Mailinglist Archive: opensuse (4634 mails)

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Re: [opensuse] What is link-local for?
  • From: "Carlos E. R." <robin.listas@xxxxxxxxxxxxxx>
  • Date: Sun, 17 Dec 2006 14:49:59 +0100 (CET)
  • Message-id: <Pine.LNX.4.64.0612171447590.901@xxxxxxxxxxxxxxxx>
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The Saturday 2006-12-16 at 20:18 -0900, John Andersen wrote:

> My older servers don't have this but my 9.3 and onwards seems
> to always have this, and I'm not sure what its for.

:-)

http://en.wikipedia.org/wiki/Private_network

| Link-local addresses (Zeroconf)
|
| A second set of private network is the link-local address range codified
| in RFCs 3330 and 3927. The intention behind these RFCs is to provide an
| IP address (and by implication, network connectivity) without a DHCP
| server being available and without having to configure a network address
| manually. The subnet 169.254/16 has been reserved for this purpose.

| If a network address cannot be obtained via DHCP, an address from
| 169.254.1.0 to 169.254.254.255 is assigned randomly. The standard
| prescribes that address collisions must be handled gracefully. Within
| the 169.254/16 address range, the subnets 169.254.0/24 and
| 169.254.255/24 have been set aside for future use.
|
| As with the private network addresses defined in RFC 1918, packets from
| this subnet must not be routed to the internet at large.


- --
Cheers,
Carlos E. R.

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