Hi Mark,

Thanks for your reply. But for ipv6, fragmentation will happen at the host
side.Intermediate routers will not do it and depending on the path MTU
packets are fragmented at the initiator side. so while originating packets
itself will do fragmentation.. Since the packets are sent with DF set as
one, packets has to be dropped there itself.

If I am wrong, Please give some more explanation.

Thanks In advance,
Niviya

On Mon, May 3, 2010 at 5:10 PM, Mark Andrews <[email protected]> wrote:

>
> In message <[email protected]>,
> niviya vijayan writes:
> > Hi All,
> >
> > I am using linux os version 2.6.10 and i have an mtu configured 1500
> .When i
> > do a ping6 request  with size 1800 and DF bit set as yes, i could see a
> > fragmentation happening eventhough DF bit is set. As per my understanding
> ,
> > Ping6 request has to be dropped.Correct me if am wrong.Did anyone face
> > this issue anytime before?
> >
> > Looking forward to hear from you...
> >
> > Regards,
> > Niviya
>
> Fragmentation and DF are not mutually exclusive.  DF says don't
> fragment when forwarding.  When you are originating the packet
> you are not forwarding.
>
> Mark
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: [email protected]
>
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