Tag :: TOI

CloudVision allows users to maintain multiple login sessions simultaneously. However, to prevent account sharing, administrators can now limit the number of active login sessions a user can have and terminate a user’s open sessions if that have reached their limit and are unable to log in.

Config checkpoint mechanism provides a shortcut to copy the current running config into a file stored in checkpoint

The Commit Timer mechanism provides a way to automatically rollback changes done by a config session, unless

In EOS 4.15.0F release, we have introduced the configuration sessions feature. Configuration sessions allow the

Under config router bgp mode, the following is the format for configuring remote port for a peer or peer grou

Currently when programming ECMP routes only one path is programmed in the kernel. There exists an environment variable (KERNELFIB_PROGRAM_ALL_ECMP) that allows users to program all paths from an ECMP route in the kernel. However, setting the variable requires restarting the KernelFib agent. This restart then reprograms all the routes.

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

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.

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.

A new Connectivity Monitor panel allows users to easily view the health of device connections in Dashboards. The Connectivity Monitor panel displays EOS probes, categorizes connections as either Healthy or Unhealthy, and identifies the number of devices involved. By clicking on an Unhealthy connection, you can view the Connectivity Monitor events related to the connection.

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.

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 allows the user to define a custom DSCP-To-TC map and apply it to an interface. The custom DSCP-To-TC map would only be applicable when the interface is in DSCP trust mode. This feature allows the user to classify packets based on DSCP bits of the IP header. The exact mapping can be specified using a custom DSCP-To-TC map.

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.

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.

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

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-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

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.

CloudVision Portal release 2017.2.0 introduces support for the network wide Telemetry framework consisting of the

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.

CloudVision allows users to monitor a device’s environment by displaying graphs for temperature, power supply and fan speed. Power Supply shows the power used at each power socket on the device. Previously users could only view a visualization of output power. A visualization for input power is now available to view.

With the 12.0 release, you can configure DHCP fingerprinting to allow or deny clients getting connected to an SSID. Using DHCP fingerprinting, you can identify the operating system (OS) of the client based on the DHCP exchange packets between the client and the DHCP server. 

Dynamic Host Configuration Protocol (DHCP) is a feature which can be used to provide an IP address to the interfaces on

DHCP Relay feature forwards DHCP packets between client and server when the DHCP Server is not in the same broadcast domain as the client. DHCP Relay should be configured on the gateway interface (SVI/ L3 interface ) for the clients.

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

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.