This read-only Counter64 reports the receive byte rate for this PM instance, sampled per second rather than accumulated over the whole bin. Because it is a rate rather than a running total, it is the field an admin actually watches on a live dashboard to catch a bandwidth spike the moment it happens, without waiting for the bin to close; because it is drawn from this table's currently-accumulating, short-interval bin, it reflects only the last few minutes of activity, so it's the value to watch for a fast-forming problem rather than a long-term trend. On EVC 212 (E-LAN) on a metro access ring, a live reading of 200,856,752 bytes/sec against a 1,000,000,000-bps port tells an admin roughly how close to full the link is running right now.