[e2e] Question on MTU

[Bob Braden]

  *> 
  *> But the advertised MSS in the TCP MSS option should not be adjusted to 
  *> reflect any options or intermediary headers, just the fixed IP and TCP 
  *> header sizes; 40 bytes for IPv4/TCP, and 60 bytes for IPv6/TCP.  When 
  *> the sender generates the packet, he is responsible for reducing the TCP 
  *> data to allow room for any additional options or headers.
  *> 
  *> 			-David Borman
  *> 

Right.

Please see Section 4.2.2.6 of RFC 1122 "Requirements for Internet
Hosts - Communication Layers" for the details.

Bob Braden