| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
| 53 | ; end: |