Documentation/networking/alias.txt

   1
   2 IP-Aliasing:
   3 ============
   4
   5 IP-aliases are additional IP-addresses/masks hooked up to a base
   6 interface by adding a colon and a string when running ifconfig.
   7 This string is usually numeric, but this is not a must.
   8
   9 IP-Aliases are avail if CONFIG_INET (`standard' IPv4 networking)
  10 is configured in the kernel.
  11
  12
  13 o Alias creation.
  14   Alias creation is done by 'magic' interface naming: eg. to create a
  15   200.1.1.1 alias for eth0 ...
  16
  17     # ifconfig eth0:0 200.1.1.1  etc,etc....
  18                    ~~ -> request alias #0 creation (if not yet exists) for eth0
  19
  20     The corresponding route is also set up by this command.
  21     Please note: The route always points to the base interface.
  22
  23
  24 o Alias deletion.
  25   The alias is removed by shutting the alias down:
  26
  27     # ifconfig eth0:0 down
  28                  ~~~~~~~~~~ -> will delete alias
  29
  30
  31 o Alias (re-)configuring
  32
  33   Aliases are not real devices, but programs should be able to configure and
  34   refer to them as usual (ifconfig, route, etc).
  35
  36
  37 o Relationship with main device
  38
  39   If the base device is shut down the added aliases will be deleted
  40   too.
  41
  42
  43 Contact
  44 -------
  45 Please finger or e-mail me:
  46    Juan Jose Ciarlante <jjciarla@raiz.uncu.edu.ar>
  47
  48 Updated by Erik Schoenfelder <schoenfr@gaertner.DE>
  49
  50 ; local variables:
  51 ; mode: indented-text
  52 ; mode: auto-fill
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