Date: Wed, 27 Aug 2014 00:58:46 -0300 From: Raimundo Santos <raitech@gmail.com> To: =?UTF-8?Q?Olivier_Cochard=2DLabb=C3=A9?= <olivier@cochard.me> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: 9.3 RELEASE not forwarding pkt-gen (netmap) packets over XenServer Message-ID: <CAGQ6iC_Tu2xsktkbf6o4hZaoVB6vhWMyv61qyWR_cyqUUVp5ww@mail.gmail.com> In-Reply-To: <CA%2Bq%2BTcpGgG58Nzjk0X2duvtPL%2BcGUXKjKTMm6i5S%2BWaz%2BM0C-A@mail.gmail.com> References: <CAGQ6iC_4kd-ELDtU2jxzAep3rEUtrrdMjau3YuOdQ8Qm5oU6VA@mail.gmail.com> <CAGQ6iC8V0Ov%2B5%2B3U8ySrcBV-wUqxhd8hJeMrKQN=VSECkW8UCw@mail.gmail.com> <CA%2Bq%2BTcpGgG58Nzjk0X2duvtPL%2BcGUXKjKTMm6i5S%2BWaz%2BM0C-A@mail.gmail.com>
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On 26 August 2014 20:16, Olivier Cochard-Labb=C3=A9 <olivier@cochard.me> wr= ote: > > On Tue, Aug 26, 2014 at 9:35 PM, Raimundo Santos <raitech@gmail.com> wrote: >> >> >> 15:38:13.286119 00:1b:21:53:51:3d > 00:1b:21:53:51:39, ethertype IPv4 >> (0x0800), length 60: (tos 0x10, ttl 64, id 0, offset 0, flags [DF], prot= o >> UDP (17), length 46, bad cksum 6605 (->6604)!) >> >> 10.0.0.1.0 > 192.168.10.2.0: [bad udp cksum 0x5e7c -> 0x5e7b!] UDP, >> length 18 >> > > Hi, > > the bad UDP checksum seems related to this pkt-gen bug: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D187149 Hello Olivier, thank you for pointing it out. That patch help me to achieve my needs. > > > > pkt-gen one checksum for all the paquets it generate (then once it update the IP or port, the checksum didn't match). > Applying the patch correctly update the checksum for all paquets (but it have a performance impact). As my needs are somehow low, I can not notice any performance penalty. Cheers, Raimundo Santos
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