----- Original Message ----- From: "Juan Luis Baptiste" <[EMAIL PROTECTED]> Date: Tue, 09 Jul 2002 07:07:52 +0800 To: [EMAIL PROTECTED] Subject: Fw: Ejemplo numeros de secuencia
> 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 nueral 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? > > Juan Luis > -- > Get your free email from www.linuxmail.org > > > Powered by Outblaze > --------------------------------------------------------------------- > The IPv6 Users Mailing List > Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED] > -- Get your free email from www.linuxmail.org Powered by Outblaze --------------------------------------------------------------------- The IPv6 Users Mailing List Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED]
