From: grahn+nntp@snipabacken.se   
      
   On Tue, 2010-09-28, Morten Reistad wrote:   
   > In article ,   
   > Jorgen Grahn   wrote:   
   >>["Followup-To:" header set to comp.protocols.tcp-ip.]   
   >>   
   >>On Mon, 2010-09-27, Morten Reistad wrote:   
   >>> In article ,   
   >>> Mark Hobley   wrote:   
   >>>>My LAN is ethernet based. However, for connectivity to the internet, I have   
   >>>>an Edimax 3g-6200n router, which connects to the internet via a 3g mobile   
   >>>>broadband stick.   
   >>>>   
   >>>>Can a 3g mobile broadband stick route the 1500 byte packets arriving from   
   >>>>the LAN without fragmentation, or should I reduce the size of the MTU for   
   >>>>outbound traffic? If so, what should I reduce it to? (My internet service   
   >>>>provider is Three Mobile, if that matters.)   
   >>>   
   >>> You expect us to answer this? You are sitting on the network. Fire   
   >>> up wireshark, or even tcpdump, and send som max-sized ping packets   
   >>> to somewhere, and then you can tell us.   
   >>   
   >>Yeah.   
   >>   
   >>I can add that there's most likely at least one bottleneck: at one   
   >>point your packets go over GTP over UDP over IP, on Ethernet.   
   >>*Someone* will get hurt if you use 1500-octet packets -- possibly the   
   >>operator.   
   >   
   > Rumors and hearsay. The tools to really find out are readily available.   
   >   
   > If you have some assertion to make, back it up with a pcap file.   
      
   I agreeed with you (he should check), and added a guess what he might   
   find. *Of course* that's hearsay!   
      
   /Jorgen   
      
   --   
     // Jorgen Grahn    O  o   .   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)