Date: Fri, 15 Jan 2010 11:35:01 -0800 (PST) From: alan bryan <alan.bryan@yahoo.com> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-stable@freebsd.org Subject: Re: General problems with checksums (txcsum/rxcsum) on FreeBSD 8.0? Message-ID: <659970.14031.qm@web50507.mail.re2.yahoo.com> In-Reply-To: <81046D84-0BF4-4F3C-A262-B28A39F9D4A0@mac.com>
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=0A=0A--- On Fri, 1/15/10, Chuck Swiger <cswiger@mac.com> wrote:=0A=0A> Fro=
m: Chuck Swiger <cswiger@mac.com>=0A> Subject: Re: General problems with ch=
ecksums (txcsum/rxcsum) on FreeBSD 8.0?=0A> To: "alan bryan" <alan.bryan@ya=
hoo.com>=0A> Cc: freebsd-stable@freebsd.org=0A> Date: Friday, January 15, 2=
010, 11:21 AM=0A> Hi--=0A> =0A> On Jan 15, 2010, at 11:12 AM, alan bryan wr=
ote:=0A> [ ... ]=0A> > I'm currently sifting through a tcpdump in wireshark=
=0A> and there are all sorts of messages in there about checksums=0A> being=
incorrect - both TCP and UDP.=0A> =0A> If you run tcpdump on a machine, it=
normally will receive=0A> the traffic being sent from that machine before =
the=0A> checksums are computed, especially if HW checksumming is=0A> being =
used.=A0 For reliable detection of these problems,=0A> you need to look at =
the traffic either on a hub or via the=0A> monitoring or span port of a sma=
rt switch, although simply=0A> glancing at the checksum stats from "netstat=
-s" on both=0A> sides should indicate whether significant error rates are=
=0A> happening.=0A> =0A> Regards,=0A> -- =0A> -Chuck=0A=0A=0AAh - thanks fo=
r the explanation as I'm new to tcpdump/wireshark. Need to learn more about=
those tools still.=0A=0A=0A=0AWatching "systat -ip 1" gives results like:=
=0A=0A /0 /1 /2 /3 /4 /5 /6 /7 /8 /9 =
/10=0A Load Average |||||=0A=0A IP Input =
IP Output=0A 4534 total packets received 4395 total pack=
ets sent=0A 0 - with bad checksums 4395 - generated locally=
=0A 0 - too short for header 0 - output drops=0A 0 =
- too short for data 42 output fragments generated=0A 0 -=
with invalid hlen 0 - fragmentation failed=0A 0 - with=
invalid length 0 destinations unreachable=0A 0 - with in=
valid version 0 packets output via raw IP=0A 0 - jumbogram=
s=0A 84 total fragments received UDP Statistics=0A 0=
- fragments dropped 3989 total input packets=0A 0 - fragm=
ents timed out 0 - too short for header=0A 14 - packets re=
assembled ok 0 - invalid checksum=0A 0 packets forwarded =
0 - no checksum=0A 0 - unreachable dests 0 =
- invalid length=0A 0 - redirects generated 0 - no socket=
for dest port=0A 0 option errors 0 - no socket f=
or broadcast=0A 0 unwanted multicasts 0 - socket buffer=
full=0A 4464 delivered to upper layer 3989 total output packets=
=0A=0A=0AThe total IP packets for this box should normally be in the hundre=
ds per second - it stays constant at this 4K level. =0A=0AAnd the matching=
netstat -s:=0A=0Atcp:=0A=0947312791 packets sent=0A=09=0928828783 data pac=
kets (26317159806 bytes)=0A=09=09206 data packets (633246 bytes) retransmit=
ted=0A=09=0911 data packets unnecessarily retransmitted=0A=09=090 resends i=
nitiated by MTU discovery=0A=09=0912364262 ack-only packets (944193 delayed=
)=0A=09=090 URG only packets=0A=09=092518 window probe packets=0A=09=093212=
717 window update packets=0A=09=092903587 control packets=0A=0959176152 pac=
kets received=0A=09=0934785356 acks (for 26320662084 bytes)=0A=09=091849829=
duplicate acks=0A=09=090 acks for unsent data=0A=09=0939787782 packets (24=
426616075 bytes) received in-sequence=0A=09=09601 completely duplicate pack=
ets (14975 bytes)=0A=09=090 old duplicate packets=0A=09=090 packets with so=
me dup. data (0 bytes duped)=0A=09=09101 out-of-order packets (114828 bytes=
)=0A=09=092 packets (0 bytes) of data after window=0A=09=090 window probes=
=0A=09=094411949 window update packets=0A=09=0976 packets received after cl=
ose=0A=09=090 discarded for bad checksums=0A=09=090 discarded for bad heade=
r offset fields=0A=09=090 discarded because packet too short=0A=09=090 disc=
arded due to memory problems=0A=09905931 connection requests=0A=091098039 c=
onnection accepts=0A=090 bad connection attempts=0A=090 listen queue overfl=
ows=0A=09523 ignored RSTs in the windows=0A=092003969 connections establish=
ed (including accepts)=0A=092002786 connections closed (including 4056 drop=
s)=0A=09=091187984 connections updated cached RTT on close=0A=09=091191288 =
connections updated cached RTT variance on close=0A=09=09294899 connections=
updated cached ssthresh on close=0A=090 embryonic connections dropped=0A=
=0934785321 segments updated rtt (of 29019225 attempts)=0A=0942636 retransm=
it timeouts=0A=09=093512 connections dropped by rexmit timeout=0A=092554 pe=
rsist timeouts=0A=09=090 connections dropped by persist timeout=0A=090 Conn=
ections (fin_wait_2) dropped because of timeout=0A=0923 keepalive timeouts=
=0A=09=0923 keepalive probes sent=0A=09=090 connections dropped by keepaliv=
e=0A=0979387 correct ACK header predictions=0A=0916380715 correct data pack=
et header predictions=0A=091098039 syncache entries added=0A=09=090 retrans=
mitted=0A=09=090 dupsyn=0A=09=090 dropped=0A=09=091098039 completed=0A=09=
=090 bucket overflow=0A=09=090 cache overflow=0A=09=090 reset=0A=09=090 sta=
le=0A=09=090 aborted=0A=09=090 badack=0A=09=090 unreach=0A=09=090 zone fail=
ures=0A=091098039 cookies sent=0A=090 cookies received=0A=092 SACK recovery=
episodes=0A=090 segment rexmits in SACK recovery episodes=0A=090 byte rexm=
its in SACK recovery episodes=0A=090 SACK options (SACK blocks) received=0A=
=0955 SACK options (SACK blocks) sent=0A=090 SACK scoreboard overflow=0Audp=
:=0A=0979558178 datagrams received=0A=090 with incomplete header=0A=090 wit=
h bad data length field=0A=092 with bad checksum=0A=09929 with no checksum=
=0A=091622 dropped due to no socket=0A=0927825 broadcast/multicast datagram=
s undelivered=0A=090 dropped due to full socket buffers=0A=090 not for hash=
ed pcb=0A=0979528729 delivered=0A=0979523714 datagrams output=0A=090 times =
multicast source filter matched=0Asctp:=0A=090 input packets=0A=09=090 data=
grams=0A=09=090 packets that had data=0A=09=090 input SACK chunks=0A=09=090=
input DATA chunks=0A=09=090 duplicate DATA chunks=0A=09=090 input HB chunk=
s=0A=09=090 HB-ACK chunks=0A=09=090 input ECNE chunks=0A=09=090 input AUTH =
chunks=0A=09=090 chunks missing AUTH=0A=09=090 invalid HMAC ids received=0A=
=09=090 invalid secret ids received=0A=09=090 auth failed=0A=09=090 fast pa=
th receives all one chunk=0A=09=090 fast path multi-part data=0A=090 output=
packets=0A=09=090 output SACKs=0A=09=090 output DATA chunks=0A=09=090 retr=
ansmitted DATA chunks=0A=09=090 fast retransmitted DATA chunks=0A=09=090 FR=
's that happened more than once to same chunk.=0A=09=090 intput HB chunks=
=0A=09=090 output ECNE chunks=0A=09=090 output AUTH chunks=0A=09=090 ip_out=
put error counter=0A=09Packet drop statistics:=0A=09=090 from middle box=0A=
=09=090 from end host=0A=09=090 with data=0A=09=090 non-data, non-endhost=
=0A=09=090 non-endhost, bandwidth rep only=0A=09=090 not enough for chunk h=
eader=0A=09=090 not enough data to confirm=0A=09=090 where process_chunk_dr=
op said break=0A=09=090 failed to find TSN=0A=09=090 attempt reverse TSN lo=
okup=0A=09=090 e-host confirms zero-rwnd=0A=09=090 midbox confirms no space=
=0A=09=090 data did not match TSN=0A=09=090 TSN's marked for Fast Retran=0A=
=09Timeouts:=0A=09=090 iterator timers fired=0A=09=090 T3 data time outs=0A=
=09=090 window probe (T3) timers fired=0A=09=090 INIT timers fired=0A=09=09=
0 sack timers fired=0A=09=090 shutdown timers fired=0A=09=090 heartbeat tim=
ers fired=0A=09=090 a cookie timeout fired=0A=09=090 an endpoint changed it=
s cookiesecret=0A=09=090 PMTU timers fired=0A=09=090 shutdown ack timers fi=
red=0A=09=090 shutdown guard timers fired=0A=09=090 stream reset timers fir=
ed=0A=09=090 early FR timers fired=0A=09=090 an asconf timer fired=0A=09=09=
0 auto close timer fired=0A=09=090 asoc free timers expired=0A=09=090 inp f=
ree timers expired=0A=090 packet shorter than header=0A=090 checksum error=
=0A=090 no endpoint for port=0A=090 bad v-tag=0A=090 bad SID=0A=090 no memo=
ry=0A=090 number of multiple FR in a RTT window=0A=090 RFC813 allowed sendi=
ng=0A=090 RFC813 does not allow sending=0A=090 max burst dosn't allow sendi=
ng=0A=090 look ahead tells us no memory in interface=0A=090 numbers of wind=
ow probes sent=0A=090 times an output error to clamp down on next user send=
.=0A=090 times sctp_senderrors were caused from a user=0A=090 number of in =
data drops due to chunk limit reached=0A=090 number of in data drops due to=
rwnd limit reached=0A=090 times a ECN reduced the cwnd=0A=090 used express=
lookup via vtag=0A=090 collision in express lookup.=0A=090 times the sende=
r ran dry of user data on primary=0A=090 same for above=0A=090 sacks the sl=
ow way=0A=090 window update only sacks sent=0A=090 sends with sinfo_flags !=
=3D0=0A=090 unordered sends=0A=090 sends with EOF flag set=0A=090 sends wit=
h ABORT flag set=0A=090 times protocol drain called=0A=090 times we did a p=
rotocol drain=0A=090 times recv was called with peek=0A=090 cached chunks u=
sed=0A=090 cached stream oq's used=0A=090 unread messages abandonded by clo=
se=0A=090 send burst avoidance, already max burst inflight to net=0A=090 se=
nd cwnd full avoidance, already max burst inflight to net=0A=090 number of =
map array over-runs via fwd-tsn's=0Aip:=0A=09153027955 total packets receiv=
ed=0A=090 bad header checksums=0A=090 with size smaller than minimum=0A=090=
with data size < data length=0A=090 with ip length > max ip packet size=0A=
=090 with header length < data size=0A=090 with data length < header length=
=0A=090 with bad options=0A=090 with incorrect version number=0A=0917594719=
fragments received=0A=0919 fragments dropped (dup or out of space)=0A=0911=
fragments dropped after timeout=0A=092948502 packets reassembled ok=0A=091=
38381640 packets for this host=0A=0914 packets for unknown/unsupported prot=
ocol=0A=090 packets forwarded (0 packets fast forwarded)=0A=090 packets not=
forwardable=0A=0955 packets received for unknown multicast group=0A=090 re=
directs sent=0A=09126477794 packets sent from this host=0A=090 packets sent=
with fabricated ip header=0A=090 output packets dropped due to no bufs, et=
c.=0A=090 output packets discarded due to no route=0A=091732555 output data=
grams fragmented=0A=0910345284 fragments created=0A=090 datagrams that can'=
t be fragmented=0A=090 tunneling packets that can't find gif=0A=090 datagra=
ms with bad address in header=0Aicmp:=0A=091622 calls to icmp_error=0A=090 =
errors not generated in response to an icmp message=0A=09Output histogram:=
=0A=09=09echo reply: 2=0A=09=09destination unreachable: 1622=0A=090 message=
s with bad code fields=0A=090 messages < minimum length=0A=090 bad checksum=
s=0A=090 messages with bad length=0A=090 multicast echo requests ignored=0A=
=090 multicast timestamp requests ignored=0A=09Input histogram:=0A=09=09des=
tination unreachable: 14=0A=09=09echo: 2=0A=092 message responses generated=
=0A=090 invalid return addresses=0A=090 no return routes=0A=09ICMP address =
mask responses are disabled=0Aigmp:=0A=090 messages received=0A=090 message=
s received with too few bytes=0A=090 messages received with bad checksum=0A=
=090 membership queries received=0A=090 membership queries received with in=
valid field(s)=0A=090 membership reports received=0A=090 membership reports=
received with invalid field(s)=0A=090 membership reports received for grou=
ps to which we belong=0A=090 membership reports sent=0Aip6:=0A=09352688 tot=
al packets received=0A=090 with size smaller than minimum=0A=090 with data =
size < data length=0A=090 with bad options=0A=090 with incorrect version nu=
mber=0A=090 fragments received=0A=090 fragments dropped (dup or out of spac=
e)=0A=090 fragments dropped after timeout=0A=090 fragments that exceeded li=
mit=0A=090 packets reassembled ok=0A=09352688 packets for this host=0A=090 =
packets forwarded=0A=090 packets not forwardable=0A=090 redirects sent=0A=
=09352692 packets sent from this host=0A=090 packets sent with fabricated i=
p header=0A=090 output packets dropped due to no bufs, etc.=0A=091 output p=
acket discarded due to no route=0A=090 output datagrams fragmented=0A=090 f=
ragments created=0A=090 datagrams that can't be fragmented=0A=090 packets t=
hat violated scope rules=0A=090 multicast packets which we don't join=0A=09=
Input histogram:=0A=09=09TCP: 352688=0A=09Mbuf statistics:=0A=09=09352688 o=
ne mbuf=0A=09=090 one ext mbuf=0A=09=090 two or more ext mbuf=0A=090 packet=
s whose headers are not continuous=0A=090 tunneling packets that can't find=
gif=0A=090 packets discarded because of too many headers=0A=090 failures o=
f source address selection=0A=09352687 forward cache hit=0A=090 forward cac=
he miss=0A=09Source addresses selection rule applied:=0A=09=0950384 first c=
andidate=0A=09=0950384 same address=0Aicmp6:=0A=090 calls to icmp6_error=0A=
=090 errors not generated in response to an icmp6 message=0A=090 errors not=
generated because of rate limitation=0A=09Output histogram:=0A=09=09multic=
ast listener report: 4=0A=090 messages with bad code fields=0A=090 messages=
< minimum length=0A=090 bad checksums=0A=090 messages with bad length=0A=
=09Histogram of error messages to be generated:=0A=09=090 no route=0A=09=09=
0 administratively prohibited=0A=09=090 beyond scope=0A=09=090 address unre=
achable=0A=09=090 port unreachable=0A=09=090 packet too big=0A=09=090 time =
exceed transit=0A=09=090 time exceed reassembly=0A=09=090 erroneous header =
field=0A=09=090 unrecognized next header=0A=09=090 unrecognized option=0A=
=09=090 redirect=0A=09=090 unknown=0A=090 message responses generated=0A=09=
0 messages with too many ND options=0A=090 messages with bad ND options=0A=
=090 bad neighbor solicitation messages=0A=090 bad neighbor advertisement m=
essages=0A=090 bad router solicitation messages=0A=090 bad router advertise=
ment messages=0A=090 bad redirect messages=0A=090 path MTU changes=0Arip6:=
=0A=090 messages received=0A=090 checksum calcurations on inbound=0A=090 me=
ssages with bad checksum=0A=090 messages dropped due to no socket=0A=090 mu=
lticast messages dropped due to no socket=0A=090 messages dropped due to fu=
ll socket buffers=0A=090 delivered=0A=090 datagrams output=0A=0A=0A=0A=0A=
=0ANow for the NFS (FreeBSD 8.0) server side:=0A=0A /0 =
/1 /2 /3 /4 /5 /6 /7 /8 /9 /10=0A Load Average |=
=0A=0A IP Input IP Output=0A 5388 to=
tal packets received 4717 total packets sent=0A 0 - with bad =
checksums 4717 - generated locally=0A 0 - too short for hea=
der 0 - output drops=0A 0 - too short for data =
65 output fragments generated=0A 0 - with invalid hlen =
0 - fragmentation failed=0A 0 - with invalid length 0 des=
tinations unreachable=0A 0 - with invalid version 0 packet=
s output via raw IP=0A 0 - jumbograms=0A 808 total fragments re=
ceived UDP Statistics=0A 0 - fragments dropped 4=
714 total input packets=0A 0 - fragments timed out 0 - to=
o short for header=0A 137 - packets reassembled ok 0 - invalid=
checksum=0A 0 packets forwarded 0 - no checksum=0A =
0 - unreachable dests 0 - invalid length=0A 0 - r=
edirects generated 0 - no socket for dest port=0A 0 optio=
n errors 0 - no socket for broadcast=0A 0 unwante=
d multicasts 0 - socket buffer full=0A 4717 delivered to u=
pper layer 4714 total output packets=0A=0A=0AAgain - packet volume sho=
uld be in the hundreds right now with bursts during traffic - but this is a=
constant. There is no growth in disk usage over time - nothing is actuall=
y getting written out anywhere. If I kill everything on the FreeBSD 7.0 cl=
ient the packets still transfer until the client is rebooted. Then everyth=
ing is usually OK again and then often serveral hrs later the FreeBSD 8.0 s=
erver loses networking or simply reboots.=0A=0AAnd to complete the stats, h=
ere's netstat -s for the FreeBSD 8.0 NFS server:=0A=0Atcp:=0A=0911241344 pa=
ckets sent=0A=09=098436896 data packets (24959317163 bytes)=0A=09=09100 dat=
a packets (112180 bytes) retransmitted=0A=09=091 data packet unnecessarily =
retransmitted=0A=09=090 resends initiated by MTU discovery=0A=09=092282609 =
ack-only packets (6239 delayed)=0A=09=090 URG only packets=0A=09=090 window=
probe packets=0A=09=09518530 window update packets=0A=09=093305 control pa=
ckets=0A=0917239617 packets received=0A=09=0910845777 acks (for 24959571358=
bytes)=0A=09=09560 duplicate acks=0A=09=090 acks for unsent data=0A=09=091=
0437746 packets (4690003575 bytes) received in-sequence=0A=09=0917 complete=
ly duplicate packets (11070 bytes)=0A=09=090 old duplicate packets=0A=09=09=
0 packets with some dup. data (0 bytes duped)=0A=09=0939 out-of-order packe=
ts (43478 bytes)=0A=09=090 packets (0 bytes) of data after window=0A=09=090=
window probes=0A=09=091130377 window update packets=0A=09=09132 packets re=
ceived after close=0A=09=090 discarded for bad checksums=0A=09=090 discarde=
d for bad header offset fields=0A=09=090 discarded because packet too short=
=0A=09=090 discarded due to memory problems=0A=093 connection requests=0A=
=093310 connection accepts=0A=091 bad connection attempt=0A=090 listen queu=
e overflows=0A=090 ignored RSTs in the windows=0A=093313 connections establ=
ished (including accepts)=0A=093302 connections closed (including 1 drop)=
=0A=09=092233 connections updated cached RTT on close=0A=09=092233 connecti=
ons updated cached RTT variance on close=0A=09=0921 connections updated cac=
hed ssthresh on close=0A=090 embryonic connections dropped=0A=098077952 seg=
ments updated rtt (of 6908327 attempts)=0A=0910 retransmit timeouts=0A=09=
=090 connections dropped by rexmit timeout=0A=090 persist timeouts=0A=09=09=
0 connections dropped by persist timeout=0A=090 Connections (fin_wait_2) dr=
opped because of timeout=0A=0910 keepalive timeouts=0A=09=099 keepalive pro=
bes sent=0A=09=091 connection dropped by keepalive=0A=091341332 correct ACK=
header predictions=0A=095196626 correct data packet header predictions=0A=
=093316 syncache entries added=0A=09=0918 retransmitted=0A=09=092 dupsyn=0A=
=09=090 dropped=0A=09=093310 completed=0A=09=090 bucket overflow=0A=09=090 =
cache overflow=0A=09=090 reset=0A=09=096 stale=0A=09=090 aborted=0A=09=090 =
badack=0A=09=090 unreach=0A=09=090 zone failures=0A=093316 cookies sent=0A=
=090 cookies received=0A=0918 SACK recovery episodes=0A=0989 segment rexmit=
s in SACK recovery episodes=0A=09101595 byte rexmits in SACK recovery episo=
des=0A=09640 SACK options (SACK blocks) received=0A=0977 SACK options (SACK=
blocks) sent=0A=090 SACK scoreboard overflow=0A=090 packets with ECN CE bi=
t set=0A=090 packets with ECN ECT(0) bit set=0A=090 packets with ECN ECT(1)=
bit set=0A=090 successful ECN handshakes=0A=090 times ECN reduced the cong=
estion window=0Audp:=0A=0991334533 datagrams received=0A=090 with incomplet=
e header=0A=090 with bad data length field=0A=098 with bad checksum=0A=0916=
with no checksum=0A=09254 dropped due to no socket=0A=094339 broadcast/mul=
ticast datagrams undelivered=0A=0956 dropped due to full socket buffers=0A=
=090 not for hashed pcb=0A=0991329876 delivered=0A=0991316517 datagrams out=
put=0A=090 times multicast source filter matched=0Asctp:=0A=090 input packe=
ts=0A=09=090 datagrams=0A=09=090 packets that had data=0A=09=090 input SACK=
chunks=0A=09=090 input DATA chunks=0A=09=090 duplicate DATA chunks=0A=09=
=090 input HB chunks=0A=09=090 HB-ACK chunks=0A=09=090 input ECNE chunks=0A=
=09=090 input AUTH chunks=0A=09=090 chunks missing AUTH=0A=09=090 invalid H=
MAC ids received=0A=09=090 invalid secret ids received=0A=09=090 auth faile=
d=0A=09=090 fast path receives all one chunk=0A=09=090 fast path multi-part=
data=0A=090 output packets=0A=09=090 output SACKs=0A=09=090 output DATA ch=
unks=0A=09=090 retransmitted DATA chunks=0A=09=090 fast retransmitted DATA =
chunks=0A=09=090 FR's that happened more than once to same chunk=0A=09=090 =
intput HB chunks=0A=09=090 output ECNE chunks=0A=09=090 output AUTH chunks=
=0A=09=090 ip_output error counter=0A=09Packet drop statistics:=0A=09=090 f=
rom middle box=0A=09=090 from end host=0A=09=090 with data=0A=09=090 non-da=
ta, non-endhost=0A=09=090 non-endhost, bandwidth rep only=0A=09=090 not eno=
ugh for chunk header=0A=09=090 not enough data to confirm=0A=09=090 where p=
rocess_chunk_drop said break=0A=09=090 failed to find TSN=0A=09=090 attempt=
reverse TSN lookup=0A=09=090 e-host confirms zero-rwnd=0A=09=090 midbox co=
nfirms no space=0A=09=090 data did not match TSN=0A=09=090 TSN's marked for=
Fast Retran=0A=09Timeouts:=0A=09=093 iterator timers fired=0A=09=090 T3 da=
ta time outs=0A=09=090 window probe (T3) timers fired=0A=09=090 INIT timers=
fired=0A=09=090 sack timers fired=0A=09=090 shutdown timers fired=0A=09=09=
0 heartbeat timers fired=0A=09=090 a cookie timeout fired=0A=09=090 an endp=
oint changed its cookiesecret=0A=09=090 PMTU timers fired=0A=09=090 shutdow=
n ack timers fired=0A=09=090 shutdown guard timers fired=0A=09=090 stream r=
eset timers fired=0A=09=090 early FR timers fired=0A=09=090 an asconf timer=
fired=0A=09=090 auto close timer fired=0A=09=090 asoc free timers expired=
=0A=09=090 inp free timers expired=0A=090 packet shorter than header=0A=090=
checksum error=0A=090 no endpoint for port=0A=090 bad v-tag=0A=090 bad SID=
=0A=090 no memory=0A=090 number of multiple FR in a RTT window=0A=090 RFC81=
3 allowed sending=0A=090 RFC813 does not allow sending=0A=090 times max bur=
st prohibited sending=0A=090 look ahead tells us no memory in interface=0A=
=090 numbers of window probes sent=0A=090 times an output error to clamp do=
wn on next user send=0A=090 times sctp_senderrors were caused from a user=
=0A=090 number of in data drops due to chunk limit reached=0A=090 number of=
in data drops due to rwnd limit reached=0A=090 times a ECN reduced the cwn=
d=0A=090 used express lookup via vtag=0A=090 collision in express lookup=0A=
=090 times the sender ran dry of user data on primary=0A=090 same for above=
=0A=090 sacks the slow way=0A=090 window update only sacks sent=0A=090 send=
s with sinfo_flags !=3D0=0A=090 unordered sends=0A=090 sends with EOF flag =
set=0A=090 sends with ABORT flag set=0A=090 times protocol drain called=0A=
=090 times we did a protocol drain=0A=090 times recv was called with peek=
=0A=090 cached chunks used=0A=090 cached stream oq's used=0A=090 unread mes=
sages abandonded by close=0A=090 send burst avoidance, already max burst in=
flight to net=0A=090 send cwnd full avoidance, already max burst inflight t=
o net=0A=090 number of map array over-runs via fwd-tsn's=0Aip:=0A=091223213=
95 total packets received=0A=090 bad header checksums=0A=090 with size smal=
ler than minimum=0A=090 with data size < data length=0A=090 with ip length =
> max ip packet size=0A=090 with header length < data size=0A=090 with data=
length < header length=0A=090 with bad options=0A=090 with incorrect versi=
on number=0A=0916507934 fragments received=0A=0919 fragments dropped (dup o=
r out of space)=0A=09970 fragments dropped after timeout=0A=092761830 packe=
ts reassembled ok=0A=09108575291 packets for this host=0A=090 packets for u=
nknown/unsupported protocol=0A=090 packets forwarded (0 packets fast forwar=
ded)=0A=090 packets not forwardable=0A=090 packets received for unknown mul=
ticast group=0A=090 redirects sent=0A=09102560932 packets sent from this ho=
st=0A=090 packets sent with fabricated ip header=0A=090 output packets drop=
ped due to no bufs, etc.=0A=090 output packets discarded due to no route=0A=
=093269107 output datagrams fragmented=0A=0919499266 fragments created=0A=
=090 datagrams that can't be fragmented=0A=090 tunneling packets that can't=
find gif=0A=090 datagrams with bad address in header=0Aicmp:=0A=09254 call=
s to icmp_error=0A=090 errors not generated in response to an icmp message=
=0A=09Output histogram:=0A=09=09echo reply: 1132=0A=09=09destination unreac=
hable: 254=0A=090 messages with bad code fields=0A=090 messages less than t=
he minimum length=0A=090 messages with bad checksum=0A=090 messages with ba=
d length=0A=090 multicast echo requests ignored=0A=090 multicast timestamp =
requests ignored=0A=09Input histogram:=0A=09=09echo reply: 6=0A=09=09echo: =
1132=0A=091132 message responses generated=0A=090 invalid return addresses=
=0A=090 no return routes=0A=09ICMP address mask responses are disabled=0Aig=
mp:=0A=090 messages received=0A=090 messages received with too few bytes=0A=
=090 messages received with wrong TTL=0A=090 messages received with bad che=
cksum=0A=090 V1/V2 membership queries received=0A=090 V3 membership queries=
received=0A=090 membership queries received with invalid field(s)=0A=090 g=
eneral queries received=0A=090 group queries received=0A=090 group-source q=
ueries received=0A=090 group-source queries dropped=0A=090 membership repor=
ts received=0A=090 membership reports received with invalid field(s)=0A=090=
membership reports received for groups to which we belong=0A=090 V3 report=
s received without Router Alert=0A=090 membership reports sent=0Aip6:=0A=09=
166 total packets received=0A=090 with size smaller than minimum=0A=090 wit=
h data size < data length=0A=090 with bad options=0A=090 with incorrect ver=
sion number=0A=090 fragments received=0A=090 fragments dropped (dup or out =
of space)=0A=090 fragments dropped after timeout=0A=090 fragments that exce=
eded limit=0A=090 packets reassembled ok=0A=09166 packets for this host=0A=
=090 packets forwarded=0A=090 packets not forwardable=0A=090 redirects sent=
=0A=090 packets sent from this host=0A=090 packets sent with fabricated ip =
header=0A=090 output packets dropped due to no bufs, etc.=0A=090 output pac=
kets discarded due to no route=0A=090 output datagrams fragmented=0A=090 fr=
agments created=0A=090 datagrams that can't be fragmented=0A=090 packets th=
at violated scope rules=0A=09166 multicast packets which we don't join=0A=
=09Input histogram:=0A=09=09ICMP6: 166=0A=09Mbuf statistics:=0A=09=090 one =
mbuf=0A=09=09166 one ext mbuf=0A=09=090 two or more ext mbuf=0A=090 packets=
whose headers are not continuous=0A=090 tunneling packets that can't find =
gif=0A=090 packets discarded because of too many headers=0A=090 failures of=
source address selection=0A=09Source addresses selection rule applied:=0Ai=
cmp6:=0A=090 calls to icmp6_error=0A=090 errors not generated in response t=
o an icmp6 message=0A=090 errors not generated because of rate limitation=
=0A=090 messages with bad code fields=0A=090 messages < minimum length=0A=
=090 bad checksums=0A=090 messages with bad length=0A=09Histogram of error =
messages to be generated:=0A=09=090 no route=0A=09=090 administratively pro=
hibited=0A=09=090 beyond scope=0A=09=090 address unreachable=0A=09=090 port=
unreachable=0A=09=090 packet too big=0A=09=090 time exceed transit=0A=09=
=090 time exceed reassembly=0A=09=090 erroneous header field=0A=09=090 unre=
cognized next header=0A=09=090 unrecognized option=0A=09=090 redirect=0A=09=
=090 unknown=0A=090 message responses generated=0A=090 messages with too ma=
ny ND options=0A=090 messages with bad ND options=0A=090 bad neighbor solic=
itation messages=0A=090 bad neighbor advertisement messages=0A=090 bad rout=
er solicitation messages=0A=090 bad router advertisement messages=0A=090 ba=
d redirect messages=0A=090 path MTU changes=0Arip6:=0A=090 messages receive=
d=0A=090 checksum calculations on inbound=0A=090 messages with bad checksum=
=0A=090 messages dropped due to no socket=0A=090 multicast messages dropped=
due to no socket=0A=090 messages dropped due to full socket buffers=0A=090=
delivered=0A=090 datagrams output=0A=0A=0A=0A=0A=0A=0A
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