bce(4) sees all incoming frames as 2026 bytes in length

Nikolay Denev ndenev at gmail.com
Wed Apr 29 13:32:23 UTC 2009


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Hello,

I have the following problem with the new bce(4) driver on a 7.2- 
PRERELEASE from a few days ago.
When I run tcpdump on the bce interface on the machine, all incoming  
frames are shown as 2026 in size,
but on the sending machine tcpdump reports that it's sending frames of  
the correct size.
This looks very strange because I don't have enabled Jumbo Frames on  
this bce interface , and it is still with it's default MTU of 1500  
bytes.
When I tried to capture the packets, they are zero padded to the 2026  
frame size. The checksums are correct, so I suspect a driver bug?

P.S.: I experience this problem on several machines with bce  
interfaces, and on all of them tcpdump sees all incoming frames with  
length of 2026 bytes.

Regards,
Niki Denev

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