected SwitchApp profile. Detailed latency measurements are available in the user guide on the Arista Support site.

Extra MPLS Pop is an extension to TAP Aggregation that allows 4 to 6 MPLS labels to be removed from a packet, compared to the previous limit of 1 to 3 labels. Popping 4 to 6 MPLS labels works for all packet types where popping 1 to 3 MPLS labels is supported and,

Temporal Tail Drop Thresholds enables the configuration of interface TX queue tail drops thresholds in units of time. The system dynamically computes the maximum allowable queue occupancy by considering the current interface speed and the Weighted Round Robin (WRR) bandwidth allocation. This feature simplifies configuration in environments with mixed link speeds. The calculated threshold represents the maximum bytes queued to hold packets for the specified duration.

The Unified Forwarding Table (UFT) is a group of memories that is shared between Layer2 and Layer3 lookup tables with capabilities for variable partitions. Rather than separate Layer2 and Layer3 lookup tables of fixed size, the UFT may be partitioned to support user-requested combinations of Layer2 and Layer3 lookup tables of varying sizes. The new UFT partitioning CLI has capabilities to reconfigure individual forwarding table scales (Layer2, Layer3 Unicast, Layer3 Multicast) according to the user’s input. The CLI provides an interface for granular control of the underlying UFT resources.

This article describes how to customize TCAM ( Ternary Content Addressable Memory ) lookup for each feature which uses TCAM.

The VLAN mapping or translation feature provides the ability to map an arbitrary VLAN tag to a particular bridging VLAN on the switch. This mapping can be either bidirectional or applied only in one direction (incoming/outgoing). The mapping is applied on a trunk port and multiple mappings can co-exist under each trunk port.

This feature allows the VRRP MAC and IP to be advertised via EVPN MAC-IP routes when VRRP is configured on the VTEP.

Support for matching of DSCP,ECN,VLAN is available under the QOS class-map configuration on Arista switches.

The ZTX Session Table Archive feature provides local storage of historical session data on the appliance's SSD, enabling local forensic analysis and troubleshooting. This capability is essential for investigating security incidents, meeting compliance requirements, and analyzing traffic patterns that occurred hours or days in the past.