CNMAC(4) Device Drivers Manual (octeon) CNMAC(4)

cnmacCavium OCTEON built-in Ethernet device

cnmac* at octgmx?

The cnmac driver supports built-in Ethernet ports on Cavium OCTEON CN30xx, Cavium OCTEON Plus CN50xx, Cavium OCTEON II CN61xx, and Cavium OCTEON III CN71xx system on chips. Among the routers based on these chips are the following:

  • D-Link DSR-500
  • Netgear ProSecure UTM25
  • Portwell CAM-0100
  • Rhino Labs Inc. SDNA Shasta
  • Rhino Labs Inc. SDNA-7130
  • Ubiquiti Networks EdgeRouter
  • Ubiquiti Networks EdgeRouter 4
  • Ubiquiti Networks EdgeRouter 6
  • Ubiquiti Networks EdgeRouter LITE
  • Ubiquiti Networks EdgeRouter PoE
  • Ubiquiti Networks EdgeRouter PRO
  • Ubiquiti Networks UniFi Security Gateway
  • Ubiquiti Networks UniFi Security Gateway PRO-4

The cnmac driver supports TCP/UDP checksum offload on IPv4/IPv6 reception and transmission, and IPv4 checksum offload on reception. The driver additionally supports jumbo frames.

arp(4), ifmedia(4), intro(4), netintro(4), octgmx(4), hostname.if(5), ifconfig(8)

The cnmac driver first appeared in OpenBSD 5.4.

The cnmac driver was written by Internet Initiative Japan Inc.

February 6, 2021 OpenBSD 7.5