Date: Thu, 10 Dec 2009 22:15:50 -0500 From: Tom Pusateri <pusateri@bangj.com> To: freebsd-stable@freebsd.org Subject: IPv6 - bad neighbor solicitation messages Message-ID: <3E18B7A0-9391-47A2-B52D-24E44DDF1A33@bangj.com>
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I'm having intermittent IPv6 issues on one FreeBSD 8-stable box. I've tried to ping6 the FreeBSD-8 stable (crag) (as of 12/9/09) from = snow leopard (glow) and from a freebsd 7.2 box (gw). I've tried replacing the fxp0 interface in the FreeBSD-8 stable box with = an em0 interface and it works with the FreeBSD 7.2 box but the same = problem from the Snow Leopard box. The bad neighbor solicitation messages keep increasing with the IPv6 = pings. Any other thing I can collect to troubleshoot? Thanks, Tom glow pusateri$ ping6 crag PING6(56=3D40+8+8 bytes) 2610:28:1800:4001:225:ff:fef1:7305 --> = 2610:28:1800:4001:20e:cff:fe9f:faad Request timeout for icmp_seq=3D0 Request timeout for icmp_seq=3D1 Request timeout for icmp_seq=3D2 Request timeout for icmp_seq=3D3 16 bytes from 2610:28:1800:4001:20e:cff:fe9f:faad, icmp_seq=3D4 hlim=3D63 = time=3D0.784 ms Request timeout for icmp_seq=3D5 Request timeout for icmp_seq=3D6 Request timeout for icmp_seq=3D7 Request timeout for icmp_seq=3D8 16 bytes from 2610:28:1800:4001:20e:cff:fe9f:faad, icmp_seq=3D9 hlim=3D63 = time=3D0.633 ms Request timeout for icmp_seq=3D10 Request timeout for icmp_seq=3D11 Request timeout for icmp_seq=3D12 Request timeout for icmp_seq=3D13 16 bytes from 2610:28:1800:4001:20e:cff:fe9f:faad, icmp_seq=3D14 hlim=3D63= time=3D0.654 ms Request timeout for icmp_seq=3D15 ^C --- crag.foo.com ping6 statistics --- 17 packets transmitted, 3 packets received, 82.4% packet loss round-trip min/avg/max/std-dev =3D 0.633/0.690/0.784/0.067 ms tcp: 153 packets sent 146 data packets (31776 bytes) 3 data packets (240 bytes) retransmitted 1 data packet unnecessarily retransmitted 0 resends initiated by MTU discovery 4 ack-only packets (2 delayed) 0 URG only packets 0 window probe packets 0 window update packets 0 control packets 196 packets received 137 acks (for 31777 bytes) 6 duplicate acks 0 acks for unsent data 52 packets (4277 bytes) received in-sequence 0 completely duplicate packets (0 bytes) 0 old duplicate packets 0 packets with some dup. data (0 bytes duped) 0 out-of-order packets (0 bytes) 0 packets (0 bytes) of data after window 0 window probes 0 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 due to memory problems 0 connection requests 1 connection accept 0 bad connection attempts 0 listen queue overflows 0 ignored RSTs in the windows 1 connection established (including accepts) 4 connections closed (including 0 drops) 0 connections updated cached RTT on close 0 connections updated cached RTT variance on close 0 connections updated cached ssthresh on close 0 embryonic connections dropped 137 segments updated rtt (of 73 attempts) 2 retransmit timeouts 0 connections dropped by rexmit timeout 0 persist timeouts 0 connections dropped by persist timeout 0 Connections (fin_wait_2) dropped because of timeout 0 keepalive timeouts 0 keepalive probes sent 0 connections dropped by keepalive 0 correct ACK header predictions 50 correct data packet header predictions 1 syncache entry added 0 retransmitted 1 dupsyn 0 dropped 1 completed 0 bucket overflow 0 cache overflow 0 reset 0 stale 0 aborted 0 badack 0 unreach 0 zone failures 1 cookie sent 0 cookies received 1 SACK recovery episode 1 segment rexmit in SACK recovery episodes 48 byte rexmits in SACK recovery episodes 7 SACK options (SACK blocks) received 0 SACK options (SACK blocks) sent 0 SACK scoreboard overflow 0 packets with ECN CE bit set 0 packets with ECN ECT(0) bit set 0 packets with ECN ECT(1) bit set 0 successful ECN handshakes 0 times ECN reduced the congestion window udp: 169 datagrams received 0 with incomplete header 0 with bad data length field 0 with bad checksum 0 with no checksum 1 dropped due to no socket 23 broadcast/multicast datagrams undelivered 0 dropped due to full socket buffers 0 not for hashed pcb 145 delivered 134 datagrams output 0 times multicast source filter matched sctp: 0 input packets 0 datagrams 0 packets that had data 0 input SACK chunks 0 input DATA chunks 0 duplicate DATA chunks 0 input HB chunks 0 HB-ACK chunks 0 input ECNE chunks 0 input AUTH chunks 0 chunks missing AUTH 0 invalid HMAC ids received 0 invalid secret ids received 0 auth failed 0 fast path receives all one chunk 0 fast path multi-part data 0 output packets 0 output SACKs 0 output DATA chunks 0 retransmitted DATA chunks 0 fast retransmitted DATA chunks 0 FR's that happened more than once to same chunk 0 intput HB chunks 0 output ECNE chunks 0 output AUTH chunks 0 ip_output error counter Packet drop statistics: 0 from middle box 0 from end host 0 with data 0 non-data, non-endhost 0 non-endhost, bandwidth rep only 0 not enough for chunk header 0 not enough data to confirm 0 where process_chunk_drop said break 0 failed to find TSN 0 attempt reverse TSN lookup 0 e-host confirms zero-rwnd 0 midbox confirms no space 0 data did not match TSN 0 TSN's marked for Fast Retran Timeouts: 5 iterator timers fired 0 T3 data time outs 0 window probe (T3) timers fired 0 INIT timers fired 0 sack timers fired 0 shutdown timers fired 0 heartbeat timers fired 0 a cookie timeout fired 0 an endpoint changed its cookiesecret 0 PMTU timers fired 0 shutdown ack timers fired 0 shutdown guard timers fired 0 stream reset timers fired 0 early FR timers fired 0 an asconf timer fired 0 auto close timer fired 0 asoc free timers expired 0 inp free timers expired 0 packet shorter than header 0 checksum error 0 no endpoint for port 0 bad v-tag 0 bad SID 0 no memory 0 number of multiple FR in a RTT window 0 RFC813 allowed sending 0 RFC813 does not allow sending 0 times max burst prohibited sending 0 look ahead tells us no memory in interface 0 numbers of window probes sent 0 times an output error to clamp down on next user send 0 times sctp_senderrors were caused from a user 0 number of in data drops due to chunk limit reached 0 number of in data drops due to rwnd limit reached 0 times a ECN reduced the cwnd 0 used express lookup via vtag 0 collision in express lookup 0 times the sender ran dry of user data on primary 0 same for above 0 sacks the slow way 0 window update only sacks sent 0 sends with sinfo_flags !=3D0 0 unordered sends 0 sends with EOF flag set 0 sends with ABORT flag set 0 times protocol drain called 0 times we did a protocol drain 0 times recv was called with peek 0 cached chunks used 0 cached stream oq's used 0 unread messages abandonded by close 0 send burst avoidance, already max burst inflight to net 0 send cwnd full avoidance, already max burst inflight to net 0 number of map array over-runs via fwd-tsn's ip: 333 total packets received 0 bad header checksums 0 with size smaller than minimum 0 with data size < data length 0 with ip length > max ip packet size 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 (dup or out of space) 0 fragments dropped after timeout 0 packets reassembled ok 329 packets for this host 0 packets for unknown/unsupported protocol 0 packets forwarded (0 packets fast forwarded) 4 packets not forwardable 0 packets received for unknown multicast group 0 redirects sent 258 packets sent from this host 1 packet 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 tunneling packets that can't find gif 0 datagrams with bad address in header icmp: 1 call to icmp_error 0 errors not generated in response to an icmp message Output histogram: echo reply: 8 destination unreachable: 1 0 messages with bad code fields 0 messages less than the minimum length 0 messages with bad checksum 0 messages with bad length 0 multicast echo requests ignored 0 multicast timestamp requests ignored Input histogram: echo reply: 2 echo: 8 8 message responses generated 0 invalid return addresses 0 no return routes ICMP address mask responses are disabled igmp: 0 messages received 0 messages received with too few bytes 0 messages received with wrong TTL 0 messages received with bad checksum 0 V1/V2 membership queries received 0 V3 membership queries received 0 membership queries received with invalid field(s) 0 general queries received 0 group queries received 0 group-source queries received 0 group-source queries dropped 0 membership reports received 0 membership reports received with invalid field(s) 0 membership reports received for groups to which we belong 0 V3 reports received without Router Alert 2 membership reports sent ip6: 185 total packets 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 (dup or out of space) 0 fragments dropped after timeout 0 fragments that exceeded limit 0 packets reassembled ok 53 packets for this host 0 packets forwarded 0 packets not forwardable 0 redirects sent 118 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 3 multicast packets which we don't join Input histogram: UDP: 46 ICMP6: 139 Mbuf statistics: 29 one mbuf two or more mbuf: lo0=3D 24 132 one ext mbuf 0 two or more ext mbuf 0 packets whose headers are not continuous 0 tunneling packets that can't find gif 0 packets discarded because of too many headers 0 failures of source address selection Source addresses selection rule applied: 43 first candidate 5 same address 35 appropriate scope icmp6: 0 calls to icmp6_error 0 errors not generated in response to an icmp6 message 0 errors not generated because of rate limitation Output histogram: echo: 4 echo reply: 21 router solicitation: 3 neighbor solicitation: 6 neighbor advertisement: 30 MLDv2 listener report: 12 0 messages with bad code fields 0 messages < minimum length 0 bad checksums 0 messages with bad length Input histogram: echo: 21 echo reply: 4 router advertisement: 14 neighbor solicitation: 69 neighbor advertisement: 3 redirect: 25 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 21 message responses generated 0 messages with too many ND options 0 messages with bad ND options 39 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 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
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