I just did a
capture of a file transfer from a Windows 7 computer to a Linux FTP server. I
can see the Windows client reporting its MSS at 1460. Then I see the FTP
server reporting its MSS at 1460. But when the transfer starts, the client sends
2896-byte packets!
Following are the
settings on the Windows client box.
C:\>netsh
interface ipv4 show subinterface
MTU MediaSenseState Bytes In Bytes Out
Interface
------ --------------- --------- ---------
-------------
4294967295
1
0 22655 Loopback Pseudo-Interface
1
1500
1 271689236 1374564858 Local Area
Connection
C:\>netsh int tcp show global
Querying
active state...
TCP Global
Parameters
----------------------------------------------
Receive-Side
Scaling State :
enabled
Chimney Offload
State
: disabled
NetDMA
State
: enabled
Direct Cache Acess
(DCA) :
disabled
Receive Window Auto-Tuning Level :
disabled
Add-On Congestion Control Provider : ctcp
ECN
Capability
: disabled
RFC 1323
Timestamps
: disabled
--
Eric
Robinson
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