Description: The second most (middle) significant 32 bits, unsigned 96 bit number in 2**-16 ns, the value is equal to the value of the per-port global variable neighborPropDelay (see 10.2.4.6). It is an estimate of the current one-way propagation time on the link attached to this port, measured as specified for the respective medium (see 11.2.15, 12.5, and E.4). The value is zero for ports attached to IEEE 802.3 EPON links and for the master port of an IEEE 802.11 link, because one-way propagation delay is not measured on the latter and not directly measured on the former. It is recommended that the data type be scaled in ns. The initialization value is zero.

This object MUST be read at the same time as ieee8021AsPortDSNeighborPropDelayHs, and ieee8021AsPortDSNeighborPropDelayLs, which represents most (highest) and least significant 32 bits of values, respectively, in order for the read operation to succeed.