Hi, On Sun, Dec 17, 2006 at 03:52:49PM -0500, Kris Kennaway wrote: > On Sun, Dec 17, 2006 at 11:46:24PM +0300, Andrew Pantyukhin wrote: > > I'm not sure what it's all about, but with today's > > current whatever goes out my vge interface (icmp/ > > tcp/udp) has bad checksum: > > This is a FAQ; it's probably using hardware checksum offloading. > > Since the packet passed down to the NIC does not yet have the checksum > computed, it looks to tcpdump like the checksum is incorrect. However > if you look at the packet actually transmitted by the NIC > (e.g. tcpdump on another host), you'll see that it has the correct > checksum. > Kris, you probably missed a commit by csjp_at_ where it was fixed. : revision 1.220 : date: 2006/11/18 23:17:22; author: csjp; state: Exp; lines: +40 -0 : Currently, drivers that support hardware offload of VLAN tag : processing are forced to toggle this functionality when the card : is put in and out of promiscuous mode. The main reason for this : is because the hardware strips the VLAN tag, making it impossible : for the tag information to show up in network diagnostic tools like : tcpdump(1). : [...] Andrey, have you been able to narrow your problem down to either this commit, my vge(4) commit (though you tested it as well before it was committed), or to FAST_IPSEC? Cheers, -- Ruslan Ermilov ru_at_FreeBSD.org FreeBSD committer
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