Wireshark · Wireshark-users: Re: [Wireshark-users] Windows 7 Ignores TCP MSS?

["Robinson, Eric" <eric.robinson@xxxxxxxxx>]

 >  It's likely that the NIC has hardware TCP offloading enabled and you're  

>  capturing it before the NIC chops it up to 1460.   If you capture the traffic  

> from the network, you'll likely see the 1460 TCP length packets.
 

If the NIC has offloading enabled, I guess the stack knows this and sends it bigger frames, knowing it will packetize them smaller? Because I went into the adapter properties and turned off all the offloading features, and now it is being reported as expected in WireShark. So I guess when the NIC's offload capabilities are disabled, the stack detects this and only sends it frames that are appropriate for the MTU?

 

--Eric 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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