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The fragmenting can happen at literally any point between the two
hosts. There is almost certainly nothing you can do about it. Any
"hop" along the way has the right to split packets if it feels it's
necessary. If the trouble started recently, you should contact your
ISPs to complain.<br>
<br>
For troubleshooting, you might try running a cable directly between
the two affected hosts. Make sure you choose a media format that
supports long distances. I don't think CAT6 will go to China without
repeaters, and that would defeat the purpose.<br>
<br>
If the issue is that the route your packets take has changed, maybe
you can find a VPN provider who will treat your packets better? I
have many friends here in Texas who pay monthly for a VPN to New
York because routing Netflix through it is faster than going
straight to Comcast.<br>
<br>
David<br>
<br>
PS - I can't speak for the audio industry, as I'm in web hosting,
where dark humor is our only defense against the knowledge that the
worst technology will almost always win. JavaScript, PHP, VHS, x86
processors with segment:offset addressing...<br>
<br>
<div class="moz-cite-prefix">On 04/07/16 06:57, Kenneth Fields
wrote:<br>
</div>
<blockquote
cite="mid:23DB0425-4861-4AF4-BCB1-0912995DEBA4@gmail.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<div class="" style="font-size: 14px;">Hi all,</div>
<div class="" style="font-size: 14px;">I’ve been having a constant
noisy signal lately using jacktrip 1.1 and jack audio 0.92 beta3
on El Capitan.</div>
<div class="" style="font-size: 14px;">No noise running locally;
but always from U.S. to China on ipv6. We’ve even had trouble
with initializing an </div>
<div class="" style="font-size: 14px;">8 channel stream; had to go
with 4. Never had this trouble before.</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">The connection is virtually
jitter-less with 0 packet loss and 80M in the clear.</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">doing some experiments with
jacktrip and Wireshark today - all on the local network.</div>
<div class="" style="font-size: 14px;">I find that with larger
data chunks (over about 1500k), the packets can be fragmented 2
or 3 times or more.</div>
<div class="" style="font-size: 14px;">Where does the fragmenting
happen, on sender side? In transit?</div>
<div class="" style="font-size: 14px;">Would the machine ever have
any problem ‘reassembling” the chunks?</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">Thanks,</div>
<div class="" style="font-size: 14px;">Ken</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">
<div class="" style="font-size: 15px;"><b class="">stereo 48k
24bit connection:</b></div>
<div class="" style="font-size: 15px;"><b class="">buffer 512</b></div>
<div class="" style="font-size: 13px;"><b class="">3 FRAGS</b></div>
<div class="" style="font-size: 18px;"><br class="">
</div>
</div>
<div class="" style="font-size: 14px;"><b class="">OVER IPV6</b></div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<span class="" style="font-size: 14px;">315345</span><span class="Apple-tab-span" style="font-size: 14px; white-space: pre;"> </span><span
class="" style="font-size: 14px;">2454.541857</span><span class="Apple-tab-span" style="font-size: 14px; white-space: pre;"> </span><span
class="" style="font-size: 14px;">2001:da8:22b:1506:12dd:b1ff:febd:8a2e</span><span class="Apple-tab-span" style="font-size: 14px; white-space: pre;"> </span><span
class="" style="font-size: 14px;">2001:da8:22b:1506:ca2a:14ff:fe34:2beb</span><span class="Apple-tab-span" style="font-size: 14px; white-space: pre;"> </span><span
class="" style="font-size: 14px;">IPv6</span><span class="Apple-tab-span" style="font-size: 14px; white-space: pre;"> </span><span
class="" style="font-size: 14px;">1510</span><span class="Apple-tab-span" style="font-size: 14px; white-space: pre;"> </span><span
class="" style="font-size: 14px;">IPv6 fragment (off=0 more=y
ident=0xf68b8b47 nxt=17)</span><span class="Apple-tab-span" style="font-size: 14px; white-space: pre;"> </span>
<div class="" style="font-size: 14px;">315346 2454.541861
2001:da8:22b:1506:12dd:b1ff:febd:8a2e
2001:da8:22b:1506:ca2a:14ff:fe34:2beb IPv6
1510 IPv6 fragment (off=1448 more=y ident=0xf68b8b47
nxt=17) </div>
<div class="" style="font-size: 14px;">315347<span class="Apple-tab-span" style="white-space: pre;"> </span>2454.541863<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:12dd:b1ff:febd:8a2e<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:ca2a:14ff:fe34:2beb<span class="Apple-tab-span" style="white-space: pre;"> </span>UDP<span class="Apple-tab-span" style="white-space: pre;"> </span>262<span class="Apple-tab-span" style="white-space: pre;"> </span>
4464 → 4464 Len=3088<span class="Apple-tab-span" style="white-space: pre;"> </span>4464<span class="Apple-tab-span" style="white-space: pre;"> </span>4464</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><b class="">OVER IPV4</b></div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">488313<span class="Apple-tab-span" style="white-space: pre;"> </span>2895.589371<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.32<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.39<span class="Apple-tab-span" style="white-space: pre;"> </span>
IPv4 1514<span class="Apple-tab-span" style="white-space: pre;"> </span>Fragmented
IP protocol (proto=UDP 17, off=0, ID=2841) [Reassembled in
#488315]<span class="Apple-tab-span" style="white-space: pre;"> </span></div>
<div class="" style="font-size: 14px;">488314<span class="Apple-tab-span" style="white-space: pre;"> </span>2895.589383<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.32<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.39<span class="Apple-tab-span" style="white-space: pre;"> </span>IPv4<span class="Apple-tab-span" style="white-space: pre;"> </span>1514
Fragmented IP protocol (proto=UDP 17, off=1480, ID=2841)
[Reassembled in #488315]<span class="Apple-tab-span" style="white-space: pre;"> </span></div>
<div class="" style="font-size: 14px;">488315<span class="Apple-tab-span" style="white-space: pre;"> </span>2895.589385<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.32<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.39<span class="Apple-tab-span" style="white-space: pre;"> </span>UDP 170<span class="Apple-tab-span" style="white-space: pre;"> </span>
4464 → 4464 Len=3088<span class="Apple-tab-span" style="white-space: pre;"> </span>4464<span class="Apple-tab-span" style="white-space: pre;"> </span>4464</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">
<div class="">[3 IPv4 Fragments (3096 bytes): #744530(1480),
#744531(1480), #744532(136)]</div>
<div class=""> [Frame: 744530, payload: 0-1479 (1480 bytes)]</div>
<div class=""> [Frame: 744531, payload: 1480-2959 (1480
bytes)]</div>
<div class=""> [Frame: 744532, payload: 2960-3095 (136
bytes)]</div>
<div class=""> [Fragment count: 3]</div>
<div class=""> [Reassembled IPv4 length: 3096]</div>
<div class=""> [Reassembled IPv4 data:
117011700c18119cc7a5b325e02f050002a7000203180200...]</div>
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><b class="">MONO 44k 16
bit, buffer 128 - <span class="" style="font-size: 11px;">NO
FRAGS</span></b></div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">878806<span class="Apple-tab-span" style="white-space: pre;"> </span>3832.932229<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.39<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.32<span class="Apple-tab-span" style="white-space: pre;"> </span>UDP<span class="Apple-tab-span" style="white-space: pre;"> </span>314<span class="Apple-tab-span" style="white-space: pre;"> </span>4464
→ 4464 Len=272<span class="Apple-tab-span" style="white-space: pre;"> </span>4464<span class="Apple-tab-span" style="white-space: pre;"> </span>4464</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">1006386<span class="Apple-tab-span" style="white-space: pre;"> </span>4103.078745<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:ca2a:14ff:fe34:2beb<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:12dd:b1ff:febd:8a2e<span class="Apple-tab-span" style="white-space: pre;"> </span>UDP<span class="Apple-tab-span" style="white-space: pre;"> </span>334<span class="Apple-tab-span" style="white-space: pre;"> </span>4465
→ 4465 Len=272<span class="Apple-tab-span" style="white-space: pre;"> </span>4465<span class="Apple-tab-span" style="white-space: pre;"> </span>4465</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><b class="">STEREO 16 bit,
buffer 128 - <span class="" style="font-size: 11px;">NO FRAGS</span></b></div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">1088352<span class="Apple-tab-span" style="white-space: pre;"> </span>4253.388686<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:ca2a:14ff:fe34:2beb<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:12dd:b1ff:febd:8a2e<span class="Apple-tab-span" style="white-space: pre;"> </span>UDP<span class="Apple-tab-span" style="white-space: pre;"> </span>590<span class="Apple-tab-span" style="white-space: pre;"> </span>4464
→ 4464 Len=528<span class="Apple-tab-span" style="white-space: pre;"> </span>4464<span class="Apple-tab-span" style="white-space: pre;"> </span>4464</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><b class=""><br class="">
</b></div>
<div class="" style="font-size: 14px;"><b class="">Buffer 256
16bit - <span class="" style="font-size: 12px;">NO FRAGS</span></b></div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">1267127<span class="Apple-tab-span" style="white-space: pre;"> </span>4884.016193<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:ca2a:14ff:fe34:2beb<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:12dd:b1ff:febd:8a2e<span class="Apple-tab-span" style="white-space: pre;"> </span>UDP<span class="Apple-tab-span" style="white-space: pre;"> </span>1102<span class="Apple-tab-span" style="white-space: pre;"> </span>4469
→ 4469 Len=1040<span class="Apple-tab-span" style="white-space: pre;"> </span>4469<span class="Apple-tab-span" style="white-space: pre;"> </span>4469</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><b class="">Buffer 256
24bit -<span class="" style="font-size: 11px;"> 2 FRAGS</span></b></div>
<div class="" style="font-size: 14px;"><b class=""><br class="">
</b></div>
<div class="" style="font-size: 14px;">1326725<span class="Apple-tab-span" style="white-space: pre;"> </span>5095.511528<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:ca2a:14ff:fe34:2beb<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:12dd:b1ff:febd:8a2e<span class="Apple-tab-span" style="white-space: pre;"> </span>IPv6<span class="Apple-tab-span" style="white-space: pre;"> </span>1510<span class="Apple-tab-span" style="white-space: pre;"> </span>IPv6
fragment (off=0 more=y ident=0x486bd035 nxt=17)<span class="Apple-tab-span" style="white-space: pre;"> </span></div>
<div class="" style="font-size: 14px;">1326726<span class="Apple-tab-span" style="white-space: pre;"> </span>5095.511529<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:ca2a:14ff:fe34:2beb<span class="Apple-tab-span" style="white-space: pre;"> </span>2001:da8:22b:1506:12dd:b1ff:febd:8a2e<span class="Apple-tab-span" style="white-space: pre;"> </span>UDP<span class="Apple-tab-span" style="white-space: pre;"> </span>174<span class="Apple-tab-span" style="white-space: pre;"> </span>4471
→ 4471 Len=1552<span class="Apple-tab-span" style="white-space: pre;"> </span>4471<span class="Apple-tab-span" style="white-space: pre;"> </span>4471</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;"><br class="">
</div>
<div class="" style="font-size: 14px;">1528363<span class="Apple-tab-span" style="white-space: pre;"> </span>5497.529358<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.32<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.39<span class="Apple-tab-span" style="white-space: pre;"> </span>IPv4<span class="Apple-tab-span" style="white-space: pre;"> </span>1514<span class="Apple-tab-span" style="white-space: pre;"> </span>Fragmented
IP protocol (proto=UDP 17, off=0, ID=a448) [Reassembled in
#1528364]<span class="Apple-tab-span" style="white-space: pre;"> </span></div>
<div class="" style="font-size: 14px;">1528364<span class="Apple-tab-span" style="white-space: pre;"> </span>5497.529361<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.32<span class="Apple-tab-span" style="white-space: pre;"> </span>10.1.8.39<span class="Apple-tab-span" style="white-space: pre;"> </span>UDP<span class="Apple-tab-span" style="white-space: pre;"> </span>114<span class="Apple-tab-span" style="white-space: pre;"> </span>4473
→ 4473 Len=1552<span class="Apple-tab-span" style="white-space: pre;"> </span>4473<span class="Apple-tab-span" style="white-space: pre;"> </span>4473</div>
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</pre>
</blockquote>
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