Hello, My recently acquired PC Engines Alix 3D3 [1] board running OpenBSD 5.5-stable suddenly disconnects from my local network after a random amount of time, typically 15-60 minutes. This happens consistently while there is a low but constant amount of network traffic (e.g. soundcard is used by a remote machine using sndiod).
Re-initializing the interface and running dhclient restores the connection: $ sudo ifconfig vr0 down $ sudo ifconfig vr0 up $ sudo dhclient vr0 The Alix is connected to a Wireless Gigabit Dualband 300N prefab router running dhcp. The router has been reliable so far and other machines do not suffer from any disconnections. Since this is a second-hand device I cannot rule out any hardware problems, although network connectivity is fine until it breaks. I will try some Linux distro soon and see if the same problem occurs. Searching the mailing lists does not show any similar issues. Below is some output from the Alix after disconnection while running tcpbench, not sure if it's useful: dmesg, ifconfig, netstat -i, netstat -s and tcpbench. [1] http://www.pcengines.ch/alix3d3.htm $ dmesg OpenBSD 5.5 (GENERIC) #0: Fri Apr 25 15:04:32 CEST 2014 r...@stable-55-i386.mtier.org:/binpatchng/work-binpatch55-i386/src/sys/arch/i386/compile/GENERIC cpu0: Geode(TM) Integrated Processor by AMD PCS ("AuthenticAMD" 586-class) 499 MHz cpu0: FPU,DE,PSE,TSC,MSR,CX8,SEP,PGE,CMOV,CFLUSH,MMX,MMXX,3DNOW2,3DNOW real mem = 259219456 (247MB) avail mem = 242675712 (231MB) mainbus0 at root bios0 at mainbus0: AT/286+ BIOS, date 02/11/09, BIOS32 rev. 0 @ 0xfaf90 apm0 at bios0: Power Management spec V1.2 (slowidle) pcibios0 at bios0: rev 2.1 @ 0xf0000/0xdfb4 pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdf20/144 (7 entries) pcibios0: bad IRQ table checksum pcibios0: PCI BIOS has 7 Interrupt Routing table entries pcibios0: PCI Exclusive IRQs: 5 10 11 pcibios0: no compatible PCI ICU found pcibios0: Warning, unable to fix up PCI interrupt routing pcibios0: PCI bus #0 is the last bus bios0: ROM list: 0xc0000/0x8000 0xc8000/0xa800 0xef000/0x1000! cpu0 at mainbus0: (uniprocessor) mtrr: K6-family MTRR support (2 registers) amdmsr0 at mainbus0 pci0 at mainbus0 bus 0: configuration mode 1 (bios) pchb0 at pci0 dev 1 function 0 "AMD Geode LX" rev 0x33 vga1 at pci0 dev 1 function 1 "AMD Geode LX Video" rev 0x00 wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) glxsb0 at pci0 dev 1 function 2 "AMD Geode LX Crypto" rev 0x00: RNG AES vr0 at pci0 dev 9 function 0 "VIA VT6105M RhineIII" rev 0x96: irq 11, address 00:0d:b9:2b:97:28 ukphy0 at vr0 phy 1: Generic IEEE 802.3u media interface, rev. 3: OUI 0x004063, model 0x0034 glxpcib0 at pci0 dev 15 function 0 "AMD CS5536 ISA" rev 0x03: rev 3, 32-bit 3579545Hz timer, watchdog, gpio, i2c gpio0 at glxpcib0: 32 pins iic0 at glxpcib0 maxtmp0 at iic0 addr 0x4c: lm86 pciide0 at pci0 dev 15 function 2 "AMD CS5536 IDE" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility wd0 at pciide0 channel 0 drive 0: <TS4GCF133> wd0: 1-sector PIO, LBA, 3823MB, 7831152 sectors wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 pciide0: channel 1 ignored (disabled) auglx0 at pci0 dev 15 function 3 "AMD CS5536 Audio" rev 0x01: irq 11, CS5536 AC97 ac97: codec id 0x414c4770 (Avance Logic ALC203 rev 0) ac97: codec features headphone, 20 bit DAC, 18 bit ADC, No 3D Stereo audio0 at auglx0 ohci0 at pci0 dev 15 function 4 "AMD CS5536 USB" rev 0x02: irq 5, version 1.0, legacy support ehci0 at pci0 dev 15 function 5 "AMD CS5536 USB" rev 0x02: irq 5 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "AMD EHCI root hub" rev 2.00/1.00 addr 1 isa0 at glxpcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo pckbc0 at isa0 port 0x60/5 pckbdprobe: reset response 0xfa pcppi0 at isa0 port 0x61 spkr0 at pcppi0 npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16 usb1 at ohci0: USB revision 1.0 uhub1 at usb1 "AMD OHCI root hub" rev 1.00/1.00 addr 1 uaudio0 at uhub1 port 1 configuration 1 interface 0 "Alesis io|2" rev 1.10/1.01 addr 2 uaudio0: audio rev 1.00, 0 mixer controls audio1 at uaudio0 umidi0 at uhub1 port 1 configuration 1 interface 3 "Alesis io|2" rev 1.10/1.01 addr 2 umidi0: (genuine USB-MIDI) umidi0: out=1, in=1 midi0 at umidi0: <USB MIDI I/F> uhub2 at uhub1 port 2 "ALCOR USB Hub 2.0" rev 2.00/7.02 addr 3 uhidev0 at uhub2 port 2 configuration 1 interface 0 "Primax Electronics USB Optical Mouse" rev 2.00/2.00 addr 4 uhidev0: iclass 3/1 ums0 at uhidev0: 3 buttons, Z dir wsmouse0 at ums0 mux 0 uhidev1 at uhub2 port 4 configuration 1 interface 0 "USB USB Keykoard" rev 1.10/1.10 addr 5 uhidev1: iclass 3/1 ukbd0 at uhidev1: 8 variable keys, 6 key codes wskbd0 at ukbd0: console keyboard, using wsdisplay0 uhidev2 at uhub2 port 4 configuration 1 interface 1 "USB USB Keykoard" rev 1.10/1.10 addr 5 uhidev2: iclass 3/0, 2 report ids uhid0 at uhidev2 reportid 1: input=2, output=0, feature=0 uhid1 at uhidev2 reportid 2: input=1, output=0, feature=0 vscsi0 at root scsibus0 at vscsi0: 256 targets softraid0 at root scsibus1 at softraid0: 256 targets root on wd0a (a6703cacf60979d8.a) swap on wd0b dump on wd0b $ ifconfig lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33192 priority: 0 groups: lo inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 inet 127.0.0.1 netmask 0xff000000 vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 lladdr 00:0d:b9:2b:97:28 priority: 0 groups: egress media: Ethernet autoselect (100baseTX full-duplex) status: active inet6 fe80::20d:b9ff:fe2b:9728%vr0 prefixlen 64 scopeid 0x1 inet 192.168.0.102 netmask 0xffffff00 broadcast 192.168.0.255 enc0: flags=0<> priority: 0 groups: enc status: active pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33192 priority: 0 groups: pflog $ netstat -i Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Colls lo0 33192 <Link> 0 0 0 0 0 lo0 33192 localhost/1 localhost 0 0 0 0 0 lo0 33192 fe80::%lo0/ fe80::1%lo0 0 0 0 0 0 lo0 33192 127/8 localhost 0 0 0 0 0 vr0 1500 <Link> 00:0d:b9:2b:97:28 36583463 0 54874042 0 0 vr0 1500 fe80::%vr0/ fe80::20d:b9ff:fe 36583463 0 54874042 0 0 vr0 1500 192.168.0/2 192.168.0.102 36583463 0 54874042 0 0 enc0* 0 <Link> 0 0 0 0 0 pflog0 33192 <Link> 0 0 0 0 0 $ netstat -s ip: 36583235 total packets received 0 bad header checksums 0 with size smaller than minimum 0 with data size < data length 0 with header length < data size 0 with data length < header length 0 with bad options 0 with incorrect version number 0 fragments received 0 fragments dropped (duplicates or out of space) 0 malformed fragments dropped 0 fragments dropped after timeout 0 packets reassembled ok 36583110 packets for this host 125 packets for unknown/unsupported protocol 0 packets forwarded 0 packets not forwardable 0 redirects sent 54875007 packets sent from this host 0 packets sent with fabricated ip header 0 output packets dropped due to no bufs, etc. 0 output packets discarded due to no route 0 output datagrams fragmented 0 fragments created 0 datagrams that can't be fragmented 0 fragment floods 0 packets with ip length > max ip packet size 0 tunneling packets that can't find gif 0 datagrams with bad address in header 0 input datagrams software-checksummed 0 output datagrams software-checksummed 0 multicast packets which we don't join icmp: 125 calls to icmp_error 0 errors not generated because old message was icmp 0 errors not generated because of rate limitation 0 messages with bad code fields 0 messages < minimum length 0 bad checksums 0 messages with bad length 0 echo requests to broadcast/multicast rejected 0 message responses generated igmp: 125 messages received 0 messages received with too few bytes 0 messages received with bad checksum 125 membership queries received 0 membership queries received with invalid field(s) 0 membership reports received 0 membership reports received with invalid field(s) 0 membership reports received for groups to which we belong 0 membership reports sent ipencap: 0 total input packets 0 total output packets 0 packets shorter than header shows 0 packets dropped due to policy 0 packets with possibly spoofed local addresses 0 packets were dropped due to full output queue 0 input bytes 0 output bytes 0 protocol family mismatches 0 attempts to use tunnel with unspecified endpoint(s) tcp: 54873881 packets sent 54873866 data packets (79457334560 bytes) 12 data packets (17376 bytes) retransmitted 0 fast retransmitted packets 1 ack-only packet (0 delayed) 0 URG only packets 0 window probe packets 0 window update packets 2 control packets 0 packets software-checksummed 36582009 packets received 36573758 acks (for 79455195864 bytes) 425 duplicate acks 0 acks for unsent data 0 acks for old data 0 packets (0 bytes) received in-sequence 0 completely duplicate packets (0 bytes) 0 old duplicate packets 0 packets with some duplicate data (0 bytes duplicated) 0 out-of-order packets (0 bytes) 0 packets (0 bytes) of data after window 0 window probes 7825 window update packets 0 packets received after close 0 discarded for bad checksums 0 discarded for bad header offset fields 0 discarded because packet too short 0 discarded for missing IPsec protection 0 discarded due to memory shortage 0 packets software-checksummed 0 bad/missing md5 checksums 0 good md5 checksums 1 connection request 0 connection accepts 1 connection established (including accepts) 11 connections closed (including 1 drop) 0 connections drained 0 embryonic connections dropped 36573759 segments updated rtt (of 29110700 attempts) 12 retransmit timeouts 1 connection dropped by rexmit timeout 0 persist timeouts 0 keepalive timeouts 0 keepalive probes sent 0 connections dropped by keepalive 14 correct ACK header predictions 0 correct data packet header predictions 0 PCB cache misses 0 ECN connections accepted 0 ECE packets received 0 CWR packets received 0 CE packets received 0 ECT packets sent 0 ECE packets sent 0 CWR packets sent cwr by fastrecovery: 11 cwr by timeout: 12 cwr by ecn: 0 0 bad connection attempts 0 SYN cache entries added 0 hash collisions 0 completed 0 aborted (no space to build PCB) 0 timed out 0 dropped due to overflow 0 dropped due to bucket overflow 0 dropped due to RST 0 dropped due to ICMP unreachable 0 SYN,ACKs retransmitted 0 duplicate SYNs received for entries already in the cache 0 SYNs dropped (no route or no space) 11 SACK recovery episodes 1309 segment rexmits in SACK recovery episodes 1895432 byte rexmits in SACK recovery episodes 1732 SACK options received 0 SACK options sent udp: 1101 datagrams received 0 with incomplete header 0 with bad data length field 0 with bad checksum 0 with no checksum 0 input packets software-checksummed 0 output packets software-checksummed 0 dropped due to no socket 75 broadcast/multicast datagrams dropped due to no socket 0 dropped due to missing IPsec protection 0 dropped due to full socket buffers 1026 delivered 1126 datagrams output 0 missed PCB cache esp: 0 input ESP packets 0 output ESP packets 0 packets from unsupported protocol families 0 packets shorter than header shows 0 packets dropped due to policy 0 packets for which no TDB was found 0 input packets that failed to be processed 0 packets with bad encryption received 0 packets that failed verification received 0 packets for which no XFORM was set in TDB received 0 packets were dropped due to full output queue 0 packets where counter wrapping was detected 0 possibly replayed packets received 0 packets with bad payload size or padding received 0 packets attempted to use an invalid TDB 0 packets got larger than max IP packet size 0 packets that failed crypto processing 0 input UDP encapsulated ESP packets 0 output UDP encapsulated ESP packets 0 UDP packets for non-encapsulating TDB received 0 input bytes 0 output bytes ah: 0 input AH packets 0 output AH packets 0 packets from unsupported protocol families 0 packets shorter than header shows 0 packets dropped due to policy 0 packets for which no TDB was found 0 input packets that failed to be processed 0 packets that failed verification received 0 packets for which no XFORM was set in TDB received 0 packets were dropped due to full output queue 0 packets where counter wrapping was detected 0 possibly replayed packets received 0 packets with bad authenticator length received 0 packets attempted to use an invalid TDB 0 packets got larger than max IP packet size 0 packets that failed crypto processing 0 input bytes 0 output bytes etherip: 0 packets shorter than header shows 0 packets were dropped due to full output queue 0 packets were dropped because of no interface/bridge information 0 packets dropped due to policy 0 packets dropped for other reasons 0 input ethernet-in-IP packets 0 output ethernet-in-IP packets 0 input bytes 0 output bytes ipcomp: 0 input IPCOMP packets 0 output IPCOMP packets 0 packets from unsupported protocol families 0 packets shorter than header shows 0 packets dropped due to policy 0 packets for which no TDB was found 0 input packets that failed to be processed 0 packets for which no XFORM was set in TDB received 0 packets were dropped due to full output queue 0 packets where counter wrapping was detected 0 packets attempted to use an invalid TDB 0 packets got larger than max IP packet size 0 packets that failed (de)compression processing 0 packets less than minimum compression length 0 input bytes 0 output bytes carp: 0 packets received (IPv4) 0 packets received (IPv6) 0 packets discarded for bad interface 0 packets discarded for wrong TTL 0 packets shorter than header 0 discarded for bad checksums 0 discarded packets with a bad version 0 discarded because packet too short 0 discarded for bad authentication 0 discarded for unknown vhid 0 discarded because of a bad address list 0 packets sent (IPv4) 0 packets sent (IPv6) 0 send failed due to mbuf memory error 0 transitions to master pfsync: 0 packets received (IPv4) 0 packets received (IPv6) 0 packets discarded for bad interface 0 packets discarded for bad ttl 0 packets shorter than header 0 packets discarded for bad version 0 packets discarded for bad HMAC 0 packets discarded for bad action 0 packets discarded for short packet 0 states discarded for bad values 0 stale states 0 failed state lookup/inserts 0 packets sent (IPv4) 0 packets sent (IPv6) 0 send failed due to mbuf memory error 0 send error divert: 0 total packets received 0 dropped due to no socket 0 dropped due to full socket buffers 0 packets output 0 errors pflow: 0 flows sent 0 packets sent 0 send failed due to mbuf memory error 0 send error ip6: 1 total packet received 0 with size smaller than minimum 0 with data size < data length 0 with bad options 0 with incorrect version number 0 fragments received 0 fragments dropped (duplicates or out of space) 0 fragments dropped after timeout 0 fragments that exceeded limit 0 packets reassembled ok 0 packets for this host 0 packets forwarded 0 packets not forwardable 0 redirects sent 9 packets sent from this host 0 packets sent with fabricated ip header 0 output packets dropped due to no bufs, etc. 0 output packets discarded due to no route 0 output datagrams fragmented 0 fragments created 0 datagrams that can't be fragmented 0 packets that violated scope rules 0 multicast packets which we don't join Input packet histogram: ICMP6: 1 Mbuf statistics: 0 one mbufs 1 one ext mbuf 0 two or more ext mbufs 0 tunneling packets that can't find gif 0 packets discarded due to too many headers 0 failures of source address selection 0 forward cache hit 0 forward cache miss divert6: 0 total packets received 0 dropped due to no socket 0 dropped due to full socket buffers 0 packets output 0 errors icmp6: 0 calls to icmp6_error 0 errors not generated because old message was icmp6 or so 0 errors not generated because of rate limitation Output packet histogram: multicast listener report: 8 neighbor solicitation: 1 0 messages with bad code fields 0 messages < minimum length 0 bad checksums 0 messages with bad length Input packet histogram: neighbor advertisement: 1 Histogram of error messages to be generated: 0 no route 0 administratively prohibited 0 beyond scope 0 address unreachable 0 port unreachable 0 packet too big 0 time exceed transit 0 time exceed reassembly 0 erroneous header field 0 unrecognized next header 0 unrecognized option 0 redirect 0 unknown 0 message responses generated 0 messages with too many ND options 0 messages with bad ND options 0 bad neighbor solicitation messages 0 bad neighbor advertisement messages 0 bad router solicitation messages 0 bad router advertisement messages 0 bad redirect messages 0 path MTU changes pim6: 0 messages received 0 messages received with too few bytes 0 messages received with bad checksum 0 messages received with bad version 0 registers received 0 bad registers received 0 registers sent rip6: 0 messages received 0 checksum calculations on inbound 0 messages with bad checksum 0 messages dropped due to no socket 0 multicast messages dropped due to no socket 0 messages dropped due to full socket buffers 0 delivered 0 datagrams output $ tcpbench -vv 192.168.0.101 elapsed_ms bytes mbps bwidth Trying [192.168.0.101]:12345 1000 10648592 85.189 100.00% Conn: 1 Mbps: 85.189 Peak Mbps: 85.189 Avg Mbps: 85.189 2000 10622528 84.980 100.00% Conn: 1 Mbps: 84.980 Peak Mbps: 85.189 Avg Mbps: 84.980 3000 10618184 84.945 100.00% Conn: 1 Mbps: 84.945 Peak Mbps: 85.189 Avg Mbps: 84.945 4000 10616736 84.934 100.00% Conn: 1 Mbps: 84.934 Peak Mbps: 85.189 Avg Mbps: 84.934 5000 10615288 84.922 100.00% Conn: 1 Mbps: 84.922 Peak Mbps: 85.189 Avg Mbps: 84.922 6001 10482184 83.857 100.00% Conn: 1 Mbps: 83.857 Peak Mbps: 85.189 Avg Mbps: 83.857 7001 7548984 60.392 100.00% Conn: 1 Mbps: 60.392 Peak Mbps: 85.189 Avg Mbps: 60.392 8001 6047168 48.426 100.00% Conn: 1 Mbps: 48.426 Peak Mbps: 85.189 Avg Mbps: 48.426 9002 8759392 70.075 100.00% Conn: 1 Mbps: 70.075 Peak Mbps: 85.189 Avg Mbps: 70.075 10003 10557376 84.375 100.00% Conn: 1 Mbps: 84.375 Peak Mbps: 85.189 Avg Mbps: 84.375 11015 10670904 84.355 100.00% Conn: 1 Mbps: 84.355 Peak Mbps: 85.189 Avg Mbps: 84.355 12005 10429936 84.368 100.00% Conn: 1 Mbps: 84.368 Peak Mbps: 85.189 Avg Mbps: 84.368 13005 10545744 84.450 100.00% Conn: 1 Mbps: 84.450 Peak Mbps: 85.189 Avg Mbps: 84.450 14005 10539592 84.317 100.00% Conn: 1 Mbps: 84.317 Peak Mbps: 85.189 Avg Mbps: 84.317 15005 10545632 84.365 100.00% Conn: 1 Mbps: 84.365 Peak Mbps: 85.189 Avg Mbps: 84.365 16005 10534784 84.363 100.00% Conn: 1 Mbps: 84.363 Peak Mbps: 85.189 Avg Mbps: 84.363 17006 10553904 84.431 100.00% (...) Conn: 1 Mbps: 84.318 Peak Mbps: 86.210 Avg Mbps: 84.318 7559538 10552320 84.419 100.00% Conn: 1 Mbps: 84.419 Peak Mbps: 86.210 Avg Mbps: 84.419 7560539 10549504 84.396 100.00% Conn: 1 Mbps: 84.396 Peak Mbps: 86.210 Avg Mbps: 84.396 7561539 10545408 84.363 100.00% Conn: 1 Mbps: 84.363 Peak Mbps: 86.210 Avg Mbps: 84.363 7562539 10533656 84.354 100.00% Conn: 1 Mbps: 84.354 Peak Mbps: 86.210 Avg Mbps: 84.354 7563545 5291776 42.082 100.00% Conn: 1 Mbps: 42.082 Peak Mbps: 86.210 Avg Mbps: 42.082 7564560 0 0.000 nan% Conn: 1 Mbps: 0.000 Peak Mbps: 86.210 Avg Mbps: 0.000 7565575 0 0.000 nan% Conn: 1 Mbps: 0.000 Peak Mbps: 86.210 Avg Mbps: 0.000 7566590 0 0.000 nan% Conn: 1 Mbps: 0.000 Peak Mbps: 86.210 Avg Mbps: 0.000 7567605 0 0.000 nan% Conn: 1 Mbps: 0.000 Peak Mbps: 86.210 Avg Mbps: 0.000 7568621 0 0.000 nan% Conn: 1 Mbps: 0.000 Peak Mbps: 86.210 Avg Mbps: 0.000 7569636 0 0.000 nan% (...) Best, -- Erwin
