ErrorFrames is a read-only Gauge32 giving the percentage of this IP host's total frame count that had hardware or software errors, stored as the real percentage multiplied by 1000 per the MIB's scaling convention. Unlike the paired ild table, this isd table reports only the error-rate figure without an accompanying utilization gauge, so an admin uses it specifically to watch error severity for a host in isolation from how busy that host's link is. A raw value of 2000 for host 10.4.12.30 in this table (2% of frames erroring) tells an admin that host's traffic quality is degrading, independent of whether that host happens to be lightly or heavily loaded at the time.