[Cialug] DNS Issues

[Jerry Weida]

The 169.254 addresses are not just a Windows thing. That is a scope that is 
allocated by IANA called the Automatic Private IP Addressing scope. Many 
things are starting to implement it, windows was just one of the first. It 
allows someone without networking knowledge to setup a small private network 
amongst computers and still have them be able to talk without setting up 
anything in networking (just DHCP.)
 It can be a pain, especially if you have a slower DHCP server and it ends 
up triggering APIP before it receives the offer back from the DHCP server. I 
know that in BSD that is a kernel tunable. I'm pretty sure that Linux would 
allow the same kind of tuning.

 On 8/23/05, n.d <admin at c0wzftp.com> wrote: 
> 
> i got that crazy 169 stuff to. (fedora core 4)
> 
> 
> [root at datastor ~]# route -n
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use
> Iface
> 192.168.0.0 <http://192.168.0.0> 0.0.0.0 <http://0.0.0.0> 255.255.255.0<http://255.255.255.0>U 0 0 0 eth0
> 169.254.0.0 <http://169.254.0.0> 0.0.0.0 <http://0.0.0.0> 255.255.0.0<http://255.255.0.0>U 0 0 0 eth0
> 0.0.0.0 <http://0.0.0.0> 192.168.0.1 <http://192.168.0.1> 0.0.0.0<http://0.0.0.0>UG 0 0 0 eth0
> 
> ajeffri at loopysite.org wrote:
> 
> >On Tue, Aug 23, 2005 at 07:04:30PM -0500, Stuart Thiessen wrote:
> >
> >
> >>I do not have any network on 169.254.0.0 <http://169.254.0.0>. Could it 
> be that all of my
> >>traffic is going to 169.254.0.0 <http://169.254.0.0>? Would that be able 
> to find the
> >>gateway? If 169.254.0.0 <http://169.254.0.0> is representing my alias 
> address, then I am
> >>confused because I did set the alias address with an address local to
> >>the 192.168.0.0 <http://192.168.0.0> network. I can ping it and such 
> with the designated
> >>192.168.0.xxx address.
> >>
> >>
> >
> >169.254.0.0/16 <http://169.254.0.0/16> is the address range that Windows 
> uses when it can't find an address
> >via DHCP. I don't know what it's doing in your Linux routing table, 
> however.
> >Maybe it's a case of the distro trying to be helpful.
> >
> >I just ran route -n on a box of mine that has aliases, and they don't 
> show
> >up there. They will always show up in the output of ifconfig -a as 
> something
> >like eth0:0 for the first alias, eth0:1 for the second, etc. and the real
> >interface as eth0.
> >
> >
> >
> 
> 
> 
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