Hi!
r285785 still isn't MFCed.
RC2 is coming soon.

2015-07-23 10:54 GMT+03:00 Pavel Timofeev <tim...@gmail.com>:
> 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"

Reply via email to