netmap ixgbevf mtu

Joe Buehler aspam at cox.net
Fri Mar 16 22:52:15 UTC 2018


Sorry, I should have added, this is LINUX if it matters.

Joe Buehler wrote:
> I am having difficulties with netmap over top of ixgbevf when attempting to use a large MTU (say 9000 bytes).
> 
> Does the ixgbevf driver use 2048 byte buffers for RX regardless of the MTU or netmap buffer size?
> 
> I can send large frames just fine but inbound frames are passed via netmap as 2048 bytes max.  It is possible that netmap is passing frames in multiple pieces I suppose, I haven't checked that yet -- my code is looking at the frame headers only at the moment so would toss trailing pieces.
> 
> Joe Buehler
> 
> 



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