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66 Chapter 6 Setting Network Preferences
Viewing Port Names and Hardware Addresses
To list all port names with their Ethernet (MAC) addresses:
$ sudo networksetup -listallhardwareports
To list hardware port information by port configuration:
$ sudo networksetup -listallnetworkservices
An asterisk (*) in the results marks an inactive configuration.
To view the default (en0) Ethernet (MAC) address of the server:
$ serversetup -getMacAddress
To view the Ethernet (MAC) address of a port:
$ sudo networksetup -getmacaddress (
devicename
|"
portname
")
To scan for new hardware ports:
$ sudo networksetup -detectnewhardware
This command checks the computer for new network hardware and creates a default
configuration for each new port.
Viewing or Changing MTU Values
All data transmitted over a network travels in data packets. The size of a packet is called
a maximum transmission unit (MTU), which if too large or too small will affect
performance. To change the MTU size for a port, use the networksetup tool.
To view the MTU value for a hardware port:
$ sudo networksetup -getMTU (
devicename
|"
portname
")
To list valid MTU values for a hardware port:
$ sudo networksetup -listvalidMTUrange (
devicename
|"
portname
")
To change the MTU value for a hardware port:
$ sudo networksetup -setMTU (
devicename
|"
portname
")
Viewing or Changing Media Settings
To view media settings for a port:
$ sudo networksetup -getMedia (
devicename
|"
portname
")
To list valid media settings for a port:
$ sudo networksetup -listValidMedia (
devicename
|"
portname
")
To change media settings for a port:
$ sudo networksetup -setMedia (
devicename
|"
portname
") subtype [option1]
[option2] [...]
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