Tag :: TOI

The EOS DHCP relay agent now supports forwarding of DHCP requests to DHCP servers located in a different VRF to the DHCP

DHCPv6 Prefix Delegation support enables a DHCP relay agent to program routes for addresses assigned by a DHCP server. The assigned prefixes could either be DHCPv6 IA_PD prefix delegation addresses, or DHCPv6 IA_NA global /128 addresses.

Directed broadcast is method of transfer to send a packet to recipients in a target subnet. This is done by sending a

DirectFlow runs alongside the existing layer 2/3 forwarding plane, enabling a network architecture that

The following new enhancements to DirectFlow and/or OpenFlow are added in EOS 4.15.0F:. DirectFlow

IEEE802.1D 2004, Section 7.12.6 specifies destination MAC addresses that are normally trapped (not forwarded) by

The Switch detail page in the DMF GUI has a new Inventory tab displaying information about optics, cables, and transceivers.

This document describes the updates to the DANZ Monitoring Fabric (DMF) 8.7 release verified scale and performance numbers.

The hardware support update details newly supported hardware and other changes in the DANZ Monitoring Fabric (DMF) release 8.7.0.

Egress Filtering is an option to send different traffic to each tool attached to the policy's delivery setting. It provides additional filtering at the delivery ports based on the egress filtering rules specified at the interface.

As of DMF version 8.7.0, all DMF appliances will operate on the AlmaLinux 9.4 operating system, replacing the previous Ubuntu 20.04 LTS. This migration of the underlying operating system will not impact any currently supported features.

The DMF Recorder Node now supports deployment as a Virtual Machine (VM) for functional testing in Proof of Concept (POC) environments. Performance is limited and will vary based on allocated VM resources. DMF 8.7.0 and later Recorder Node images support being deployed as a VM.

This feature provides a method to rename a DMF object. DMF 8.7 Controllers support the Policy rename feature.

The DANZ Monitoring Fabric (DMF) allows the integration and monitoring of virtual machines in a VMware NSX fabric deployed in a vSphere environment. The DMF Controller communicates with NSX to retrieve its managed inventory and configures port mirroring sessions for selected virtual machines managed by the NSX fabric.

With this feature, user can fetch various internal hardware drops info from each switch and isolate the switch or

Precision Time Protocol (PTP) management messages are general PTP messages sent to PTP-enabled switches on the data plane. On Arista switches, its behavior depends on the configured PTP mode. In Boundary Clock mode, they are handled by the control plane. In Transparent Clock mode, they are forwarded in the data plane. PTP management messages can be sent through the PTP network either in a multicast or unicast fashion (by using ptp forward unicast, see Forwarding Unicast PTP Packets in Boundary Mode).

DCS 7280E. Arad QOS MAP:. This command assigns the DSCP rewrite value of 37 to traffic classes 2, 4, and 6.

Dual Tag VLAN mapping feature defines mapping between (outer VID and inner VID of double tagged packet) and bridging

Starting with EOS4.15.0F, dynamic and symmetric LAG hashing policies are supported on the 7500E platform. Dynamic

Dynamic Explicit Congestion Notification (D-ECN) configures an ECN marking threshold that changes dynamically based on a transmit queue’s available shared buffers. A D-ECN offset and D-ECN floor is configured per unicast transmit queue which defines how the ECN marking threshold will change as the queue’s shared buffer limit changes.

Until EOS release 4.32.0F, EOS allows users to statically configure link min-delay and max-delay used for IS-IS FlexAlgo. This feature adds support for dynamic measurement of link delay using the TWAMP Light protocol described in RFC 8186 and provides it to IS-IS FlexAlgo dynamically.

This document describes how to configure and monitor this feature.

Dynamic NAT connection limit is a feature that provides the functionality to limit the number of dynamic NAT connections.

Dynamic resizing of nexthop groups, as the name suggests, is a feature that enables a nexthop group to dynamically

This feature allows eAPI to run in multiple non default VRFs on the same physical router. In this way, users can

ECMP Hash visibility CLI determines the output interface for an ECMP set based on the flow parameters supplied by the user. Ingress interface, source IP address, destination IP address and IP protocol are the required parameters. L4 source and destination ports and VLAN identifier are optional, but should be specified if the packet has them.

This feature provides the capability to count the number of packets hitting rules associated to egress ACLs applied

This feature allows generating the syslog message for the packets matching deny rules in egress ACLs. This can be enabled using the log keyword when configuring a deny ACL rule. A copy of the packet matching such deny ACL rule is sent to the control plane, where a syslog entry for the packet header is generated.

The feature allows to create a named TC to DSCP mapping that can be applied on an interface.DSCP of routed packets egressing out of the interface will be rewritten according to the map.

This feature enables users to configure MPLS EXP rewrite behavior on the egress interface based upon the global TC-to-EXP mapping. Starting from software version 4.33.2F, the CLI configuration to enable or disable EXP rewrite on the egress interface introduces a clear distinction in the behavior of MPLS EXP processing during POP and SWAP operations.

IPv4/IPv6 over MPLS packets are now eligible for ACLs at egress stage by default. The feature is applicable only to

Normally, an ingress router has no control over an autonomous system border router’s (ASBR) selection of inter-AS links. In the example below, Peer 2 and Peer 3 both advertise reachability to some remote network to ASBR 1 (e.g. service route 172.16.1.0/24). ASBR 1 would then use normal bestpath selection rules to select a preferred egress path (for traffic flowing to that service route). However, this means that the ingress router has no control over which egress path is chosen.

This feature optimizes the utilization of hardware resources by sharing tcam entries for a group of SVIs on which an

RadSec or RADIUS over TLS is a protocol for secure communication between a client and the RADIUS server. RadSec uses TCP and TLS protocols to form a secure tunnel between the client and the server.

The BGP implementation now provides the ability to display the age of paths received for a given prefix using the

EOS 4.20.1F introduces expanded VRRP, VARP and MLAG Peer Gateway virtual MAC capabilities on the 7500R, 7280R,

IP in IP decapsulation was first introduced for the supported platforms(below) in EOS version 4.15.0F (IP in IP

DANZ provides a set of features and tools to enhance instrumentation and network/ application performance monitoring with the following key functional areas.

Measured boot is an anti-tamper mechanism. It calculates the cryptographic signatures for software system components and extends the signatures into the Trusted Platform Module (TPM) security chip. Upon startup, with the feature turned on, the Aboot bootloader and EOS calculate the hash of various system components and extend the hashes into the Platform Configuration Registers (PCRs), which is one of the resources of the Trusted Platform Module (TPM) security chip. The calculation and extension event is called the measured boot event, which is associated with a revision number to help the user identify changes to the event.

RFC 5837 describes extensions to the Internet Control Message Protocol (ICMP) that enable network devices to identify incoming and outgoing interfaces and next-hop addresses via extensions to specific ICMP error messages. These extensions are particularly useful for network diagnostics and troubleshooting applications.

EosSdkRpc is an agent built on top of the Arista EOS SDK. It uses gRPC as a mechanism to provide remote access to the EOS SDK. The gRPC interface that EosSdkRpc supports closely matches the interface provided by EOS SDK, and the intent is that the .proto interface can be publicly supported. EosSdkRpc allows for remote access and using protobuf to specify the interface isolates user code from the Linux ABI issues that come with building C++ applications on different compiler, libc, and kernel versions. EosSdkRpc is built using C++ but supports clients written in any of the languages currently supported by the gRPC framework.

This feature prevents policy churn by automatically placing switch interfaces with frequent flapping into an error-disabled state, effectively performing an automatic administrative shutdown. The feature also allows for automatically recovering these interfaces after a specified time. This feature reduces the risk of lost packets caused by continuous recomputation of DANZ Monitoring Fabric (DMF) policies due to flapping interfaces.

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. This mode of operation makes the task of Operations, Administration and Maintenance (OAM) of such networks to be far more challenging, and the ability of service providers to respond to such network faults swiftly directly impacts their competitiveness.

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. 

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. This mode of operation makes the task of Operations, Administration and Maintenance (OAM) of such networks far more challenging, and the ability of service providers to respond to frame loss in such networks directly impacts their competitiveness.

This feature adds support for using the management port on AWE-7220RP-5TH-2S alternately as Ethernet8 port.

The EOS Event Manager feature provides the ability to specify a condition and an action to be carried out when that

The EOS Event Manager feature provides the ability to specify a condition and an action to be carried out when that condition is detected. It is a flexible and configurable way to automate the reaction to conditions without the need for a system operator to observe and apply the desired actions manually.

The EOS Event Manager feature, introduced in 4.17.0F,  provides the ability to specify a condition and an action

The EOS Event Manager feature provides the ability to specify a condition and an action to be carried out when that

Event monitor is extended to support new event types that continuously synchronize their contents with the sqlite database (in contrast with event monitor’s current behavior of synchronizing event state only when cli commands are run.)