Tag :: TOI

An IPv6 link local address for an interface is generated automatically using the modified EUI 64 scheme. All IPv6

A DMF interface used by a DMF policy as both a filter and a delivery interface is known as a filter-and-delivery interface. Filter-and-delivery interfaces now support configuring sFlow in the DMF Controller.

Configurable TPID enables TPID to be configured per switchport (default TPID on switchport is 0x8100) on

On 7280R/R2, "Configurable TPID" enables a TPID to be configured per switchport (default TPID on switchport is 0x8100). A packet is considered tagged (both from ingress and egress point of view) on an interface if and only if TPID of the outermost VLAN tag on the packet matches the TPID configured on the interface.  Up to 3 distinct (non-default) TPID values may be recognized per chip.

Transmit queues are logical partitions of an Ethernet port’s egress bandwidth. Data streams are assigned to queues based on their traffic class, then sent as scheduled by port and transmit settings. Sand platform switches have eight queues, 0 through 7, and all queues are exposed through the CLI. However, queue 7 is not user-configurable. Queue 7 is always mapped to traffic class 7, which is reserved for control plane traffic. This feature allows tx-queue 7 to be configurable. As of 4.33.0F, a limited set of features are configurable on tx-queue 7.

Antenna gain measures an antenna's effectiveness in sending and receiving signals. It doesn’t amplify the total radio signal strength but redistributes the signal in the desired direction to maximize signal coverage, reduce interference, and enhance network performance.

CV-CUE utilizes several external cloud-hosted services to enable key features, including AFC, Ekahau integration, Webhooks, and Arista Firmware Repositories. In a standard on-premises deployment, CV-CUE often resides within a restricted network with no direct access to the Internet. To use and leverage the cloud-dependent features while maintaining security policies, CV-CUE supports the proxy server configuration. This service allows CV-CUE to communicate with specific external services via a customer-managed proxy server

MACsec operates as a global fabric configuration, encrypting traffic between core switches while excluding ancillary traffic, such as tap-to-filter or tool delivery. This feature introduces configurable MACsec path requirements, enabling the formation of multi-DC fabrics where inter-DC communication utilizes encrypted MACsec links while intra-DC traffic remains unencrypted.

Arista Access Points (AP) support configuring the Maximum Transmission Unit (MTU) to send large packets without fragmentation. The default MTU is 1500 bytes.

Connectivity Monitor is an EOS feature that allows users to monitor their network resources from their Arista switches. The resources being monitored may or may not be Arista devices. Connectivity monitoring is unidirectional in nature.

This feature is an extension to the Explicit Congestion Notification (ECN) functionality for non ECN Capable

With the 12.0 release, CloudVision Cognitive Unified Edge (CV-CUE) introduces the capability to copy policies from one Wireless Manager server and reuse it in another server.

The Flexible Encapsulation (FlexEncap) feature is used in conjunction with pseudowire, L2, and L3 subinterfaces to match on incoming VLAN tags and retain and/or rewrite them on egress. In the case where VLAN tags are swapped or pushed, the class of service (CoS) field of any new VLAN tag is set based on the configured traffic-class to CoS mapping. That is, based on the traffic class the incoming packet traversed through, the CoS of all VLAN tags of the outgoing packet is determined by the result of the traffic-class to CoS map.

With the 16.0 release, network administrators do not have to define the VLANs received from the RADIUS server or CoA servers. The RADIUS server can dynamically generate VLANS for clients and send the VLAN to the access point (AP) when the client connects. This eliminates the need to manually configure all the dynamic VLANS in the SSID and Device settings. When Dynamic VLAN is enabled, network administrators do not have to configure the VLANs in SSID Settings; they are created dynamically on the AP.

This feature supports configuring more than one L3 delivery interface over the same subnet using the same gateway.

The feature adds cross-VRF support for dynamic prefix-list.

Dynamic prefix-list policy construct is similar to the traditional IP and IPv6 prefix-list, except that they have an additional state associated. This state associated with the dynamic prefix-lists, is determined on the basis of the route entries in FIB, and hence as and when the FIB changes, the state also changes dynamically. This state determines the dynamic prefix-list behavior, when used in route-map/RCF match clauses or route injection.

Until the DMF release 8.9, DMF users had no direct visibility into the current scale against the verified scale across the DMF fabric. This feature exposes the current scale against the verified scale via REST APIs, GUI, and CLI commands. The verified scale represents the capacity tested under reference conditions.

This feature allows the configuration of custom DSCP-to-DSCP maps on a per-Nexthop Group (NHG) basis. When applied it rewrites the DSCP of the outer IP header of IPvX-in-IPvX (X represents both v4 and v6) encapsulated packets using the inner IPvX header’s DSCP value while ensuring the DSCP of the inner IPvX overlay is preserved.

This feature allows the user to define a custom COS To Traffic-Class (TC) and Drop-Precedence (DP) map and apply it to an interface.

This feature allows the user to define a custom COS To Traffic-Class (TC) profile and apply it to an interface.

This feature allows the user to define a custom DSCP-To-TC map and apply it to an interface.

The feature allows to create a custom (i.e. named) TC, DP to DSCP mapping profile that can be applied on an interface.

This feature allows the user to define custom EXP To Traffic-Class (TC) maps that can be associated with individual interfaces to classify packets based on EXP bits (MPLS priority bits) of the outer MPLS header.

This feature allows defining custom TC-To-CoS mapping profiles that can be attached to the interfaces.

With the 15.0 release, access points can authenticate themselves to the network using respective certificates. With access point (AP) VPN, AP uses the EAP-TLS protocol for authentication. Since EAP-TLS requires the client and network to authenticate themselves using respective certificates, the protocol is considered robust compared to exchanging shared secret and Xauth password. 

With the 14.0 release, you can provide a custom name to your system backup file and also rename it. You can back up the entire system or only the configuration files, and restore them when needed.

This document describes how to prefix syslog messages with a custom string value. Previously, syslog messages were constrained to being prefixed with either the device’s hostname, IPv4 address or fully qualified domain name. This can be controlled with the command “logging format hostname ( fqdn | ipv4 )”. Support has now been added for prefixing the syslog messages with a custom comment. This provides users with greater freedom when deciding the format of their syslog messages including those which are sent to syslog servers.

Network Administrators can configure device settings at any location in CV-CUE, and the device configuration attributes get inherited from a parent to a child location. By default, inherited settings share the same attributes as the parent location. With this release, Administrators can override certain attributes of a device configuration at a child location without breaking inheritance, so that the entire device configuration remains unchanged except for the overridden attributes.

Network Administrators can create SSIDs at any location in CV-CUE, and the same SSID can be inherited from a parent to a child location. The inherited SSIDs, by default, share the same attributes as the parent location. With the 18.0 release, Administrators can override certain attributes of SSID at a child location without breaking the inheritance, so that the entire SSID configuration remains the same, except for the overridden attributes.

With the 20.0 release, you can create more custom attributes for SSID settings. This article lists all the enhancements made to this feature in the 20.0 release. To see the list of updates made in the previous release, see the 18.0 TOI.

This feature can be used to customize hardware reported transceiver DOM thresholds to uniformize part-to-part differences in various parameter thresholds.

CVX High Availability (HA) provides CVX Controller redundancy by having multiple CVX controllers running in a

This feature adds support for securing out of band connection between CVX server and CVX clients by SSL/TLS

This feature allows adding third party VTEPs to  a common L2 domain comprising of Arista and non Arista switches

S supports L3 EVPN gateway with Type 5 nexthop-self mechanism. While the nexthop-self mechanism is simple to operate, the L3 gateway lacks the support to rewrite the EVPN route distinguisher as well as the BGP route target. This feature supports an alternative L3 EVPN gateway mechanism using multi-domain L3 VRF instead. A multi-domain IP VRF allows configuring not only the local domain route distinguisher (RD) and route targets (RT), but also the remote domain route distinguisher and route targets on a DCI gateway.

This document describes the configuration and behavior of physical interfaces on the DCS-7060CX5 series switch including:

This document describes the configuration and behavior of physical interfaces on the DCS-7060X6-series switches including: Speed, Forward Error Correction (FEC), FEC histograms, Logical ports, Precoding, Transceiver Online Insertion and Removal (OIR).

Arista’s DCS-7130LBR series of switches are powerful network devices designed for ultra latency applications along with a wealth of networking features.

Arista’s DCS-7130LBR series of switches are powerful network devices designed for ultra low latency applications along with a wealth of networking features.

Arista’s DCS-7135LB series of switches are network devices designed for ultra low-latency applications along with a suite of networking features. It combines the following functionality on a single device

Arista’s DCS-7135V series of switches are network devices designed for ultra low-latency applications along with a suite of networking features.

ACL based QoS marking and policing is supported on DCS 7160 switches. Currently we support IPv4 ACL based QoS via

Stream Control Transmission Protocol (132) is a transport layer protocol, much like TCP. After the IP header, a

Delay based ECN on DCS 7280SE and DCS 7500E adds support for measuring the queueing delay that an IPv4 unicast routed

This feature introduces a configurable delay for flushing the MAC address when the network interface goes down, reducing unnecessary MAC address flushing during transient link failures. By default, when the link goes down MAC addresses associated with the link are flushed immediately. With this feature MAC address flushing is delayed by the configured time when the link goes down and if the link comes up before the configured timer elapses MAC addresses won’t be flushed from the forwarding table and the timer is cancelled. 

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.

IPsec control packets are generally sent out of any of the egress interfaces based on the ECMP IP route that covers the remote IP address of the IPsec connection. This is not suited in some deployments. For example, when an IPsec end device is establishing connections with another device across more than one ISP (Internet Service Provider) and the control packets may get different NAT treatment based on which ISP they are going over.

This feature detects duplicate IP addresses configured on the switch already owned by hosts the switch has already learned. When the duplicate IP address is detected, a syslog message will be generated. It can help the network operator to identify IP address misconfiguration.

CV-CUE displays the missing VLANs in the network, allowing Network Administrators to diagnose and resolve the issue quickly. Sometimes out-of-the-box Access Points (APs) cannot send and receive traffic through the switchport they are connected to because the Switch doesn’t have the same VLAN as the AP. This issue could be time-consuming to diagnose and identify as Network Administrators follow a series of error elimination steps to determine the root cause. After the administrator identifies the root cause, the fix is trivial; they only need to create the missing VLANs in the Switch network.

The above figure depicts a typical wireless network deployment. In the above deployment, the traffic from wireless networks are encapsulated into VXLAN tunnels by the AP (Access Point) VTEPs and terminated at the aggregation switches. When a host on the wireless network transmits a DHCP request broadcast packet, the AP encapsulates it in a VXLAN tunnel and sends it to the aggregation switch.