Tag :: EOS 4.29.2F

A L2 sub-interface is a logical bridging endpoint associated with traffic on an interface distinguished by 802.1Q tags, where each <interface, 802.1Q tag> tuple is treated as a first-class bridging interface. 

This feature terminates GRE packets on a TapAgg switch by stripping the GRE header and then letting the decapped packets go through the normal TapAgg path. With this feature, we can use an L3 GRE tunnel to transit tapped traffic to the TapAgg switch over an L3 network. That would widely extend the available use cases for TapAgg.

Access Control Lists (ACL) use packet classification to mark certain packets going through the packet processor pipeline and then take configured action against them. Rules are defined based on various fields of packets and usually TCAM is used to match packets to rules. For example, there can be a rule to match the packet source IP address against a list of IP addresses, and drop the packet if there is a match. This will be expressed in TCAM with multiple entries matching the list of IP addresses. Number of entries is reduced by masking off bits, if possible. TCAM is a limited resource, so with classifiers having a large number of rules and a big field list, TCAM runs out of resources.

The MPLS LFIB counters feature was enhanced to add support for counting labels that correspond to VRF termination labels. The full details of the MPLS LFIB counters feature can be found in the original

This feature introduces a flag to indicate to a gNMI client that the FIB (forwarding information base) or IPv4/IPv6 unicast AFT (abstract forwarding table) have converged and the snapshot is consistent with the device.

This feature allows the export of IP FIB (Forwarding Information Base) through the OpenConfig AFT YANG models.

SwitchApp is an FPGA-based feature available on Arista’s 7130LB-Series and 7132LB-Series platforms. It performs ultra low latency Ethernet packet switching. Its packet switching feature set, port count, and port to port latency are a function of the selected SwitchApp profile. Detailed latency measurements are available in the userguide on the Arista Support site.

Synchronous Ethernet (SyncE) provides support for frequency synchronization over Ethernet between devices traceable to an external frequency reference, like a primary reference clock, as specified in ITU G.8261.

Support for independently editing packets copied to multiple tool interfaces.

A Tap Aggregation steering policy can redirect and replicate incoming traffic streams, as well as apply various packet editing actions, e.g., VLAN identity tagging, MAC address rewrite, timestamping, header removal, etc.

This article describes a set of CLI commands to create TCAM profiles. The profile is composed of a set of TCAM features, with each feature having customized lookup key, actions and packet types to hit.

Virtual Private LAN Service (VPLS) appears in (almost) all respects as an Ethernet type service to customers of a Service Provider (SP). A VPLS glues together several individual LANs across a packet switched network to appear and function as a single bridged LAN. This is accomplished by incorporating MAC address learning, flooding, and forwarding functions in the context of pseudowires that connect these individual LANs across the packet switched network. LDP signaling is used for the setup and teardown of the mesh of pseudowires that constitute a given VPLS instance.

This article describes the support of a VLAN filter for IP, IPV6 and MAC ACLs on the ingress ports. The users will be able to filter the packets by specifying a VLAN id in the ACL rule. VLAN id specified in the ACL rule is internal broadcast domain VLAN id.