Date: Tue, 26 Aug 2014 16:35:29 -0300 From: Raimundo Santos <raitech@gmail.com> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: 9.3 RELEASE not forwarding pkt-gen (netmap) packets over XenServer Message-ID: <CAGQ6iC8V0Ov%2B5%2B3U8ySrcBV-wUqxhd8hJeMrKQN=VSECkW8UCw@mail.gmail.com> In-Reply-To: <CAGQ6iC_4kd-ELDtU2jxzAep3rEUtrrdMjau3YuOdQ8Qm5oU6VA@mail.gmail.com> References: <CAGQ6iC_4kd-ELDtU2jxzAep3rEUtrrdMjau3YuOdQ8Qm5oU6VA@mail.gmail.com>
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That is what a tcpdump says (in vm0, the router):
15:38:13.286112 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], proto
UDP (17), length 46)
10.0.0.1.0 > 192.168.10.1.0: [udp sum ok] UDP, length 18
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], proto
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
All of these with txcsum, rxcsum and tso4 disabled.
I am trying to test the performance of this virtual router in using
dummynet to shape by IP and pkt-gen, with its said ability to generate
packets with ranges of IP sources, could be a very good traffic generator.
Once again, thank you!
Raimundo Santos
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