Re: [SLE] Subnet 169.254.0.0

ray canfield

19 Aug 2004 19 Aug '04

16:19

The idea is to make 9.1 zeroconf ready. http://www.zeroconf.org

zeroconf is a system for configuring machines completely automatically, assigning ip addresses on local lan without dhcp and all, and the 169.254/16 network is a part of that

do we really need computers marketed for the stupid? in the end it'll be windoze all over again. -- ray http://www.redrum.org rcanfiel@blade.redrum.org "UNIX _IS_ user friendly, its just picky about who its friends are."

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SRGlasoe

19 Aug 19 Aug

16:56

New subject: [SLE] Subnet 169.254.0.0

On Thu August 19 2004 11:19 am, ray canfield wrote:

...

...
The idea is to make 9.1 zeroconf ready. http://www.zeroconf.org

zeroconf is a system for configuring machines completely automatically, assigning ip addresses on local lan without dhcp and all, and the 169.254/16 network is a part of that

do we really need computers marketed for the stupid? in the end it'll be windoze all over again.

-- ray

The legend I have heard is that 169.254.x.x is a Class B address range that was owned by an individual that worked at Microsoft. He sold it to Microsoft and Microsoft put it to use for those instances where no DHCP server or static address was available. WIndows OS could then boot up without timing out waiting for a network connection. I believe Microsoft has voluntarily retired this Class B range for the public good to be used in ways that Anders and others have described. I don't believe that it is a public internet, routable IP address range just like 192.168.x.x and 10.x.x.x. Thats what I've heard anyway... And yes, I do believe we need computers that are easy for anyone to use so that there will always be a need for computer service and support professionals. Stan Stan

Jerry Feldman

18:52

New subject: [SLE] Subnet 169.254.0.0

On Thu, 19 Aug 2004 11:56:53 -0500 SRGlasoe wrote:

...

I don't believe that it is a public internet, routable IP address range just like 192.168.x.x and 10.x.x.x. It definitely is not. I checked with IANA before I posted my original message. only 192.168.x.x and 10.x.x.x. and 172.16.x.x.

BTW: here is the IANA writeup on 169.254: 169.254.0.0/16 - This is the "link local" block. It is allocated for communication between hosts on a single link. Hosts obtain these addresses by auto-configuration, such as when a DHCP server may not be found. -- Jerry Feldman Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

SRGlasoe

21:45

New subject: [SLE] Subnet 169.254.0.0

On Thu August 19 2004 1:52 pm, Jerry Feldman wrote:

...

On Thu, 19 Aug 2004 11:56:53 -0500

SRGlasoe wrote:

...
I don't believe that it is a public internet, routable IP address range just like 192.168.x.x and 10.x.x.x.

It definitely is not. I checked with IANA before I posted my original message. only 192.168.x.x and 10.x.x.x. and 172.16.x.x.

Agreed. Should have worded my reply better. It is advised to NOT route this through the public internet. It is advised to treat it AS IF it is a private subnet like 192.169.x.x., 172.16.x.x and 10.x.x.x and not let it out 'into the wild'.

...

BTW: here is the IANA writeup on 169.254: 169.254.0.0/16 - This is the "link local" block. It is allocated for communication between hosts on a single link. Hosts obtain these addresses by auto-configuration, such as when a DHCP server may not be found.

Exactly. A little further googling on my part and this range seems to have originated from MS with link-local in mind. http://files.zeroconf.org/draft-ietf-zeroconf-ipv4-linklocal.txt section 2.6.2 gives a good explanation for this range. Appears also that SUSE 9.1 is the first time its been used by SUSE. Stan

Jerry Feldman

20 Aug 20 Aug

11:53

New subject: [SLE] Subnet 169.254.0.0

...

Exactly. A little further googling on my part and this range seems to have originated from MS with link-local in mind. http://files.zeroconf.org/draft-ietf-zeroconf-ipv4-linklocal.txt section 2.6.2 gives a good explanation for this range. Appears also that SUSE 9.1 is the first time its been used by SUSE. That is true. I initially was curious because the first time I saw this in the routing table was when I was trying to set my laptop up at MIT. Under 9.0, I had several profiles, but they were destroyed when I upgraded to 9.1, and I rebuilt the profiles. I initially had the MIT

On Thu, 19 Aug 2004 16:45:09 -0500 SRGlasoe wrote: profile set up with the wrong static IP address, but I had forgotten my PDA that had all the info, which is one reason why I was checking the routing table. -- Jerry Feldman Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

Richard

19 Aug 19 Aug

17:20

New subject: [SLE] Subnet 169.254.0.0

On Thursday 19 August 2004 11:19 am, ray canfield wrote:

...

...
The idea is to make 9.1 zeroconf ready. http://www.zeroconf.org

zeroconf is a system for configuring machines completely automatically, assigning ip addresses on local lan without dhcp and all, and the 169.254/16 network is a part of that

do we really need computers marketed for the stupid? in the end it'll be windoze all over again.

Of course we do! What we really need are computers that are usable by people who like to work on things other than computers. Once upon a time I enjoyed working on cars, now they are simply a means of transportation. Computers should be the same, something the average guy can use to help him do productive work or fun. But, the guy that likes to putter with electrics and such things should have the option to play to his hearts content. No one should have all the fun to the exclusion of others with different tastes. richard

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Jerry Feldman
ray canfield
Richard
SRGlasoe