The IPConfiguration agent implements the client side of the DHCP and BOOTP protocols described in RFC951, RFC1542, RFC2131, and RFC2132. The IPConfiguration agent is a program bundle that is loaded and executed by the configd(8) process. The IPConfiguration agent is responsible for configuring and managing the IP addresses on direct, connectionless interfaces such as IEEE 802.3 Ethernet and IEEE 1394 FireWire. Public API's in the SystemConfiguration framework are currently the only supported way to access and control the state of IPConfiguration. Using it for any other purpose is strongly discouraged. It should only be used in a test and debug context. interface naming conventions started in BSD were retained in OS X / macOS, and now there also additions.Īlso answered in part on Apple SE here and there.Ipconfig is a utility that communicates with the IPConfiguration agent to retrieve and set IP configuration parameters.use netstat -nr to see how traffic is currently routed via network devices according to destination.many VPNs will add additional devices, often 'utun#' or 'utap#' following TUN/TAP (元/L2) virtual networking devices.the 'Network' panel in System Preferences to see what network devices 'exist' or 'can exist' with current configuration.Either as an old version, or virtual interface with different semantics than awdl. Gif0 is a more generic tunneling interface -to. Stf0 is an IPv6 to IPv4 tunnel interface to support the transition from IPv4 to the IPv6 standard. In arbitrary order of my familarity / widespread relevance:Įn0 at one point 'ethernet', now is WiFi (and I have no idea what extra en1 or en2 are used for). Gim-yeongdeog-ui-MacBook-Air:~ KimYoungDirk$ Ifmaxaddr 0 port 5 priority 0 path cost 0 Root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0 Maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200 Id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0 Inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 Gim-yeongdeog-ui-MacBook-Air:~ KimYoungDirk$ ifconfig Can anyone briefly tell me what they are? What are lo0, gif0, en0, and so on? When I type ifconfig on my Mac terminal, several information is printed.

Ifconfig display for mac