Ok, sorry!
2015-07-23 7:51 GMT+03:00 Wei Hu <w...@microsoft.com>: > The TCP offloading is still working on these platforms. There is no flag to > distinguish UDP and TCP offloading, so the RXCSUM and TXCSUM are still set. > Let me know if there is any other way to show it properly. > > Thanks, > Wei > > > -----Original Message----- > From: Pavel Timofeev [mailto:tim...@gmail.com] > Sent: Wednesday, July 22, 2015 9:04 PM > To: Wei Hu <w...@microsoft.com> > Cc: Slawa Olhovchenkov <s...@zxy.spb.ru>; freebsd-curr...@freebsd.org; > freebsd-virtualization@freebsd.org > Subject: Re: MS DNS doesn't answer to CURRENT under Hyper-V > > Hi! I see you have done the code for disabling UDP checksum offloading when > running on the Hyper-V on Windows Server 2012 and earlier hosts > > https://svnweb.freebsd.org/base?view=revision&revision=285785 > > I tried new CURRENT and it works. Thank you! > > A small note here: while it disables and works it still shows RXCSUM and > TSCSUM in iface's options: > > root@proxy:/usr/src # ifconfig hn0 > hn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=31b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,TSO4,TSO6> > ether 00:15:5d:02:9c:09 > inet 192.168.25.26 netmask 0xffffffc0 broadcast 192.168.25.63 > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> > > Is it possible to hide it automatically if it's disabled by new code? > > > 2015-07-13 11:06 GMT+03:00 Wei Hu <w...@microsoft.com>: >> We have root caused the problem. This issue happens on the Hyper-Vs on >> Windows Server 2012 (Win 8.0) and earlier releases. On these releases, the >> UPD checksum offloading on host side does not work properly. The workaround >> is to disable UPD checksum offloading in the FreeBSD guest through >> 'ifconfig'. We are also working on a patch to turn off UPD checksum >> offloading in the netvsc driver when detecting the Hyper-V releases. >> >> The UDP checksum offloading works fine on Windows Server 2012R2 and Win 8.1 >> hosts. >> >> Thanks Pavel and Slawa for the support. >> >> Wei >> >> >>> -----Original Message----- >>> From: owner-freebsd-virtualizat...@freebsd.org [mailto:owner-freebsd- >>> virtualizat...@freebsd.org] On Behalf Of Pavel Timofeev >>> Sent: Wednesday, July 8, 2015 4:06 PM >>> To: Slawa Olhovchenkov >>> Cc: freebsd-curr...@freebsd.org; freebsd-virtualization@freebsd.org >>> Subject: Re: MS DNS doesn't answer to CURRENT under Hyper-V >>> >>> Ok, r284746 is the root of the problem. MS DNS works under r284745 >>> and doesn't work under r284746. >>> Slawa, what should I look at in wireshark output? >>> >>> >>> 2015-07-07 18:49 GMT+03:00 Slawa Olhovchenkov <s...@zxy.spb.ru>: >>> > On Tue, Jul 07, 2015 at 06:04:46PM +0300, Pavel Timofeev wrote: >>> > >>> >> Well, turning off checksum offloading by `ifconfig hn0 -txcsum >>> >> -rxcsum` definitely helps. >>> >> >>> >> As for tcpdump I'm not completely sure if I did it right, but I >>> >> see "bad udp cksum" phrase: >>> >> >>> >> # tcpdump -i hn0 -vvv -nn udp dst port 53 >>> >> tcpdump: listening on hn0, link-type EN10MB (Ethernet), capture >>> >> size >>> >> 262144 bytes >>> >> 18:01:19.139994 IP (tos 0x0, ttl 64, id 61218, offset 0, flags >>> >> [none], proto UDP (17), length 51) >>> >> 192.168.25.26.45683 > 192.168.25.3.53: [bad udp cksum 0xb39e >>> >> -> 0xf210!] 52886+ A? ya.ru. (23) >>> >> 18:01:24.140544 IP (tos 0x0, ttl 64, id 17293, offset 0, flags >>> >> [none], proto UDP (17), length 51) >>> >> 192.168.25.26.12575 > 192.168.25.3.53: [bad udp cksum 0xb39e >>> >> -> 0x7365!] 52886+ A? ya.ru. (23) >>> > >>> > tcpdump "bad udp cksum" is normal on FreeBSD host in case checksum >>> > offload (and may be need only for help finding issuse in code). >>> > Need wireshark capturing from MS DNS host (or from mirroring port). >>> _______________________________________________ >>> freebsd-virtualization@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization >>> To unsubscribe, send any mail to "freebsd-virtualization- >>> unsubscr...@freebsd.org" _______________________________________________ freebsd-virtualization@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
