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</o:shapelayout></xml><![endif]--></head><body lang=IT link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>Ciao a tutti,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>scrivo per far presente un problema che potrebbe coinvolgere anche voi su connessioni verso gli Stati Uniti.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Stiamo rilevando da fine Dicembre una perdita di pacchetti su connessioni che transitano su Level3 dal loro nodo di Washington.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Se la connessione è instaurata con un IPv4 che termina con un numero dispari i pacchetti non passano, se pari la connessione viene stabilita correttamente.<o:p></o:p></p><p class=MsoPlainText>Non ne sono certo, ma sembrerebbe che i pacchetti DNS passino nella maniera contraria, quindi solo con IP dispari.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Allego due trace e due ping.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Il primo con IP pari (es. *.*.*.250), che raggiunge correttamente la destinazione:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Tracing route to sccp.skillport.com [209.235.9.7]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>over a maximum of 30 hops:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 1 <1 ms <1 ms <1 ms 10.200.0.2<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 2 <1 ms <1 ms <1 ms vl-04.1.edge.milan.mainsoft.it [185.45.209.3]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 3 <1 ms <1 ms <1 ms xe-10-0-1.bar2.milan1.level3.net [213.242.65.177<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:9.0pt'>]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 4 95 ms 95 ms 95 ms ae-21-3603.car1.washington1.level3.net [4.69.158<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>.133]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 5 99 ms 99 ms 100 ms sungard-net.car1.washington1.level3.net [4.34.23<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>6.86]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 6 103 ms 104 ms 103 ms phl2cr1-te-0-0-1-2.sgns.net [66.179.228.222]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 7 103 ms 102 ms 104 ms bosir6-xe-1-2-0-0.sgns.net [69.164.83.170]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 8 103 ms 101 ms 101 ms relayer.skillport.com [209.235.10.36]<o:p></o:p></span></p><p class=MsoPlainText><b><span lang=EN-US style='font-size:9.0pt'> 9 102 ms 102 ms 102 ms sccp.skillport.com [209.235.9.7]<o:p></o:p></span></b></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Trace complete.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Pinging sccp.skillport.com [209.235.9.7] with 32 bytes of data:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Reply from 209.235.9.7: bytes=32 time=105ms TTL=243<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Reply from 209.235.9.7: bytes=32 time=102ms TTL=243<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Reply from 209.235.9.7: bytes=32 time=103ms TTL=243<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Reply from 209.235.9.7: bytes=32 time=104ms TTL=243<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText>Il secondo con IP dispari (es. *.*.*.251), che si ferma sulla rete di Level3.<o:p></o:p></p><p class=MsoPlainText><span style='font-size:9.0pt'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Tracing route to sccp.skillport.com [209.235.9.7]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>over a maximum of 30 hops:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 1 <1 ms <1 ms <1 ms 10.200.0.2<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 2 <1 ms <1 ms <1 ms vl-04.1.edge.milan.mainsoft.it [185.45.209.3]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 3 <1 ms <1 ms <1 ms xe-10-0-1.bar2.milan1.level3.net [213.242.65.177<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 4 259 ms 192 ms 219 ms ae-21-3603.car1.washington1.level3.net [4.69.158<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>.133]<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 5 * * * Request timed out.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 6 * * * Request timed out.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 7 * * * Request timed out.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'> 8 * * * Request timed out.<o:p></o:p></span></p><p class=MsoPlainText><b><span lang=EN-US style='font-size:9.0pt'> 9 * * * Request timed out.<o:p></o:p></span></b></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Pinging sccp.skillport.com [209.235.9.7] with 32 bytes of data:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Request timed out.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='font-size:9.0pt'>Request timed out.<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:9.0pt'>Request timed out.<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:9.0pt'>Request timed out.<o:p></o:p></span></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Non mi è tutt’ora chiaro se ci sia una qualche formula matematica più complessa che divide gli IP tra quelli che passano e quelli che non passano.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Sembra una cosa molto simile a quella accaduta con Telecom Italia tempo fa...<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Qualcuno che ha una connessione con Level3 potrebbe eseguire un test?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Grazie a tutti per il vostro tempo,<o:p></o:p></p><p class=MsoPlainText>Giovanni.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><span style='mso-fareast-language:IT'>Giovanni Proscia<o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'>ICT Manager<o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'>IT/Development<o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'><o:p> </o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'>g.proscia@mainsoft.it<o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'>Office +39 02.893710.03<o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'><o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'>Mainsoft<o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'>Viale Sarca, 336/F <o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'>20126 Milano (MI) Italy<o:p></o:p></span></p><p class=MsoPlainText><span style='mso-fareast-language:IT'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US style='mso-fareast-language:IT'>Mainsoft home page<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='mso-fareast-language:IT'>Phone +39 02 5454104<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='mso-fareast-language:IT'>Fax +39 02 66112250<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='mso-fareast-language:IT'>Think before you print.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='mso-fareast-language:IT'><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US style='mso-fareast-language:IT'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p></div></body></html>