7 Apr
2016
7 Apr
'16
6:57 a.m.
Hi all,
I’ve been having a constant noisy signal lately using jacktrip 1.1 and jack audio 0.92
beta3 on El Capitan.
No noise running locally; but always from U.S. to China on ipv6. We’ve even had trouble
with initializing an
8 channel stream; had to go with 4. Never had this trouble before.
The connection is virtually jitter-less with 0 packet loss and 80M in the clear.
doing some experiments with jacktrip and Wireshark today - all on the local network.
I find that with larger data chunks (over about 1500k), the packets can be fragmented 2 or
3 times or more.
Where does the fragmenting happen, on sender side? In transit?
Would the machine ever have any problem ‘reassembling” the chunks?
Thanks,
Ken
stereo 48k 24bit connection:
buffer 512
3 FRAGS
OVER IPV6
315345 2454.541857 2001:da8:22b:1506:12dd:b1ff:febd:8a2e 2001:da8:22b:1506:ca2a:14ff:fe34:2beb IPv6 1510 IPv6
fragment (off=0 more=y ident=0xf68b8b47 nxt=17)
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)
315347 2454.541863 2001:da8:22b:1506:12dd:b1ff:febd:8a2e 2001:da8:22b:1506:ca2a:14ff:fe34:2beb UDP 262
4464 → 4464 Len=3088 4464 4464
OVER IPV4
488313 2895.589371 10.1.8.32 10.1.8.39
IPv4 1514 Fragmented IP protocol (proto=UDP 17, off=0, ID=2841) [Reassembled
in #488315]
488314 2895.589383 10.1.8.32 10.1.8.39 IPv4 1514 Fragmented IP protocol
(proto=UDP 17, off=1480, ID=2841) [Reassembled in #488315]
488315 2895.589385 10.1.8.32 10.1.8.39 UDP 170 4464 → 4464
Len=3088 4464 4464
[3 IPv4 Fragments (3096 bytes): #744530(1480), #744531(1480), #744532(136)]
[Frame: 744530, payload: 0-1479 (1480 bytes)]
[Frame: 744531, payload: 1480-2959 (1480 bytes)]
[Frame: 744532, payload: 2960-3095 (136 bytes)]
[Fragment count: 3]
[Reassembled IPv4 length: 3096]
[Reassembled IPv4 data: 117011700c18119cc7a5b325e02f050002a7000203180200...]
MONO 44k 16 bit, buffer 128 - NO FRAGS
878806 3832.932229 10.1.8.39 10.1.8.32 UDP 314 4464 → 4464 Len=272 4464 4464
1006386 4103.078745 2001:da8:22b:1506:ca2a:14ff:fe34:2beb 2001:da8:22b:1506:12dd:b1ff:febd:8a2e UDP 334 4465
→ 4465 Len=272 4465 4465
STEREO 16 bit, buffer 128 - NO FRAGS
1088352 4253.388686 2001:da8:22b:1506:ca2a:14ff:fe34:2beb 2001:da8:22b:1506:12dd:b1ff:febd:8a2e UDP 590 4464
→ 4464 Len=528 4464 4464
Buffer 256 16bit - NO FRAGS
1267127 4884.016193 2001:da8:22b:1506:ca2a:14ff:fe34:2beb 2001:da8:22b:1506:12dd:b1ff:febd:8a2e UDP 1102 4469
→ 4469 Len=1040 4469 4469
Buffer 256 24bit - 2 FRAGS
1326725 5095.511528 2001:da8:22b:1506:ca2a:14ff:fe34:2beb 2001:da8:22b:1506:12dd:b1ff:febd:8a2e IPv6 1510 IPv6
fragment (off=0 more=y ident=0x486bd035 nxt=17)
1326726 5095.511529 2001:da8:22b:1506:ca2a:14ff:fe34:2beb 2001:da8:22b:1506:12dd:b1ff:febd:8a2e UDP 174 4471
→ 4471 Len=1552 4471 4471
1528363 5497.529358 10.1.8.32 10.1.8.39 IPv4 1514 Fragmented IP protocol
(proto=UDP 17, off=0, ID=a448) [Reassembled in #1528364]
1528364 5497.529361 10.1.8.32 10.1.8.39 UDP 114 4473 → 4473
Len=1552 4473 4473