cadp Statistics Uncorrectable HCS Errors

1.3.6.1.4.1.9.9.60.1.1.1.1.12

The Header Checksum (HCS) is a CRC-8 calculation over the first 4 octets of the ATM cell header. The received HCS is verified using the polynomial x^8 + x^2 + x + 1. The coset polynomial x^6 + x^4 + x^2 + 1, is added (modulo 2) to the received HCS octet before comparison with the calculated result. Cells with single bit error in the HCS byte are corrected. Cells with more than one bit error in the HCS byte are uncorrectable. Count of uncorrectable Header Checksum (HCS) errors on this phy.