IPv6 - bad neighbor solicitation messages
Li, Qing
qing.li at bluecoat.com
Fri Dec 11 03:24:49 UTC 2009
I haven't made any significant changes in the IPv6 code
for 3 months now. Could you please get a packet capture and
email it to me?
Thanks,
-- Qing
________________________________
From: owner-freebsd-stable at freebsd.org on behalf of Tom Pusateri
Sent: Thu 12/10/2009 7:15 PM
To: freebsd-stable at freebsd.org
Subject: IPv6 - bad neighbor solicitation messages
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=40+8+8 bytes) 2610:28:1800:4001:225:ff:fef1:7305 --> 2610:28:1800:4001:20e:cff:fe9f:faad
Request timeout for icmp_seq=0
Request timeout for icmp_seq=1
Request timeout for icmp_seq=2
Request timeout for icmp_seq=3
16 bytes from 2610:28:1800:4001:20e:cff:fe9f:faad, icmp_seq=4 hlim=63 time=0.784 ms
Request timeout for icmp_seq=5
Request timeout for icmp_seq=6
Request timeout for icmp_seq=7
Request timeout for icmp_seq=8
16 bytes from 2610:28:1800:4001:20e:cff:fe9f:faad, icmp_seq=9 hlim=63 time=0.633 ms
Request timeout for icmp_seq=10
Request timeout for icmp_seq=11
Request timeout for icmp_seq=12
Request timeout for icmp_seq=13
16 bytes from 2610:28:1800:4001:20e:cff:fe9f:faad, icmp_seq=14 hlim=63 time=0.654 ms
Request timeout for icmp_seq=15
^C
--- crag.foo.com ping6 statistics ---
17 packets transmitted, 3 packets received, 82.4% packet loss
round-trip min/avg/max/std-dev = 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 !=0
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= 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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