• Author : Utkarsha Verma


Port-channel Minimum Speed Review and Retry Mechanism

Description Starting from 4.26.10F release, for LACP and static port-channels, EOS will support minimum speed configuration, along with review timer and retry timer. Minimum speed is the total speed of all the interfaces configured in the port-channel which is needed to bring the port-channel link up. If both min-links and minimum speed are configured for a port-channel, minimum speed takes precedence over min-links. Min-links feature is only applicable on the port-channel with all member interfaces having the same speed. Minimum speed feature is applicable for both: port-channel with all member interfaces having same speed; port-channel with member interfaces having different/mixed...
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Hardware Flow Tracking with IPFIX Export and Filter Based Packet Sampling

Description Arista campus switches allow extensive and fine grained hardware based flow tracking and management features. They provide the capability to collect and export flow telemetry to an external observation node (collector), using IPFIX protocol. The below diagram shows how a hardware flow tracking engine can be used to perform flow tracking and flow export in a campus network. It can track flows traversing through the given set of interfaces in a switch and send the collected flow information to a collector. The hardware flow tracking engine allows flow tracking and metering functions on upto 32K concurrent flows. Flows are...
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Port-Channel Min-links Enhancement

Prior to EOS-4.20.5, port-channel min-links feature evaluated minimum-links in the following scenarios: The configuration of min-links on a port-channel interface. When a port-channel is brought up with min-links configuration. Addition or removal of port-channel member interfaces due to configuration or member interface status change. For LACP enabled port-channels, EOS did not re-evaluate min-links on LACP protocol Collecting and/or Distributing state changes. If an interface cannot be programmed as part of the port-channel, it was possible that the port-channel remained link-up with fewer number of active interfaces than the configured min-links. Enhanced min-links support has been introduced in EOS-4.20.5 which addresses...
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Port-Channel member status logging

Port-Channel member status logging on Arista switches allows logging of Ethernet interfaces joining or leaving a Port-Channel. This is enabled by default. It is a global configuration setting applicable to all Port-Channels on the switch. A syslog message is generated whenever an Ethernet interface joins or leaves a Port-Channel. The feature can be used to troubleshoot Port-Channel related issues. This feature has been introduced in 4.17.0F. Configuration Port-Channel member status logging is enabled by default. Logging can be disabled using the following command from global configuration mode: Arista(config)#no logging event port-channel member-status global Logging can be enabled using the following...
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