> "When an lwB4 receives an IPv4 packet from its connected host that is > larger than the MTU size after encapsulation, the lwB4 MUST fragment > the IPv4 packet before encapsulation." > > If the DF flag is set, the packet shouldn't be fragmented, instead PMTUD > mechanism should be honored. Right? Fragmenting an IPv4 packet with DF bit > set sounds like a bad thing.
One more thing I find puzzling - RFCs 2473 and 6333 state that you have to encapsulate the packet first into IPv6 and if it exceeds the IPv4-in-IPv6 tunnel MTU, fragment the IPv6 packet. This draft states the opposite thing, if the encapsulated packet is larger than the tunnel MTU, you have to fragment IPv4 and then encapsulate it into IPv6. In my opinion, the simpler thing to do would be to encapsulate first and fragment afterwards. I think this is also a problem because RFC 6333 describes fragmentation only from the AFTR's viewpoint and this draft describes it from the B4's viewpoint. Since this draft refers to RFC6333 for fragmentation, it would mean that the lwAFTR and lwB4 would have different fragmentation logic. Branimir <HTML><P><FONT face=Arial color=#999999 size=1> IZJAVA O ODRICANJU ODGOVORNOSTI: Sadržaj ove poruke i eventualno priloženih datoteka je povjerljiv i namijenjen je samo osobama ili subjektima koji su navedeni u adresi. Ukoliko ste primili ovu poruku greškom, molimo Vas, obavijestite pošiljatelja, a poruku i sve njene privitke odmah, bez čitanja, trajno uklonite s računala. Bilo kakvo prenošenje, kopiranje ili distribucija informacija sadržanih u poruci trećim osobama je zabranjeno i može biti zakonski kažnjivo. Sadržaj, stavovi i mišljenja izneseni u poruci su autorovi i ne predstavljaju nužno stavove HT - Hrvatskih telekomunikacija d.d. HT ne prihvaća nikakvu odgovornost za eventualnu štetu nastalu primitkom ove poruke i priloga sadržanih u poruci. </FONT></P><P><FONT face=Arial color=#999999 size=1> DISCLAIMER:The contents of this email as well as any files attached to it are confidential and intended solely for individuals or entities which they are addressed to. If you have received this email message in error, please notify the sender and permanently remove the message and all attached files from the computer. Any disclosure, copying or distribution of all or a part of information contained herein to or by third parties is prohibited and may be unlawful. Please note that any views or opinions presented in this message are solely those of the author and do not necessarily represent the views and opinions of Croatian Telecom Inc. Croatian Telecom Inc. accepts no liability for any potential damage caused by this message and files attached to it. </FONT></P></HTML> _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
