Lingyun Li writes: > It was found on Sun Fire V440 with Solaris 9. NIC is ce and MTU is set to > 1500. During the TCP connect phase, the TCP MSS value returned in the SYN ACK > packet by V440 is 110. We can't figure out why the value is so small, 'cause > in most cases it should be 1460. By using ethereal, we captured the packets > for both nomal case (MSS is 1460) and abnormal case (MSS is 110), we found > the only difference is: In normal case, the IP DSCP value of the initial > connection request from client is set to 0, while in the abnormal case, DSCP > value is set to 0x12. We don't know if that's the root cause of getting a > small MSS in SYN ACK? If yes, how DSCP value affects the MSS calculation in > brief? If no, where else should we look for the root cause?
I don't know of any relationship between the two, but lacking a copy of that packet trace or some indication of what you were doing at the time, it's going to be hard for anyone else to investigate the problem. -- James Carlson, KISS Network <[EMAIL PROTECTED]> Sun Microsystems / 1 Network Drive 71.232W Vox +1 781 442 2084 MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677 _______________________________________________ networking-discuss mailing list [email protected]
