sFlow is a sampling technique which monitors incoming traffic on all interfaces without affecting network performance. Egress sFlow is a feature which samples the packets in the egress pipeline for analytical purposes. Currently egress sFlow is only software based on Arista switches.

sFlow is a sampling technique which monitors the incoming traffic on all the interfaces without affecting the network performance.

With the use of MAC ACL configuration, match on ethertype can be programmed under QoS class-map configuration which will help customers to classify the control traffic based on ethertype (e.g. PPPoE discovery (0x8863) / session (0x8864) stage ) along with match on sub protocol (LCP/IPCP/PAP/CHAP) which is present in the payload.

The flow-label match for QoS policy map can be achieved by using the TCAM profile “qos-match-ipv6-flow-label” which is available from EOS 4.27.2F onwards. 

This feature allows the user to match the 20 bit IPV6 flow label using the Qos Policy Map and allows to classify the flow-label controlled traffic.

This feature allows the user to configure upto 1023 unique QoS Policy-maps per chip.

Support for matching of DSCP / ECN is available under the QOS class map configuration on Arista switches.