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Subject: |
PVAccess UDP/TCP connections failing - no more data in UDP packet |
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From: |
Kacper Kłys DMCS via Tech-talk <[email protected]> |
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To: |
[email protected] |
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Date: |
Wed, 29 Oct 2025 00:24:21 +0100 |
Hi guys,
I have a problem with the PVA connection with my IOC hosted on the ARM
buildroot-based system. Even though the IOC claims that the PVA server
is up and running, I cannot use pvget to read any PVs. I tried using
pvget from the same host and another server from the same subnet. The
PVs are available over CA, and there are no problems with reading them
using CA.
I'm using EPICS 7.0.7, PVA configuration on the IOC side:
pvAccess Server v7.1.6
Active configuration (w/ defaults)
EPICS_PVAS_INTF_ADDR_LIST = 10.1.6.3:5075
EPICS_PVAS_BEACON_ADDR_LIST =
EPICS_PVAS_AUTO_BEACON_ADDR_LIST = YES
EPICS_PVAS_BEACON_PERIOD = 15
EPICS_PVAS_BROADCAST_PORT = 5076
EPICS_PVAS_SERVER_PORT = 5075
EPICS_PVAS_PROVIDER_NAMES = QSRV
As far as I understand logs, the pvget is able to find PV via UDP, but
later, there is no TCP connection for data transmission. I tested
PVA-related ports - they are open. In the system, there is no running
firewall. To eliminate the influence of any network filtration,
switches, etc, I connected my pc to the server with IOC via Ethernet
cable - still could not read any PV via PVA.
The client and IOC console are full of messages like:
Error on UDP RX 10.1.6.3:43426 -> 0.0.0.0:54341 at 77 : no more data in
UDP packet : 77:77 for 4
0x00 ca024004 2d000000 c9490169 00000000 ..@. -... .I.i ....
0x10 47435038 04000000 00000000 00000000 GCP8 .... .... ....
0x20 0000ffff 0a010603 d3130374 63700100 .... .... ...t cp..
0x30 41302000 00 A0 . .
2025-10-28T23:55:18.920 Sending 72 bytes 0.0.0.0:54341 -> 10.1.6.253:5076.
2025-10-28T23:55:18.920 Sending 72 bytes 0.0.0.0:54341 -> 10.1.6.3:5076.
2025-10-28T23:55:18.932 UDP Client Rx (53) 0.0.0.0:54341 <- 10.1.6.3:43426
I'm attaching full logs from the IOC console and pvget debug mode.
I'd be grateful for any tips on how to fix this.
Cheers
Kacper Starting iocInit
############################################################################
## EPICS R7.0.7
## Rev. 2025-10-21T16:47+0200
## Rev. Date build date/time:
############################################################################
2025-10-28T22:55:04.986 Creating datagram socket from: 0.0.0.0:54113.
2025-10-28T22:55:04.988 Broadcast address #0: 10.1.6.255:5076. (not unicast)
2025-10-28T22:55:04.991 Setting up UDP for interface 10.1.6.3/255.255.255.0, broadcast 10.1.6.255, dest <none>.
2025-10-28T22:55:04.993 Creating datagram socket from: 10.1.6.3:5076.
2025-10-28T22:55:04.994 Creating datagram socket from: 10.1.6.255:5076.
2025-10-28T22:55:04.999 Creating datagram socket from: 224.0.0.128:5076.
2025-10-28T22:55:05.002 Local multicast enabled on 127.0.0.1/224.0.0.128:5076.
iocRun: All initialization complete
2025-10-28T22:55:05.956 Creating acceptor to 10.1.6.3:5075.
2025-10-28T22:55:05.957 Accepting connections at 10.1.6.3:5075.
2025-10-28T22:55:05.960 Creating datagram socket from: 0.0.0.0:43426.
2025-10-28T22:55:05.962 Broadcast address #0: 10.1.6.255:5076. (not unicast)
2025-10-28T22:55:05.972 Setting up UDP for interface 10.1.6.3/255.255.255.0, broadcast 10.1.6.255, dest <none>.
2025-10-28T22:55:05.973 Creating datagram socket from: 10.1.6.3:5076.
2025-10-28T22:55:05.977 Creating datagram socket from: 10.1.6.255:5076.
2025-10-28T22:55:05.999 Creating datagram socket from: 224.0.0.128:5076.
2025-10-28T22:55:06.010 Local multicast enabled on 127.0.0.1/224.0.0.128:5076.
2025-10-28T22:55:06.012 Sending 47 bytes 0.0.0.0:43426 -> 10.1.6.255:5076.
2025-10-28T22:55:06.012 UDP Client Rx (47) 10.1.6.255:5076 <- 10.1.6.3:43426
Message [0, v0x2] received from 10.1.6.3:43426 on 10.1.6.255:5076 : Beacon
0x00 0xc90x490x10x69 00000000 0x470x430x500x38 00000000 .I.i .... GCP8 ....
0x0x10 00000000 00000000 00000xff0xff 0xa0x10x60x3 .... .... .... ....
0x0x20 0xd30x130x30x74 0x630x700xff ...t cp.
2025-10-28T22:55:06.015 UDP Server Rx (47) 10.1.6.255:5076 <- 10.1.6.3:43426
Message [0, v0x2] received from 10.1.6.3:43426 on 10.1.6.255:5076 : Beacon
0x00 0xc90x490x10x69 00000000 0x470x430x500x38 00000000 .I.i .... GCP8 ....
0x0x10 00000000 00000000 00000xff0xff 0xa0x10x60x3 .... .... .... ....
0x0x20 0xd30x130x30x74 0x630x700xff ...t cp.
date
2025/10/28 22:55:06.020663
epics> 2025-10-28T22:55:15.538 UDP Server Rx (72) 10.1.6.3:5076 <- 10.1.6.1:54341
Message [0x3, v0x2] received from 10.1.6.1:54341 on 10.1.6.3:5076 : Search request
0x00 0x1000000 0x80000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 00000000 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:15.542 UDP Tx (96) 10.1.6.3:5076 -> 224.0.0.128:5076.
2025-10-28T22:55:15.542 UDP Client Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search
0x00 0x1000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:15.545 UDP Server Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search request
0x00 0x1000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:15.549 Sending 53 bytes 0.0.0.0:43426 -> 10.1.6.1:54341.
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 01000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 45d40103 74637001 .... .... E... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
2025-10-28T22:55:15.764 UDP Server Rx (72) 10.1.6.3:5076 <- 10.1.6.1:54341
Message [0x3, v0x2] received from 10.1.6.1:54341 on 10.1.6.3:5076 : Search request
0x00 0x2000000 0x80000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 00000000 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:15.767 UDP Tx (96) 10.1.6.3:5076 -> 224.0.0.128:5076.
2025-10-28T22:55:15.768 UDP Client Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search
0x00 0x2000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:15.771 UDP Server Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search request
0x00 0x2000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:15.775 Sending 53 bytes 0.0.0.0:43426 -> 10.1.6.1:54341.
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 02000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 45d40103 74637001 .... .... E... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
2025-10-28T22:55:16.214 UDP Server Rx (72) 10.1.6.3:5076 <- 10.1.6.1:54341
Message [0x3, v0x2] received from 10.1.6.1:54341 on 10.1.6.3:5076 : Search request
0x00 0x3000000 0x80000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 00000000 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:16.218 UDP Tx (96) 10.1.6.3:5076 -> 224.0.0.128:5076.
2025-10-28T22:55:16.218 UDP Client Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search
0x00 0x3000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:16.222 UDP Server Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search request
0x00 0x3000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:16.225 Sending 53 bytes 0.0.0.0:43426 -> 10.1.6.1:54341.
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 03000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 45d40103 74637001 .... .... E... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
2025-10-28T22:55:17.116 UDP Server Rx (72) 10.1.6.3:5076 <- 10.1.6.1:54341
Message [0x3, v0x2] received from 10.1.6.1:54341 on 10.1.6.3:5076 : Search request
0x00 0x4000000 0x80000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 00000000 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:17.119 UDP Tx (96) 10.1.6.3:5076 -> 224.0.0.128:5076.
2025-10-28T22:55:17.120 UDP Client Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search
0x00 0x4000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:17.123 UDP Server Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search request
0x00 0x4000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:17.127 Sending 53 bytes 0.0.0.0:43426 -> 10.1.6.1:54341.
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 04000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 45d40103 74637001 .... .... E... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
2025-10-28T22:55:18.919 UDP Server Rx (72) 10.1.6.3:5076 <- 10.1.6.1:54341
Message [0x3, v0x2] received from 10.1.6.1:54341 on 10.1.6.3:5076 : Search request
0x00 0x5000000 0x80000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 00000000 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:18.922 UDP Tx (96) 10.1.6.3:5076 -> 224.0.0.128:5076.
2025-10-28T22:55:18.923 UDP Client Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search
0x00 0x5000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:18.927 UDP Server Rx (96) 224.0.0.128:5076 <- 10.1.6.3:5076
Message [0x3, v0x2] received from 10.1.6.3:5076 on 224.0.0.128:5076 : Search request
0x00 0x5000000 00000000 00000000 00000000 .... .... .... ....
0x0x10 00000xff0xff 0xa0x10x60x1 0x450xd40x10x3 0x740x630x700x1 .... .... E... tcp.
0x0x20 000x410x300x20 0x100x1a0x540x65 0x730x740x3a0x70 0x760x730x5f0x4b .A0 ..Te st:p vs_K
0x0x30 0x430x360x5f0x69 0x6e0x610x3a0x56 0x650x720x730x69 0x6f0x6e0x5f0x72 C6_i na:V ersi on_r
2025-10-28T22:55:18.930 Sending 53 bytes 0.0.0.0:43426 -> 10.1.6.1:54341.
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 05000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 45d40103 74637001 .... .... E... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
2025-10-28T22:55:21.018 Sending 47 bytes 0.0.0.0:43426 -> 10.1.6.255:5076.
2025-10-28T22:55:21.018 UDP Client Rx (47) 10.1.6.255:5076 <- 10.1.6.3:43426
Message [0, v0x2] received from 10.1.6.3:43426 on 10.1.6.255:5076 : Beacon
0x00 0xc90x490x10x69 00000000 0x470x430x500x38 000x10000 .I.i .... GCP8 ....
0x0x10 00000000 00000000 00000xff0xff 0xa0x10x60x3 .... .... .... ....
0x0x20 0xd30x130x30x74 0x630x700xff ...t cp.
2025-10-28T22:55:21.020 UDP Server Rx (47) 10.1.6.255:5076 <- 10.1.6.3:43426
Message [0, v0x2] received from 10.1.6.3:43426 on 10.1.6.255:5076 : Beacon
0x00 0xc90x490x10x69 00000000 0x470x430x500x38 000x10000 .I.i .... GCP8 ....
0x0x10 00000000 00000000 00000xff0xff 0xa0x10x60x3 .... .... .... ....
0x0x20 0xd30x130x30x74 0x630x700xff ...t cp.
epics> Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 01000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 36930103 74637001 .... .... 6... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 02000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 36930103 74637001 .... .... 6... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 03000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 36930103 74637001 .... .... 6... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 04000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 36930103 74637001 .... .... 6... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 05000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 36930103 74637001 .... .... 6... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
Error on UDP RX 10.1.6.3:5076 -> 224.0.0.128:5076 at 120 : no more data in UDP packet : 120:120 for 4
0x00 ca020016 10000000 00000000 00000000 .... .... .... ....
0x10 0000ffff 0a010603 ca020003 40000000 .... .... .... @...
0x20 06000000 00000000 00000000 00000000 .... .... .... ....
0x30 0000ffff 0a010601 36930103 74637001 .... .... 6... tcp.
0x40 00413020 101a5465 73743a70 76735f4b .A0 ..Te st:p vs_K
0x50 43365f69 6e613a56 65727369 6f6e5f72 C6_i na:V ersi on_r
pvget Test:pvs_KC6_ina:Version_r -d
2025-10-28T23:53:21.419 Creating datagram socket from: 0.0.0.0:37686.
2025-10-28T23:53:21.419 Broadcast address #0: 10.1.6.253:5076. (unicast)
2025-10-28T23:53:21.419 Broadcast address #1: 10.1.6.3:5076. (unicast)
2025-10-28T23:53:21.419 Setting up UDP for interface 10.1.6.1/255.255.255.0, broadcast 10.1.6.255, dest <none>.
2025-10-28T23:53:21.419 Creating datagram socket from: 10.1.6.1:5076.
2025-10-28T23:53:21.419 Creating datagram socket from: 10.1.6.255:5076.
2025-10-28T23:53:21.419 Setting up UDP for interface 172.17.0.1/255.255.0.0, broadcast 172.17.255.255, dest <none>.
2025-10-28T23:53:21.419 Creating datagram socket from: 172.17.0.1:5076.
2025-10-28T23:53:21.419 Creating datagram socket from: 172.17.255.255:5076.
2025-10-28T23:53:21.419 Setting up UDP for interface 172.18.0.1/255.255.0.0, broadcast 172.18.255.255, dest <none>.
2025-10-28T23:53:21.419 Creating datagram socket from: 172.18.0.1:5076.
2025-10-28T23:53:21.419 Creating datagram socket from: 172.18.255.255:5076.
2025-10-28T23:53:21.419 Creating datagram socket from: 224.0.0.128:5076.
2025-10-28T23:53:21.419 Local multicast enabled on 127.0.0.1/224.0.0.128:5076.
2025-10-28T23:53:21.419 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.253:5076.
2025-10-28T23:53:21.420 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.3:5076.
Waiting...
2025-10-28T23:53:21.421 UDP Client Rx (53) 0.0.0.0:37686 <- 10.1.6.3:54318
Error on UDP RX 10.1.6.3:54318 -> 0.0.0.0:37686 at 77 : no more data in UDP packet : 77:77 for 4
0x00 ca024004 2d000000 5a490169 00000000 ..@. -... ZI.i ....
0x10 47d59637 01000000 00000000 00000000 G..7 .... .... ....
0x20 0000ffff 0a010603 d3130374 63700100 .... .... ...t cp..
0x30 41302000 00 A0 . .
2025-10-28T23:53:21.661 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.253:5076.
2025-10-28T23:53:21.661 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.3:5076.
2025-10-28T23:53:21.663 UDP Client Rx (53) 0.0.0.0:37686 <- 10.1.6.3:54318
Error on UDP RX 10.1.6.3:54318 -> 0.0.0.0:37686 at 77 : no more data in UDP packet : 77:77 for 4
0x00 ca024004 2d000000 5a490169 00000000 ..@. -... ZI.i ....
0x10 47d59637 02000000 00000000 00000000 G..7 .... .... ....
0x20 0000ffff 0a010603 d3130374 63700100 .... .... ...t cp..
0x30 41302000 00 A0 . .
2025-10-28T23:53:22.144 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.253:5076.
2025-10-28T23:53:22.144 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.3:5076.
2025-10-28T23:53:22.146 UDP Client Rx (53) 0.0.0.0:37686 <- 10.1.6.3:54318
Error on UDP RX 10.1.6.3:54318 -> 0.0.0.0:37686 at 77 : no more data in UDP packet : 77:77 for 4
0x00 ca024004 2d000000 5a490169 00000000 ..@. -... ZI.i ....
0x10 47d59637 03000000 00000000 00000000 G..7 .... .... ....
0x20 0000ffff 0a010603 d3130374 63700100 .... .... ...t cp..
0x30 41302000 00 A0 . .
2025-10-28T23:53:23.111 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.253:5076.
2025-10-28T23:53:23.111 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.3:5076.
2025-10-28T23:53:23.112 UDP Client Rx (53) 0.0.0.0:37686 <- 10.1.6.3:54318
Error on UDP RX 10.1.6.3:54318 -> 0.0.0.0:37686 at 77 : no more data in UDP packet : 77:77 for 4
0x00 ca024004 2d000000 5a490169 00000000 ..@. -... ZI.i ....
0x10 47d59637 04000000 00000000 00000000 G..7 .... .... ....
0x20 0000ffff 0a010603 d3130374 63700100 .... .... ...t cp..
0x30 41302000 00 A0 . .
2025-10-28T23:53:25.043 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.253:5076.
2025-10-28T23:53:25.043 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.3:5076.
2025-10-28T23:53:25.044 UDP Client Rx (53) 0.0.0.0:37686 <- 10.1.6.3:54318
Error on UDP RX 10.1.6.3:54318 -> 0.0.0.0:37686 at 77 : no more data in UDP packet : 77:77 for 4
0x00 ca024004 2d000000 5a490169 00000000 ..@. -... ZI.i ....
0x10 47d59637 05000000 00000000 00000000 G..7 .... .... ....
0x20 0000ffff 0a010603 d3130374 63700100 .... .... ...t cp..
0x30 41302000 00 A0 . .
2025-10-28T23:53:26.160 UDP Client Rx (47) 10.1.6.255:5076 <- 10.1.6.201:44207
2025-10-28T23:53:26.160 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.253:5076.
2025-10-28T23:53:26.160 Sending 72 bytes 0.0.0.0:37686 -> 10.1.6.3:5076.
2025-10-28T23:53:26.161 UDP Client Rx (53) 0.0.0.0:37686 <- 10.1.6.3:54318
Error on UDP RX 10.1.6.3:54318 -> 0.0.0.0:37686 at 77 : no more data in UDP packet : 77:77 for 4
0x00 ca024004 2d000000 5a490169 00000000 ..@. -... ZI.i ....
0x10 47d59637 06000000 00000000 00000000 G..7 .... .... ....
0x20 0000ffff 0a010603 d3130374 63700100 .... .... ...t cp..
0x30 41302000 00 A0 . .
Timeout
Test:pvs_KC6_ina:Version_r 2025-10-28T23:53:26.420 UDP socket 0.0.0.0:0 closed.
2025-10-28T23:53:26.420 UDP Client Rx (0) 0.0.0.0:37686 <- 10.1.6.3:54318
2025-10-28T23:53:26.420 UDP socket 10.1.6.1:5076 closed.
2025-10-28T23:53:26.420 UDP Client Rx (0) 10.1.6.1:5076 <- <Ukn Addr Type>
2025-10-28T23:53:26.420 UDP socket 10.1.6.255:5076 closed.
2025-10-28T23:53:26.421 UDP Client Rx (0) 10.1.6.255:5076 <- 10.1.6.201:44207
2025-10-28T23:53:26.421 UDP socket 172.17.0.1:5076 closed.
2025-10-28T23:53:26.421 UDP Client Rx (0) 172.17.0.1:5076 <- <Ukn Addr Type>
2025-10-28T23:53:26.421 UDP socket 172.17.255.255:5076 closed.
2025-10-28T23:53:26.421 UDP Client Rx (0) 172.17.255.255:5076 <- <Ukn Addr Type>
2025-10-28T23:53:26.421 UDP socket 172.18.0.1:5076 closed.
2025-10-28T23:53:26.421 UDP Client Rx (0) 172.18.0.1:5076 <- <Ukn Addr Type>
2025-10-28T23:53:26.421 UDP socket 172.18.255.255:5076 closed.
2025-10-28T23:53:26.421 UDP Client Rx (0) 172.18.255.255:5076 <- <Ukn Addr Type>
2025-10-28T23:53:26.421 UDP socket 224.0.0.128:5076 closed.
2025-10-28T23:53:26.422 UDP Client Rx (0) 224.0.0.128:5076 <- <Ukn Addr Type>
Done
- Replies:
- Re: PVAccess UDP/TCP connections failing - no more data in UDP packet Michael Davidsaver via Tech-talk
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Re: writing a value of a string PV to a waveform PV in another IOC Johnson, Andrew N. via Tech-talk
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