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Date: Thu, 27 Sep 2012 12:50:57 +0100 From: Chris Clayton <chris2553@...glemail.com> To: Chris Clayton <chris2553@...glemail.com> CC: Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org, gpiez@....de Subject: Re: Possible networking regression in 3.6.0 Just for information - I've pulled Linus' tree this morning and the problem is still present. Also, Gunther Piaz has reported, via the bugzilla entry, that he too has hit this regression. On 09/22/12 07:26, Chris Clayton wrote: > I guess you network developer folks are either very busy or this > regression is proving a bit troublesome to identify, so I've opened a > bugzilla report to keep track of it. The report number is 47761. > > Chris > > On 09/19/12 16:26, Chris Clayton wrote: >>> >>> It would help to have some traffic sample, maybe. >>> >>> Especially if the problem is not easily reproductible for us. >>> >> >> OK, I've used an netsniff-ng to capture the traffic on all interfaces on >> the host (that would be tap0 and eth0, I guess) whilst attempting to >> ping the router from the WinXP KVM client. The result is a pcap file >> that I processed with tcpdump to produce: >> >> reading from file net-trace.pcap, link-type EN10MB (Ethernet) >> 14:56:31.406336 ARP, Request who-has 192.168.200.254 tell 192.168.200.1, >> length 28 >> 0x0000: 0001 0800 0604 0001 5254 0c3b 1728 c0a8 >> 0x0010: c801 0000 0000 0000 c0a8 c8fe >> 14:56:31.406357 ARP, Reply 192.168.200.254 is-at 46:83:93:8f:f0:7e, >> length 28 >> 0x0000: 0001 0800 0604 0002 4683 938f f07e c0a8 >> 0x0010: c8fe 5254 0c3b 1728 c0a8 c801 >> 14:56:31.406534 IP 192.168.200.1 > 192.168.0.1: ICMP echo request, id >> 512, seq 4352, length 40 >> 0x0000: 4500 003c 0195 0000 8001 efd8 c0a8 c801 >> 0x0010: c0a8 0001 0800 3a5c 0200 1100 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:31.406566 ARP, Request who-has 192.168.0.1 tell 192.168.0.40, >> length 28 >> 0x0000: 0001 0800 0604 0001 5c9a d85c 6331 c0a8 >> 0x0010: 0028 0000 0000 0000 c0a8 0001 >> 14:56:31.410830 ARP, Reply 192.168.0.1 is-at 00:1f:33:80:09:44, length 46 >> 0x0000: 0001 0800 0604 0002 001f 3380 0944 c0a8 >> 0x0010: 0001 5c9a d85c 6331 c0a8 0028 c0a8 0001 >> 0x0020: e000 0001 1164 ee9b 0000 0000 4500 >> 14:56:31.410851 IP 192.168.0.40 > 192.168.0.1: ICMP echo request, id >> 512, seq 4352, length 40 >> 0x0000: 4500 003c 0195 0000 7f01 b8b2 c0a8 0028 >> 0x0010: c0a8 0001 0800 3a5c 0200 1100 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:31.414474 IP 192.168.0.1 > 192.168.0.40: ICMP echo reply, id 512, >> seq 4352, length 40 >> 0x0000: 4500 003c cf4f 0000 ff01 6af7 c0a8 0001 >> 0x0010: c0a8 0028 0000 425c 0200 1100 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:36.404781 ARP, Request who-has 192.168.0.40 tell 192.168.0.1, >> length 46 >> 0x0000: 0001 0800 0604 0001 001f 3380 0944 c0a8 >> 0x0010: 0001 0000 0000 0000 c0a8 0028 c0a8 0001 >> 0x0020: c0a8 0028 0000 425c 0200 1100 6162 >> 14:56:36.404806 ARP, Reply 192.168.0.40 is-at 5c:9a:d8:5c:63:31, >> length 28 >> 0x0000: 0001 0800 0604 0002 5c9a d85c 6331 c0a8 >> 0x0010: 0028 001f 3380 0944 c0a8 0001 >> 14:56:36.689750 IP 192.168.200.1 > 192.168.0.1: ICMP echo request, id >> 512, seq 4608, length 40 >> 0x0000: 4500 003c 0196 0000 8001 efd7 c0a8 c801 >> 0x0010: c0a8 0001 0800 395c 0200 1200 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:36.689774 IP 192.168.0.40 > 192.168.0.1: ICMP echo request, id >> 512, seq 4608, length 40 >> 0x0000: 4500 003c 0196 0000 7f01 b8b1 c0a8 0028 >> 0x0010: c0a8 0001 0800 395c 0200 1200 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:36.693330 IP 192.168.0.1 > 192.168.0.40: ICMP echo reply, id 512, >> seq 4608, length 40 >> 0x0000: 4500 003c cf50 0000 ff01 6af6 c0a8 0001 >> 0x0010: c0a8 0028 0000 415c 0200 1200 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:42.189424 IP 192.168.200.1 > 192.168.0.1: ICMP echo request, id >> 512, seq 4864, length 40 >> 0x0000: 4500 003c 0197 0000 8001 efd6 c0a8 c801 >> 0x0010: c0a8 0001 0800 385c 0200 1300 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:42.189447 IP 192.168.0.40 > 192.168.0.1: ICMP echo request, id >> 512, seq 4864, length 40 >> 0x0000: 4500 003c 0197 0000 7f01 b8b0 c0a8 0028 >> 0x0010: c0a8 0001 0800 385c 0200 1300 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:42.193029 IP 192.168.0.1 > 192.168.0.40: ICMP echo reply, id 512, >> seq 4864, length 40 >> 0x0000: 4500 003c cf51 0000 ff01 6af5 c0a8 0001 >> 0x0010: c0a8 0028 0000 405c 0200 1300 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:47.689414 IP 192.168.200.1 > 192.168.0.1: ICMP echo request, id >> 512, seq 5120, length 40 >> 0x0000: 4500 003c 0198 0000 8001 efd5 c0a8 c801 >> 0x0010: c0a8 0001 0800 375c 0200 1400 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:47.689439 IP 192.168.0.40 > 192.168.0.1: ICMP echo request, id >> 512, seq 5120, length 40 >> 0x0000: 4500 003c 0198 0000 7f01 b8af c0a8 0028 >> 0x0010: c0a8 0001 0800 375c 0200 1400 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> 14:56:47.693661 IP 192.168.0.1 > 192.168.0.40: ICMP echo reply, id 512, >> seq 5120, length 40 >> 0x0000: 4500 003c cf52 0000 ff01 6af4 c0a8 0001 >> 0x0010: c0a8 0028 0000 3f5c 0200 1400 6162 6364 >> 0x0020: 6566 6768 696a 6b6c 6d6e 6f70 7172 7374 >> 0x0030: 7576 7761 6263 6465 6667 6869 >> >> Is this what you asked for? >> >> Chris >> > > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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