Date: Wed, 29 Jan 2003 20:39:58 +1100 From: Peter Jeremy <peterjeremy@optushome.com.au> To: freebsd-stable@freebsd.org Subject: TCP oddities in -STABLE Message-ID: <20030129093958.GG88010@cirb503493.alcatel.com.au>
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I've been seeing occasional unexpected pauses in output across my home
LAN eg 'sh -x some_script' will pause for a second at apparently
random intervals. Looking at tcpdump output shows a couple of oddities
that I'm hoping someone can explain.
Background: The client is an old Pentium laptop running 4.6 from
mid-July, using a 3Com Etherlink III 3C589 NIC (10baseT). The server
is an Athlon XP running -stable from last Sunday, using a RealTek 8139
NIC (100baseTX FD). They are connected using a cheap-and-very-nasty
switch. 'netstat -m' on the client shows no problems and there are no
kernel messages suggesting a resource problem.
The following tcpdump primarily shows packets (and timing) on the
client (laptop), I've pruned the options information and cut the
timestamp down to seconds to try and minimise the size of this e-mail.
I've also merged in transmitted packets that never arrived (refer to
previous comments on the switch I'm using) - these have a blank
timestamp. Full dumps available on request.
My questions are:
1) Why doesn't the laptop write any ack packets back to the server
between 11.238341 and 11.243160, or between 11.244625 and
11.261048? The ack packets do get transmitted but much later than I
would expect. Is this a funny in the ep(4) driver?
2) Is it reasonable for the server to continue sending so many packets
in the absence of any acks? (On reflection, I presume this is ssh
disabling Nagle - the packets have tos 0x10).
3) The dump includes a packet 12880:12960(80) at 11.242797 but the
ack's include a large number of repeat acks for this packet
(11.278380 through 11.280344), implying this packet never arrived.
Since it did get to bpf, why didn't the TCP stack see it? (The
same thing seems to have happened to 15856:15904(48) at 11.249113).
4) Shouldn't the RTT calculations have triggered faster re-transmits
between 11.286337 and 13.684779? Either with the client realizing
it needs to quickly double-ack 17488 to force a re-transmit, or the
server working out that if it got the ack 17488 within 1msec of
re-sending 15856:17304(1448) [this time comes from the server
trace, it can't be seen below] then it can trust that this ack
represents missing data.
5) The pattern of non-received packets suggests that something is
over-running a network queue. Is it possible that the rl driver is
over-running the hardware? The switch claims 'total 128KB RAM per
device' for an 8-port switch. Even if I assume this means 'fixed
8KB ingress and egress FIFO per port', there doesn't seem to be
enough queued data (and the 802.3x flow control should have cut in).
Can anyone suggest how to track this down and eradicate it?
09.520536 laptop.4357 > server.ssh: S 400775150:400775150(0) win 57344
09.520834 server.ssh > laptop.4357: S 1252883695:1252883695(0) ack 400775151 win 57344
09.521062 laptop.4357 > server.ssh: . ack 1 win 57920
[deleted]
11.238341 server.ssh > laptop.4357: P 10080:10160(80) ack 2456 win 57920
11.238423 server.ssh > laptop.4357: P 10160:10208(48) ack 2456 win 57920
11.238502 server.ssh > laptop.4357: P 10208:10256(48) ack 2456 win 57920
11.238580 server.ssh > laptop.4357: P 10256:10304(48) ack 2456 win 57920
11.238680 server.ssh > laptop.4357: P 10304:10384(80) ack 2456 win 57920
11.238759 server.ssh > laptop.4357: P 10384:10432(48) ack 2456 win 57920
11.238838 server.ssh > laptop.4357: P 10432:10480(48) ack 2456 win 57920
11.238921 server.ssh > laptop.4357: P 10480:10528(48) ack 2456 win 57920
11.239024 server.ssh > laptop.4357: P 10528:10608(80) ack 2456 win 57920
11.239107 server.ssh > laptop.4357: P 10608:10656(48) ack 2456 win 57920
11.239187 server.ssh > laptop.4357: P 10656:10704(48) ack 2456 win 57920
11.239267 server.ssh > laptop.4357: P 10704:10752(48) ack 2456 win 57920
11.239350 server.ssh > laptop.4357: P 10752:10800(48) ack 2456 win 57920
11.239430 server.ssh > laptop.4357: P 10800:10848(48) ack 2456 win 57920
11.239510 server.ssh > laptop.4357: P 10848:10896(48) ack 2456 win 57920
11.239613 server.ssh > laptop.4357: P 10896:10976(80) ack 2456 win 57920
11.239696 server.ssh > laptop.4357: P 10976:11024(48) ack 2456 win 57920
11.239784 server.ssh > laptop.4357: P 11024:11072(48) ack 2456 win 57920
11.239869 server.ssh > laptop.4357: P 11072:11120(48) ack 2456 win 57920
11.239982 server.ssh > laptop.4357: P 11120:11216(96) ack 2456 win 57920
11.240068 server.ssh > laptop.4357: P 11216:11264(48) ack 2456 win 57920
11.240152 server.ssh > laptop.4357: P 11264:11312(48) ack 2456 win 57920
11.240238 server.ssh > laptop.4357: P 11312:11360(48) ack 2456 win 57920
11.240350 server.ssh > laptop.4357: P 11360:11456(96) ack 2456 win 57920
11.240435 server.ssh > laptop.4357: P 11456:11504(48) ack 2456 win 57920
11.240520 server.ssh > laptop.4357: P 11504:11552(48) ack 2456 win 57920
11.240605 server.ssh > laptop.4357: P 11552:11600(48) ack 2456 win 57920
11.240718 server.ssh > laptop.4357: P 11600:11696(96) ack 2456 win 57920
11.240804 server.ssh > laptop.4357: P 11696:11744(48) ack 2456 win 57920
11.240890 server.ssh > laptop.4357: P 11744:11792(48) ack 2456 win 57920
11.240976 server.ssh > laptop.4357: P 11792:11840(48) ack 2456 win 57920
11.241101 server.ssh > laptop.4357: P 11840:11920(80) ack 2456 win 57920
11.241186 server.ssh > laptop.4357: P 11920:11968(48) ack 2456 win 57920
11.241272 server.ssh > laptop.4357: P 11968:12016(48) ack 2456 win 57920
11.241358 server.ssh > laptop.4357: P 12016:12064(48) ack 2456 win 57920
11.241442 server.ssh > laptop.4357: P 12064:12112(48) ack 2456 win 57920
11.241528 server.ssh > laptop.4357: P 12112:12160(48) ack 2456 win 57920
11.241614 server.ssh > laptop.4357: P 12160:12208(48) ack 2456 win 57920
11.241719 server.ssh > laptop.4357: P 12208:12288(80) ack 2456 win 57920
11.241803 server.ssh > laptop.4357: P 12288:12336(48) ack 2456 win 57920
11.241889 server.ssh > laptop.4357: P 12336:12384(48) ack 2456 win 57920
11.241974 server.ssh > laptop.4357: P 12384:12432(48) ack 2456 win 57920
11.242078 server.ssh > laptop.4357: P 12432:12512(80) ack 2456 win 57920
11.242164 server.ssh > laptop.4357: P 12512:12560(48) ack 2456 win 57920
11.242248 server.ssh > laptop.4357: P 12560:12608(48) ack 2456 win 57920
11.242334 server.ssh > laptop.4357: P 12608:12656(48) ack 2456 win 57920
11.242439 server.ssh > laptop.4357: P 12656:12736(80) ack 2456 win 57920
11.242524 server.ssh > laptop.4357: P 12736:12784(48) ack 2456 win 57920
11.242608 server.ssh > laptop.4357: P 12784:12832(48) ack 2456 win 57920
11.242693 server.ssh > laptop.4357: P 12832:12880(48) ack 2456 win 57920
11.242797 server.ssh > laptop.4357: P 12880:12960(80) ack 2456 win 57920
11.242879 server.ssh > laptop.4357: P 12960:13008(48) ack 2456 win 57920
11.242958 server.ssh > laptop.4357: P 13008:13056(48) ack 2456 win 57920
11.243037 server.ssh > laptop.4357: P 13056:13104(48) ack 2456 win 57920
11.243160 laptop.4357 > server.ssh: . ack 10160 win 52960
11.243263 laptop.4357 > server.ssh: . ack 10256 win 52864
11.243362 laptop.4357 > server.ssh: . ack 10384 win 52736
11.243464 laptop.4357 > server.ssh: . ack 10480 win 52640
11.244625 server.ssh > laptop.4357: P 13104:13184(80) ack 2456 win 57920
11.244710 server.ssh > laptop.4357: P 13184:13232(48) ack 2456 win 57920
11.244791 server.ssh > laptop.4357: P 13232:13280(48) ack 2456 win 57920
11.244876 server.ssh > laptop.4357: P 13280:13328(48) ack 2456 win 57920
11.244957 server.ssh > laptop.4357: P 13328:13376(48) ack 2456 win 57920
11.245037 server.ssh > laptop.4357: P 13376:13424(48) ack 2456 win 57920
11.245120 server.ssh > laptop.4357: P 13424:13472(48) ack 2456 win 57920
11.245223 server.ssh > laptop.4357: P 13472:13552(80) ack 2456 win 57920
11.245308 server.ssh > laptop.4357: P 13552:13600(48) ack 2456 win 57920
11.245393 server.ssh > laptop.4357: P 13600:13648(48) ack 2456 win 57920
11.245478 server.ssh > laptop.4357: P 13648:13696(48) ack 2456 win 57920
11.245582 server.ssh > laptop.4357: P 13696:13776(80) ack 2456 win 57920
11.245667 server.ssh > laptop.4357: P 13776:13824(48) ack 2456 win 57920
11.245752 server.ssh > laptop.4357: P 13824:13872(48) ack 2456 win 57920
11.245839 server.ssh > laptop.4357: P 13872:13920(48) ack 2456 win 57920
11.245943 server.ssh > laptop.4357: P 13920:14000(80) ack 2456 win 57920
11.246028 server.ssh > laptop.4357: P 14000:14048(48) ack 2456 win 57920
11.246114 server.ssh > laptop.4357: P 14048:14096(48) ack 2456 win 57920
11.246198 server.ssh > laptop.4357: P 14096:14144(48) ack 2456 win 57920
11.246304 server.ssh > laptop.4357: P 14144:14224(80) ack 2456 win 57920
11.246389 server.ssh > laptop.4357: P 14224:14272(48) ack 2456 win 57920
11.246475 server.ssh > laptop.4357: P 14272:14320(48) ack 2456 win 57920
11.246561 server.ssh > laptop.4357: P 14320:14368(48) ack 2456 win 57920
11.246665 server.ssh > laptop.4357: P 14368:14448(80) ack 2456 win 57920
11.246751 server.ssh > laptop.4357: P 14448:14496(48) ack 2456 win 57920
11.246836 server.ssh > laptop.4357: P 14496:14544(48) ack 2456 win 57920
11.246922 server.ssh > laptop.4357: P 14544:14592(48) ack 2456 win 57920
11.247031 server.ssh > laptop.4357: P 14592:14640(48) ack 2456 win 57920
11.247119 server.ssh > laptop.4357: P 14640:14688(48) ack 2456 win 57920
11.247205 server.ssh > laptop.4357: P 14688:14736(48) ack 2456 win 57920
11.247310 server.ssh > laptop.4357: P 14736:14816(80) ack 2456 win 57920
11.247395 server.ssh > laptop.4357: P 14816:14864(48) ack 2456 win 57920
11.247481 server.ssh > laptop.4357: P 14864:14912(48) ack 2456 win 57920
11.247567 server.ssh > laptop.4357: P 14912:14960(48) ack 2456 win 57920
11.247671 server.ssh > laptop.4357: P 14960:15040(80) ack 2456 win 57920
11.247756 server.ssh > laptop.4357: P 15040:15088(48) ack 2456 win 57920
11.247842 server.ssh > laptop.4357: P 15088:15136(48) ack 2456 win 57920
11.247926 server.ssh > laptop.4357: P 15136:15184(48) ack 2456 win 57920
11.248030 server.ssh > laptop.4357: P 15184:15264(80) ack 2456 win 57920
11.248116 server.ssh > laptop.4357: P 15264:15312(48) ack 2456 win 57920
11.248201 server.ssh > laptop.4357: P 15312:15360(48) ack 2456 win 57920
11.248287 server.ssh > laptop.4357: P 15360:15408(48) ack 2456 win 57920
11.248391 server.ssh > laptop.4357: P 15408:15488(80) ack 2456 win 57920
11.248476 server.ssh > laptop.4357: P 15488:15536(48) ack 2456 win 57920
11.248562 server.ssh > laptop.4357: P 15536:15584(48) ack 2456 win 57920
11.248646 server.ssh > laptop.4357: P 15584:15632(48) ack 2456 win 57920
11.248750 server.ssh > laptop.4357: P 15632:15712(80) ack 2456 win 57920
11.248836 server.ssh > laptop.4357: P 15712:15760(48) ack 2456 win 57920
11.248942 server.ssh > laptop.4357: P 15760:15808(48) ack 2456 win 57920
11.249028 server.ssh > laptop.4357: P 15808:15856(48) ack 2456 win 57920
11.249113 server.ssh > laptop.4357: P 15856:15904(48) ack 2456 win 57920
11.249194 server.ssh > laptop.4357: P 15904:15952(48) ack 2456 win 57920
11.249274 server.ssh > laptop.4357: P 15952:16000(48) ack 2456 win 57920
11.249371 server.ssh > laptop.4357: P 16000:16080(80) ack 2456 win 57920
11.249450 server.ssh > laptop.4357: P 16080:16128(48) ack 2456 win 57920
11.249530 server.ssh > laptop.4357: P 16128:16176(48) ack 2456 win 57920
11.251209 server.ssh > laptop.4357: P 16176:16224(48) ack 2456 win 57920
11.251316 server.ssh > laptop.4357: P 16224:16304(80) ack 2456 win 57920
11.251402 server.ssh > laptop.4357: P 16304:16352(48) ack 2456 win 57920
11.251487 server.ssh > laptop.4357: P 16352:16400(48) ack 2456 win 57920
11.251574 server.ssh > laptop.4357: P 16400:16448(48) ack 2456 win 57920
11.251678 server.ssh > laptop.4357: P 16448:16528(80) ack 2456 win 57920
11.251765 server.ssh > laptop.4357: P 16528:16576(48) ack 2456 win 57920
11.251850 server.ssh > laptop.4357: P 16576:16624(48) ack 2456 win 57920
11.251935 server.ssh > laptop.4357: P 16624:16672(48) ack 2456 win 57920
11.252038 server.ssh > laptop.4357: P 16672:16752(80) ack 2456 win 57920
11.252123 server.ssh > laptop.4357: P 16752:16800(48) ack 2456 win 57920
11.252209 server.ssh > laptop.4357: P 16800:16848(48) ack 2456 win 57920
11.252294 server.ssh > laptop.4357: P 16848:16896(48) ack 2456 win 57920
11.252399 server.ssh > laptop.4357: P 16896:16976(80) ack 2456 win 57920
11.252484 server.ssh > laptop.4357: P 16976:17024(48) ack 2456 win 57920
11.252569 server.ssh > laptop.4357: P 17024:17072(48) ack 2456 win 57920
11.252656 server.ssh > laptop.4357: P 17072:17120(48) ack 2456 win 57920
11.252741 server.ssh > laptop.4357: P 17120:17168(48) ack 2456 win 57920
11.252827 server.ssh > laptop.4357: P 17168:17216(48) ack 2456 win 57920
11.252911 server.ssh > laptop.4357: P 17216:17264(48) ack 2456 win 57920
11.253015 server.ssh > laptop.4357: P 17264:17344(80) ack 2456 win 57920
11.253102 server.ssh > laptop.4357: P 17344:17392(48) ack 2456 win 57920
11.253186 server.ssh > laptop.4357: P 17392:17440(48) ack 2456 win 57920
11.253272 server.ssh > laptop.4357: P 17440:17488(48) ack 2456 win 57920
server.ssh > laptop.4357: P 17488:17568(80) ack 2456 win 57920
11.253357 server.ssh > laptop.4357: P 17568:17616(48) ack 2456 win 57920
11.253443 server.ssh > laptop.4357: P 17616:17664(48) ack 2456 win 57920
11.253530 server.ssh > laptop.4357: P 17664:17712(48) ack 2456 win 57920
server.ssh > laptop.4357: P 17712:17792(80) ack 2456 win 57920
11.253615 server.ssh > laptop.4357: P 17792:17840(48) ack 2456 win 57920
11.253700 server.ssh > laptop.4357: P 17840:17888(48) ack 2456 win 57920
server.ssh > laptop.4357: P 17888:17936(48) ack 2456 win 57920
11.253803 server.ssh > laptop.4357: P 17936:18016(80) ack 2456 win 57920
server.ssh > laptop.4357: P 18016:18064(48) ack 2456 win 57920
11.253888 server.ssh > laptop.4357: P 18064:18112(48) ack 2456 win 57920
11.253974 server.ssh > laptop.4357: P 18112:18160(48) ack 2456 win 57920
server.ssh > laptop.4357: P 18160:18240(80) ack 2456 win 57920
11.254060 server.ssh > laptop.4357: P 18240:18288(48) ack 2456 win 57920
server.ssh > laptop.4357: P 18288:18336(48) ack 2456 win 57920
11.254146 server.ssh > laptop.4357: P 18336:18384(48) ack 2456 win 57920
11.254231 server.ssh > laptop.4357: P 18384:18432(48) ack 2456 win 57920
11.254317 server.ssh > laptop.4357: P 18432:18480(48) ack 2456 win 57920
11.254401 server.ssh > laptop.4357: P 18480:18528(48) ack 2456 win 57920
server.ssh > laptop.4357: P 18528:18608(80) ack 2456 win 57920
11.254488 server.ssh > laptop.4357: P 18608:18656(48) ack 2456 win 57920
11.254572 server.ssh > laptop.4357: P 18656:18704(48) ack 2456 win 57920
11.254658 server.ssh > laptop.4357: P 18704:18752(48) ack 2456 win 57920
server.ssh > laptop.4357: P 18752:18832(80) ack 2456 win 57920
11.254744 server.ssh > laptop.4357: P 18832:18880(48) ack 2456 win 57920
11.254829 server.ssh > laptop.4357: P 18880:18928(48) ack 2456 win 57920
11.254913 server.ssh > laptop.4357: P 18928:18976(48) ack 2456 win 57920
server.ssh > laptop.4357: P 18976:19056(80) ack 2456 win 57920
11.254998 server.ssh > laptop.4357: P 19056:19104(48) ack 2456 win 57920
11.255084 server.ssh > laptop.4357: P 19104:19152(48) ack 2456 win 57920
11.255177 server.ssh > laptop.4357: P 19152:19200(48) ack 2456 win 57920
server.ssh > laptop.4357: P 19200:19280(80) ack 2456 win 57920
11.255262 server.ssh > laptop.4357: P 19280:19328(48) ack 2456 win 57920
11.255348 server.ssh > laptop.4357: P 19328:19376(48) ack 2456 win 57920
server.ssh > laptop.4357: P 19376:19424(48) ack 2456 win 57920
server.ssh > laptop.4357: P 19424:19504(80) ack 2456 win 57920
11.255434 server.ssh > laptop.4357: P 19504:19552(48) ack 2456 win 57920
11.255519 server.ssh > laptop.4357: P 19552:19600(48) ack 2456 win 57920
11.255606 server.ssh > laptop.4357: P 19600:19648(48) ack 2456 win 57920
11.255687 server.ssh > laptop.4357: P 19648:19696(48) ack 2456 win 57920
11.255767 server.ssh > laptop.4357: P 19696:19744(48) ack 2456 win 57920
11.255846 server.ssh > laptop.4357: P 19744:19792(48) ack 2456 win 57920
server.ssh > laptop.4357: P 19792:19872(80) ack 2456 win 57920
11.255925 server.ssh > laptop.4357: P 19872:19920(48) ack 2456 win 57920
11.256005 server.ssh > laptop.4357: P 19920:19968(48) ack 2456 win 57920
server.ssh > laptop.4357: P 19968:20016(48) ack 2456 win 57920
11.256103 server.ssh > laptop.4357: P 20016:20096(80) ack 2456 win 57920
server.ssh > laptop.4357: P 20096:20144(48) ack 2456 win 57920
11.256181 server.ssh > laptop.4357: P 20144:20192(48) ack 2456 win 57920
server.ssh > laptop.4357: P 20192:20240(48) ack 2456 win 57920
server.ssh > laptop.4357: P 20240:20320(80) ack 2456 win 57920
11.256261 server.ssh > laptop.4357: P 20320:20368(48) ack 2456 win 57920
11.260188 server.ssh > laptop.4357: P 20368:21712(1344) ack 2456 win 57920
11.260953 server.ssh > laptop.4357: P 21712:22912(1200) ack 2456 win 57920
11.261048 server.ssh > laptop.4357: P 22912:22976(64) ack 2456 win 57920
11.276885 laptop.4357 > server.ssh: . ack 10608 win 52512
11.276969 laptop.4357 > server.ssh: . ack 10704 win 52416
11.277019 laptop.4357 > server.ssh: . ack 10800 win 52320
11.277070 laptop.4357 > server.ssh: . ack 10896 win 52224
11.277134 laptop.4357 > server.ssh: . ack 11024 win 52096
11.277219 laptop.4357 > server.ssh: . ack 11120 win 52000
11.277271 laptop.4357 > server.ssh: . ack 11264 win 51856
11.277371 laptop.4357 > server.ssh: . ack 11360 win 51760
11.277422 laptop.4357 > server.ssh: . ack 11504 win 51616
11.277517 laptop.4357 > server.ssh: . ack 11600 win 51520
11.277567 laptop.4357 > server.ssh: . ack 11744 win 51376
11.277654 laptop.4357 > server.ssh: . ack 11840 win 51280
11.277717 laptop.4357 > server.ssh: . ack 11968 win 51152
11.277799 laptop.4357 > server.ssh: . ack 12064 win 51056
11.277862 laptop.4357 > server.ssh: . ack 12160 win 50960
11.277944 laptop.4357 > server.ssh: . ack 12288 win 50832
11.278007 laptop.4357 > server.ssh: . ack 12384 win 50736
11.278096 laptop.4357 > server.ssh: . ack 12512 win 50608
11.278147 laptop.4357 > server.ssh: . ack 12608 win 50512
11.278244 laptop.4357 > server.ssh: . ack 12736 win 50384
11.278295 laptop.4357 > server.ssh: . ack 12832 win 50288
11.278380 laptop.4357 > server.ssh: . ack 12880 win 50240
11.278444 laptop.4357 > server.ssh: . ack 12880 win 50240
11.278526 laptop.4357 > server.ssh: . ack 12880 win 50240
11.278589 laptop.4357 > server.ssh: . ack 12880 win 50240
11.278671 laptop.4357 > server.ssh: . ack 12880 win 50240
11.278735 laptop.4357 > server.ssh: . ack 12880 win 50240
11.278818 laptop.4357 > server.ssh: . ack 12880 win 50240
11.278878 laptop.4357 > server.ssh: . ack 12880 win 50240
11.278962 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279026 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279108 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279171 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279253 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279316 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279404 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279454 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279597 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279649 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279699 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279750 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279834 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279898 laptop.4357 > server.ssh: . ack 12880 win 50240
11.279980 laptop.4357 > server.ssh: . ack 12880 win 50240
11.280041 laptop.4357 > server.ssh: . ack 12880 win 50240
11.280126 laptop.4357 > server.ssh: . ack 12880 win 50240
11.280197 laptop.4357 > server.ssh: . ack 12880 win 50240
11.280261 laptop.4357 > server.ssh: . ack 12880 win 50240
11.280344 laptop.4357 > server.ssh: . ack 12880 win 50240
11.283107 server.ssh > laptop.4357: . 12880:14328(1448) ack 2456 win 57920
11.283529 laptop.4357 > server.ssh: . ack 15856 win 54944
11.283872 laptop.4357 > server.ssh: . ack 15856 win 57920
11.286098 server.ssh > laptop.4357: . 15856:17304(1448) ack 2456 win 57920
11.286337 laptop.4357 > server.ssh: . ack 17488 win 56288
12.247106 laptop.4357 > server.ssh: . ack 17488 win 57920
12.484824 server.ssh > laptop.4357: . 17488:18936(1448) ack 2456 win 57920
12.485107 laptop.4357 > server.ssh: . ack 18976 win 56432
13.684779 server.ssh > laptop.4357: . 18976:20424(1448) ack 2456 win 57920
13.685086 laptop.4357 > server.ssh: . ack 22976 win 53920
13.685439 laptop.4357 > server.ssh: . ack 22976 win 57920
13.702095 laptop.4357 > server.ssh: P 2456:2504(48) ack 22976 win 57920
13.702625 server.ssh > laptop.4357: P 22976:23072(96) ack 2504 win 57920
13.716726 laptop.4357 > server.ssh: P 2504:2696(192) ack 23072 win 57920
13.717478 server.ssh > laptop.4357: P 23072:23184(112) ack 2696 win 57920
[deleted]
Peter
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