Small changes have been made in three areas:
Various hardware-specific ethernet drivers.
The generic ethernet device driver.
The OpenBSD TCP/IP networking package.
These changes were made in order to export information about the driver and +the network that the SNMP agent must report. The changes were trivial in +the case of the network stack, since it was already SNMP-friendly. The +generic ethernet device driver was re-organized to have an extensive header +file and to add a couple of APIs to extract statistics that the +hardware-specific device drivers keep within themselves.
There may be a performance hit for recording that data; disabling +a config option named something like +CYGDBG_DEVS_ETH_xxxx_xxxx_KEEP_STATISTICS +depending on the specific device driver will prevent that.
Not all platform ethernet device drivers export complete SNMP statistical +information; if the exported information is missing, SNMP will report zero +values for such data (in the dot3 MIB).
The interface chipset has an ID which is an OID; not all the latest greatest +devices are listed in the abailable database, so new chipsets may need to +be added to the client MIB, if not defined in those from UCD.