On Sun, Mar 22, 2009 at 09:55:15AM -0400, Jeremy Jackson wrote: > On Sun, 2009-03-22 at 06:26 -0700, Garry Dolley wrote: > > Dear linux-net, > > > > I'm running the stock kernel of Ubuntu Hardy: > > 2.6.27-7-generic #1 SMP Tue Nov 4 19:33:06 UTC 2008 x86_64 GNU/Linux > > > > My eth0 is: > > driver: e1000e > > version: 0.3.3.3-k6 > > firmware-version: 2.1-12 > > bus-info: 0000:04:00.0 > > > > If have several VLANs configured on eth0, such as: > > > > eth0.105 > > eth0.106 > > eth0.107 > > > > When I run tcpdump on each, I can see the traffic for the respective VLAN. > > When I tcpdump eth0, I can see the traffic for *all* the VLANs. > > > > So far so good. > > > > Except, when I look at the traffic for all the VLANs, the VLAN ID is not > > present. Many hours of googling, looking at the e1000e driver code and VLAN > > code, and picking other ppl's brains, has led me to believe that VLAN > > hardware acceleration is stripping the tag from the frame, so I can't actually > > see the VLAN ID. > > > > So my question is, is it possible to turn hwaccel off for this card without > > hacking and recompiling the driver? Or can I get the VLAN ID using some other > > method that I don't know about? > > ethtool -K--offload ethX [rx on|off] [tx on|off] [sg on|off] [tso on| > off] [ufo on|off] [gso on|off] Looking at the ethtool man page for all the those options doesn't reveal anything about any of them being for hw accelerated VLAN encoding/decoding. Yet, I'll play around with some and see if it helps. > > Also, some of code and commit messages I've read seem to indicate even if > > tcpdump could show me the VLAN ID, I wouldn't necessarily get any of this > > traffic unless eth0 is in promisc mode. > > > > My main goal here is to be able to bridge eth0 to another device and ensure > > that that device can see all the tagged traffic that comes in eth0. eth0 is > > plugged into a Cisco switch and is a trunk port. > > Bridging + vlans has some limitations (being worked on at present IIRC) in Linux kernel. FYI Thanks for the info. -- Garry Dolley ARP Networks, Inc. http://www.arpnetworks.com Data center, VPS, and IP transit solutions (818) 206-0181 Member Los Angeles County REACT, Unit 336 WQGK336 Blog http://scie.nti.st -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
