IFConfig	2.07 (15 Apr 2003)
*IFConfig is used to configure internet interfaces.
Syntax: *IfConfig [-ea] <interface> [<address> [<dest_addr>]] [<parameters>]

Switches:
  -e  write error report to Inet$Error.
  -a  list all present interfaces.

Parameters:
  up               Mark an interface up
  down             Mark an interface down
  arp              Enable the use of ARP
  -arp             Disable the use of ARP
  metric <n>       Set the routing metric to <n> (default 0)
  netmask <mask>   Set the interface netmask to <mask>
  broadcast <addr> Set the network broadcast to <addr>
  alias <addr>     Set an additional interface address
  delete <addr>    Remove an interface address
  mtu <n>          Set the interface maximum transmission unit to <n>
