This read-only Counter64 counts bytes received on this PM instance that were remarked (color-marked) yellow — out-of-profile traffic that exceeded its committed rate but was still within the excess-rate allowance. A rising Yellow count is usually the first sign a customer or internal flow is bursting above its committed rate (CIR) into the excess-rate (EIR) band — traffic that forwards fine until congestion hits, at which point yellow-marked frames are the first ones a downstream queue will drop; because it is drawn from the current, still-open 24-hour bin for today, the number keeps climbing until midnight rollover, so it should be read as "so far today" rather than a finished daily total. On a 1 Gbps UNI feeding a business Ethernet Private Line, this might read 1,270,000 bytes over today so far — a number an admin would divide by the bin length to sanity-check it against the port's 1,000,000,000-bps ceiling.