Subject: Re: bge(4) tcp4csum problem -- driver problem or chip problem???
To: Brian Buhrow <>
From: Jason Thorpe <>
List: tech-kern
Date: 12/19/2006 09:23:47
On Dec 19, 2006, at 9:01 AM, Brian Buhrow wrote:

> 	Hello.  During my tests, the only variable I changed was the tcp4csum
> value with ifconfig on the bge(4) interface.  Ip4csum and udp4csum  
> were
> enabled during all tests, and remain so on this production machine.  I
> didn't think to try disabling ip4csum while leaving tcp4csum  
> enabled.  Are
> these settings not hierarchical?  That is, if you enable tcp4csum,  
> are you
> not, by implication, also enableing ip4csum checking?

No.  The IP header checksum and the TCP header+payload checksum are  

-- thorpej