Sorry, I sent my reply with the subject in spanish, I was reviewing it with another student and forgot to change it.
---- Hi Grigory, First of all thanks for your answer, it helped me very much to understand the seq number renumbering problem. But I have a cuestion about your example, I think it only works when all packets arrive ordered, not when one or more get delayed and the packets start arriving in desorder. Please see this modified version of your example, please look at packet 5. 1) (OUT) IPv4 <- IPv6 Dout = 0, Din = 0 L4 = 20 <- L6 = 50 D'out = -30, D'in = 0 SN'out = SNout + Dout = 100 <- SNout = 100 AN'out = ANout - Din = 500 <- ANout = 500 Result: Dout += D'out = -30, Din += D'in = 0 2) (IN) IPv4 -> IPv6 Dout = -30, Din = 0 L4 = 40 -> L6 = 60 D'out = 0, D'in = 20 SNin = 500 -> SN'in = SNin + Din = 500 ANin = 120 -> AN'in = ANin - Dout = 150 Result: Dout += D'out = -30, Din += D'in = 20 3) (OUT) IPv4 <- IPv6 Dout = -30, Din = 20 L4 = 40 <- L6 = 40 D'out = 0, D'in = 0 SN'out = SNout + Dout = 120 <- SNout = 150 AN'out = ANout - Din = 540 <- ANout = 560 Result: Dout += D'out = -30, Din += D'in = 20 4) (IN) IPv4 -> IPv6 Dout = -30, Din = 20 L4 = 40 -> L6 = 60 D'out = 0, D'in = 20 SNin = 540 -> SN'in = SNin + Din = 560 ANin = 160 -> AN'in = ANin - Dout = 190 Result: Dout += D'out = -30, Din += D'in = 40 5) (IN) IPv4 -> IPv6 Dout = -30, Din = 40 L4 = 40 -> L6 = 60 D'out = 0, D'in = 20 SNin = 580 -> SN'in = SNin + Din = 620 ANin = 160 -> AN'in = ANin - Dout = 190 Result: Dout += D'out = -30, Din += D'in = 60 6) (OUT) IPv4 <- IPv6 Dout = -30, Din = 60 L4 = 30 <- L6 = 40 D'out = -10, D'in = 0 SN'out = SNout + Dout = 160 <- SNout = 190 AN'out = ANout - Din = 560 <- ANout = 620 Result: Dout += D'out = -40, Din += D'in = 40 As you can see, packets 4 and 5 comes from the same direction, both modify Din and when packet 6 arrives in the other direction, it takes the last known Din to calculate AN'out. As the packet 6 is the answer for packet 4, it should have AN'out=580 and not 560. What do you think of this? I hope I made my self clear. -- ------------------------------- Juan Luis Baptiste M. Linux registered user #119248 http://www.merlinux.org "we're back to the times when men where men and wrote their own drivers" Linus Torvalds ------------------------------- -- Get your free email from www.linuxmail.org Powered by Outblaze --------------------------------------------------------------------- The IPv6 Users Mailing List Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED]
