Tag :: EOS 4.24.2F

For a pair of QSFP100 ports grouped together on a gearbox, it is possible to enable a 10G or 25G link on the first primary port while maintaining the usage of the secondary port at any speed. For two QSFP100 ports on a gearbox, the primary port allows for breakout speeds 4x10G and 4x25G, while the secondary does not. The configuration of the primary port determines whether the secondary port can be used since in a full breakout mode such as 4x10G the secondary port is forced inactive.

This document describes the configuration and behavior of physical interfaces on the 7368 series switches and

802.1X is an IEEE standard protocol that prevents unauthorized devices from gaining access to the network.

The following table describes the advanced mirroring features that are currently supported with links to their respective TOIs.

This feature adds support for “Enhanced Route Refresh” capability (RFC7313). An enhanced route refresh is,

The BGP-LS extension allows IGPs (OSPF/IS-IS) link state database information to be injected into BGP. This is typically used in deployments where some external component, (like a controller or Path Computation Engine) can do centralized path computations by learning the entire IGP topology through BGP-LS. The controller can then communicate the computed paths based on the BGP-LS updates to the head end device in the network. The mechanism used by the controller to communicate the computed TE paths is outside the scope of this document. Using BGP-LS instead of an IGP peering with the controller to distribute IGP link state information has the following advantages.

The BGP graceful restart mechanism has a limitation that the graceful restart time cannot exceed 4095 seconds as per

Generic UDP Encapsulation (GUE) is a general method for encapsulating packets of arbitrary IP protocols within a UDP tunnel. GUE provides an extensible header format with optional data. In this release, decap capability of GUE packets of variant 1 header format has been added. This variant allows direct encapsulation using the UDP header without the GUE header. The inner payload could be one of IPv4, IPv6, or MPLS.

Arista switches provide several mirroring features. Filtered mirroring to CPU adds a special destination to the mirroring features that allows the mirrored traffic to be sent to the switch supervisor. The traffic can then be monitored and analyzed locally without the need of a remote port analyzer. Use case of this feature is for debugging and troubleshooting purposes.

An OSPF router can attract all traffic towards itself from within the OSPF network, by advertising a default route. Often it is desirable to advertise this default route conditionally, for instance, only when there is a connection to an upstream router or when a default route is learnt through other protocols like BGP. OSPF conditional default-originate provides the above functionality.

Route Cache is a feature where users can configure Static EVPN VXLAN routes beyond the hardware capacity. The

This article describes the support for Filtered Mirroring using security ACL. The user can selectively mirror packets based on the statement in the configured IPv4, IPv6 or MAC ACL.

This feature adds support for “Dynamic Load Balancing (DLB)” on Equal Cost Multi Path (ECMP) groups.
It is intended to help overcome the potential shortcomings of traditional hash-based load balancing by considering the traffic load of members of ECMP groups. DLB considers the state of the port while assigning egress ports to packets, resulting in a more even flow. The state of each port member is determined by measuring the amount of data transmitted from a given port and total number of packets enqueued to a given port.

Dynamic NAT is a feature which dynamically allocates an IP address to an incoming or outgoing flow. This address will replace source or destination IP for all packets of the flow.

IPv6 Unicast Reverse Path Forwarding (uRPF) can help limit malicious IPv6  traffic on a network. uRPF works by

This feature adds support for a selected set of configured interfaces to collect egress flow samples. Egress sFlow can be configured on Ethernet and Port-Channel interfaces, and on subinterfaces on select platforms. Hardware acceleration is not currently supported for egress sFlow and all sample processing is performed in software.

Unidirectional links is a feature that configures an Ethernet interface transmit and receive paths to be independent. Specifically, the transmit path can be up or down independent of the receive path being up or down.