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Date: Wed, 14 Jan 2015 17:18:49 +0200 From: Or Gerlitz <ogerlitz@...lanox.com> To: tom Herbert <therbert@...gle.com>, thomas Graf <tgraf@...g.ch>, "Marcelo Leitner" <mleitner@...hat.com>, Jesse Gross <jesse@...ira.com> CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: non-OVS based vxlan config broken on 3.19-rc ?! Guys, just realized that non-OVS based vxlan config is broken with 3.19-rc... I see that it works for me on 3.18.2 and breaks on 3.19-rc3 (Linus tree). Tested over mlx4 (both offloaded and non offloaded modes) and igb, see below the simplest form I can see it breaks on 3.19-rcand works on 3.18 Looking on tcpdump and stats, the arp reply arrives to the 3.19-rc host NIC driver but is dropped along the stack beforehanded to the vxlan driver, not sure where and why... Or. > $ tcpdump -nni vxlan42 -e > 16:48:40.961852 8e:c2:13:4f:97:6e > ff:ff:ff:ff:ff:ff, ethertype ARP > (0x0806), length 42: Request who-has 192.168.92.18 tell 192.168.92.17, > length 28 > 16:48:41.961864 8e:c2:13:4f:97:6e > ff:ff:ff:ff:ff:ff, ethertype ARP > (0x0806), length 42: Request who-has 192.168.92.18 tell 192.168.92.17, > length 28 > 16:48:42.979948 8e:c2:13:4f:97:6e > ff:ff:ff:ff:ff:ff, ethertype ARP > (0x0806), length 42: Request who-has 192.168.92.18 tell 192.168.92.17, > length 28 > > $ tcpdump -nni eth3 -e > 16:48:46.993870 00:02:c9:e9:bf:32 > 01:00:5e:00:00:2a, ethertype IPv4 > (0x0800), length 92: 192.168.31.17.33434 > 239.0.0.42.4789: UDP, length 50 > 16:48:46.993905 f4:52:14:01:da:82 > 00:02:c9:e9:bf:32, ethertype IPv4 > (0x0800), length 92: 192.168.31.18.39155 > 192.168.31.17.4789: UDP, > length 50 > 16:48:47.993855 00:02:c9:e9:bf:32 > 01:00:5e:00:00:2a, ethertype IPv4 > (0x0800), length 92: 192.168.31.17.33434 > 239.0.0.42.4789: UDP, length 50 > 16:48:47.993881 f4:52:14:01:da:82 > 00:02:c9:e9:bf:32, ethertype IPv4 > (0x0800), length 92: 192.168.31.18.39155 > 192.168.31.17.4789: UDP, > length 50 > > $ nstat > Wed Jan 14 16:54:04 2015 > > #kernel > IpInReceives 2 0.0 > IpInDelivers 2 0.0 > IpOutRequests 4 0.0 > IcmpOutErrors 2 0.0 > IcmpOutEchoReps 2 0.0 > IcmpMsgOutType8 2 0.0 > TcpInSegs 1 0.0 > TcpOutSegs 1 0.0 > UdpInDatagrams 1 0.0 > TcpExtTCPPureAcks 1 0.0 > TcpExtTCPOrigDataSent 1 0.0 > IpExtOutMcastPkts 1 0.0 > IpExtInOctets 124 0.0 > IpExtOutOctets 670 0.0 > IpExtOutMcastOctets 78 0.0 > IpExtInNoECTPkts 2 0.0 > > Every 1.0s: netstat -s -w > Wed Jan 14 16:54:56 2015 > > Ip: > 1077125083 total packets received > 182 with invalid addresses > 0 forwarded > 0 incoming packets discarded > 1077124621 incoming packets delivered > 545614475 requests sent out > Icmp: > 67936 ICMP messages received > 60 input ICMP message failed. > ICMP input histogram: > destination unreachable: 3319 > echo requests: 528 > echo replies: 64089 > 71890 ICMP messages sent > 0 ICMP messages failed > ICMP output histogram: > destination unreachable: 3542 > echo request: 67821 > echo replies: 527 > IcmpMsg: > InType0: 64089 > InType3: 3319 > InType8: 528 > OutType0: 527 > OutType3: 3542 > OutType8: 67821 > UdpLite: > IpExt: > InMcastPkts: 827 > OutMcastPkts: 2993 > InBcastPkts: 1424 > InOctets: 2102729994314 > OutOctets: 35397269627 > InMcastOctets: 31854 > OutMcastOctets: 237154 > InBcastOctets: 453473 > InNoECTPkts: 1440876685 # host A with IP address 192.168.31.17 IP=ip # mlx4 ETH=eth0 $IP link del vxlan42 $IP link add vxlan42 type vxlan id 42 group 239.0.0.42 ttl 10 dstport 4789 dev $ETH $IP link set vxlan42 up ifconfig vxlan42 192.168.92.17/24 ifconfig vxlan42 mtu 1450 # plain ping ping 192.168.31.18 -c 2 # encaped ping <-- BREAKS ping 192.168.92.18 -c 2 # host B with IP address 192.168.31.18 IP=ip # mlx4 ETH=eth0 $IP link del vxlan42 $IP link add vxlan42 type vxlan id 42 group 239.0.0.42 ttl 10 dstport 4789 dev $ETH $IP link set vxlan42 up ifconfig vxlan42 192.168.92.18/24 ifconfig vxlan42 mtu 1450 ping 192.168.31.17 -c 2 ping 192.168.92.17 -c 2 -- 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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