This read-only value is a 64-bit counter of received packets shorter than the standard 64-byte Ethernet minimum that were nonetheless received without error. While technically undersized, these packets were error-free, so a persistent count is more of an oddity to note than an active malfunction, distinct from the runt-frame counter. For example, an admin noticing csEthStatsRxShortPktsOk on a port connected to specialized test equipment recognizes that gear may intentionally generate short conformant frames as part of its test suite.