Re: Meta-issues: On the deprecation of the fragmentation function

2013-06-28 Thread Hannes Frederic Sowa
On Fri, Jun 28, 2013 at 10:33:12PM +, Templin, Fred L wrote: > Hi Fernando, > > > Considering the above, I guess I'm in the camp of "avoid fragmentation > > where possible". However, I don't think I'd go as far as deprecating > > it. > > I was originally thinking this way too, but now I am th

link local address handling while changing hw address of interface

2013-04-04 Thread Hannes Frederic Sowa
Hello! What is the proposed action if the hardware address of an interface is changed regarding link-local addresses while the interface is up? I see a few possibilities here but have not yet found an answer in the rfcs: a) generate a new link-local interface address in addition to the old one b)

Re: IPV6_USE_MIN_MTU and IPV6_DONT_FRAG questions

2012-11-14 Thread Hannes Frederic Sowa
On 11/14/2012 09:50 AM, Brian E Carpenter wrote: >> Do we know of any use cases for IPV6_USE_MIN_MTU on TCP sockets? > > I think the use case is when there is a user option to use 1280 bytes > because of a path MTU limitation due to a tunnel, *and* PMTUD and/or > fragmentation fails. (Read draft-

Re: IPV6_USE_MIN_MTU and IPV6_DONT_FRAG questions

2012-11-14 Thread Hannes Frederic Sowa
On 11/13/2012 12:27 AM, Mark Andrews wrote: > In message <50a111fb.2060...@bfk.de>, Hannes Frederic Sowa writes: >> On 11/07/2012 02:30 AM, Mark Andrews wrote: >>> Should setting IPV6_USE_MIN_MTU to one (1) result in fragmented TCP packets? >>> Should setting IPV

Re: IPV6_USE_MIN_MTU and IPV6_DONT_FRAG questions

2012-11-13 Thread Hannes Frederic Sowa
On 11/13/2012 02:34 AM, Fernando Gont wrote: > * If IPV6_USE_MIN_MTU means "use an MTU of 1280 bytes" (as opposed to > "use an MTU of *at most* 1280 bytes) then IPV6_USE_MIN_MTU might still > result in fragmentation. If, OTOH, IPV6_USE_MIN_MTU means "use an MTU of > at most 1280 bytes", then fragme

Re: IPV6_USE_MIN_MTU and IPV6_DONT_FRAG questions

2012-11-13 Thread Hannes Frederic Sowa
On 11/13/2012 12:27 AM, Mark Andrews wrote: > In message <50a111fb.2060...@bfk.de>, Hannes Frederic Sowa writes: >> On 11/07/2012 02:30 AM, Mark Andrews wrote: >>> Should setting IPV6_USE_MIN_MTU to one (1) result in fragmented TCP packets? >>> Should setting IPV

Re: IPV6_USE_MIN_MTU and IPV6_DONT_FRAG questions

2012-11-12 Thread Hannes Frederic Sowa
On 11/12/2012 04:12 PM, Hannes Frederic Sowa wrote: > On 11/07/2012 02:30 AM, Mark Andrews wrote: >> Should setting IPV6_USE_MIN_MTU to one (1) result in fragmented TCP packets? >> Should setting IPV6_DONTFRAG to one (1) work on TCP sockets? > > As I have not read ot

Re: IPV6_USE_MIN_MTU and IPV6_DONT_FRAG questions

2012-11-12 Thread Hannes Frederic Sowa
On 11/07/2012 02:30 AM, Mark Andrews wrote: > Should setting IPV6_USE_MIN_MTU to one (1) result in fragmented TCP packets? > Should setting IPV6_DONTFRAG to one (1) work on TCP sockets? As I have not read otherwise I would treat IPV6_USE_MIN_MTU as transport-agnostic. The usage of IPV6_DONTFRAG i