Messages in this thread | | | From | "Andrey Panin" <> | Date | Fri, 30 Jul 2010 11:00:11 +0400 | Subject | Re: Problem with e1000e, 802.1Q VLAN's and IPMI |
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On 208, 07 27, 2010 at 04:05:52 +0400, Andrey Panin wrote: > On 207, 07 26, 2010 at 09:45:06AM -0700, Brandeburg, Jesse wrote: > > > > On Mon, 26 Jul 2010, Andrey Panin wrote: > > > I have a problem using IPMI on Super Micro X7SBL motherboard (AOC-IPMI20-E BMC). > > > BMC shares ethernet port with onboard e1000e. It works when IPMI traffic is > > > untagged (CrcStripping=0 module option used), but if I try to use 802.1Q vlan > > > for IPMI traffic BMC stops responding right after "ifup eth0". > > > > We've heard of this issue (or similar) before. I believe for the other > > guys they had to run IPMI traffic untagged, if your main network is > > running untagged. The problem in this case is that the tags are being > > stripped in hardware even for the SMBUS packets, at which point the BMC > > that is stupid and doesn't understand offloading hardware gets confused > > that the traffic it is receiving doesn't have a vlan tag. > > I suspected something like that. Unfortunately Super Micro isn't interested > in fixing their BMC, at least latest firmware doesn't fix the issue. > > > > I tested 2.6.26 (debian stable kernel) and 2.6.35-rc6. > > > Looks like there is some problem with 802.1Q tags stripping/inserting. > > > > Thanks for testing the latest kernel. > > > > > There was no such problem with e1000 driver from 2.6.18. > > > > Hm, that is an interesting statement. The major changes to the driver > > include stripping tags all the time when not in promisc mode, and there > > have been some fixes and attempts to fix the ipmi issues some > > (particularly supermicro) BMCs have. I'm quite surprised it worked for > > you at all (there have been quite a few issues in this area) > > After some sleep I'm not so sure that it was really working :( > I'll retest it more thoroughly this evening.
After retest I can confirm that tagged IPMI works with 2.6.18 e1000 driver.
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