Description: Lists the ECN Counter Value per unit as supported. Since different Arista devices have different capabilities for ECN counters, the table would contain the counter information per entity. This includes both packets that were received with congestion marked (ECN bits set) as well as packets that this Arista device marked with ECN bits before transmission. In cases where the platform is unable to count the already marked packets, the counter will only reflect the ones being marked by this specific device on the transmit side.