XPost: comp.os.linux.networking   
   From: grahn+nntp@snipabacken.se   
      
   On Sun, 2011-05-22, Mark Hobley wrote:   
   ...   
   > I'll try dropping another 12 bytes off the ip route command and retest:   
   >   
   > ip route change default via 10.0.0.1 mtu lock 1400   
   >   
   > Am I right in that the below datagram is wrong, because the mss is 1460,   
   > which is above the value of the mtu in the routing table? Shouldn't the   
   > value of the mtu have been factored in here, and a new mss calculated based   
   > on the mtu?   
   >   
   > 03:43:04.320740 IP venus.markhobley.yi.org.52201 >   
   > news.eternal-september.org.nntp: Flags [S], seq 2304145392, win 14600,   
   > options [mss 1460,sackOK,TS val 47122576 ecr 0,nop,wscale 5], length 0   
      
   Yes, that seems wrong too. I have only messed with that once, as an   
   experiment, but I am pretty sure my TCP stack understood it and set   
   mss in the SYN accordingly. (I used 'route ... mss N' to do it, not   
   ip(8), but that shouldn't matter.)   
      
   /Jorgen   
      
   --   
     // Jorgen Grahn    O  o   .   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)