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benadlard's avatar
benadlard
Joining in
12 days ago

Poor internet connection when camera connected to network

Hi all,

I am using a Hub 5 in modem mode. The modem is connected to a Unifi dream router, this in turn is connected to a switch and a camera is connected to that powered by poe. Now the problem is, I've noticed over the past couple of weeks that the camera although permanently online switches between a Excellent and Poor connection experience.

I've tried the following things with no joy:

  • plugging the camera directly into the router
  • I've replaced cables
  • I've removed custom firewall rules
  • I've tried hard resetting the camera
  • I've rebooted the router
  • Given the camera fixed IP address

The unifi network health during this time looks fine, nothing untoward.

I then turned my focus on the modem and have been examining the Network logs. I've noticed these critical entries over the past few days. Do these mean anything to anyone? Any help would be greatly appreciated.

16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;

Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;

Ben

 

  • jpeg1's avatar
    jpeg1
    Alessandro Volta

    Check the Hub stats for signal noise - RS errors 

  • Tudor's avatar
    Tudor
    Very Insightful Person

    I use a large amount of Ubiquiti equipment with hub in modem mode with no problems, possibly a circuit problem. Please post a full set of stats:

    How to get stats from a VM hub (no need to logon to the hub)

    Open a web browser and go to 192.168.0.1 router mode or 192.168.100.1 modem mode

    • Click on the “> Check router status” button
    • Click on the “Downstream” tab, copy the text and paste into your reply, do not take a screen shot
    • Click on the “Upstream” tab, copy the text and paste into your reply
    • Click on the “Networking” tab, copy the text and paste into your reply.
      • Do NOT post photos or screen shots they will be rejected as they contain MAC addresses. The board software will automatically change MAC addresses to **:** if done as above.
  • Thank you Tudor and Alessandro. Yes, I use predominately Ubiquiti equipment, let me be more specific about my devices. So I have my Hub 5 connected to the UDR, I have a USW Lite 8 PoE switch connected to the UDR that my G3 Flex is plugged into. The switch has it's own power supply. A U6-AP is also connected to the switch along with my NAS.

    I have 4 VLANs, Default, Camera, IoT and Guest. However, the same connection issues occur if I more the camera between the Camera and Default VLANs.

    As requested, here is the network info (see next reply).

  • 3.0 Downstream channels
    
    Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
    1	194000000	6.3	41	QAM 256	8
    2	202000000	6.4	41	QAM 256	9
    3	210000000	6.9	41	QAM 256	10
    4	218000000	6.9	41	QAM 256	11
    5	226000000	6.6	41	QAM 256	12
    6	234000000	6.6	41	QAM 256	13
    7	242000000	6.4	41	QAM 256	14
    8	250000000	6.6	42	QAM 256	15
    9	258000000	6.7	42	QAM 256	16
    10	266000000	6.6	41	QAM 256	17
    11	274000000	6.7	41	QAM 256	18
    12	282000000	6.7	42	QAM 256	19
    13	290000000	7.1	42	QAM 256	20
    14	298000000	6.9	42	QAM 256	21
    15	306000000	6.9	41	QAM 256	22
    16	314000000	6.8	42	QAM 256	23
    17	322000000	6.5	41	QAM 256	24
    18	330000000	6.6	42	QAM 256	25
    19	338000000	6.9	42	QAM 256	26
    20	346000000	6.9	42	QAM 256	27
    21	354000000	7.3	42	QAM 256	28
    22	362000000	7.2	42	QAM 256	29
    23	370000000	7.3	42	QAM 256	30
    24	378000000	7.6	42	QAM 256	31
    25	386000000	7.6	42	QAM 256	32
    26	394000000	7.7	42	QAM 256	33
    27	402000000	7.7	42	QAM 256	34
    28	410000000	7.4	42	QAM 256	35
    29	418000000	7.3	42	QAM 256	36
    30	522000000	7.7	42	QAM 256	37
    31	530000000	8.1	41	QAM 256	38
    
    3.0 Downstream channels
    
    Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
    1	Locked	41	0	0
    2	Locked	41	0	0
    3	Locked	41	0	0
    4	Locked	41	0	0
    5	Locked	41	0	0
    6	Locked	41	0	0
    7	Locked	41	0	0
    8	Locked	42	0	0
    9	Locked	42	0	0
    10	Locked	41	0	0
    11	Locked	41	0	0
    12	Locked	42	0	0
    13	Locked	42	1	0
    14	Locked	42	2	0
    15	Locked	41	2	0
    16	Locked	42	1	0
    17	Locked	41	3	0
    18	Locked	42	2	0
    19	Locked	42	1	0
    20	Locked	42	2	0
    21	Locked	42	3	0
    22	Locked	42	3	0
    23	Locked	42	3	0
    24	Locked	42	3	0
    25	Locked	42	3	0
    26	Locked	42	4	0
    27	Locked	42	1	0
    28	Locked	42	2	0
    29	Locked	42	3	0
    30	Locked	42	0	0
    31	Locked	41	2	0
    
    3.1 Downstream channels
    
    Channel	Channel Width (MHz)	FFT Type	Number of Active Subcarriers	Modulation (Active Profile)	First Active Subcarrier (Hz)
    39	92	4K	1800	QAM 4096	1128
    3.1 Downstream channels
    
    Channel ID	Locked Status	RxMER Data (dB)	PLC Power (dBmV)	Corrected errors (Active Profile)	Uncorrectable errors (Active Profile)
    39	Locked	42	7.2	2119346577	5275

     

  • 3.0 Upstream channels
    
    Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
    0	49600000	42	5120	QAM 64	6
    1	43100000	41.8	5120	QAM 64	7
    2	36600000	41	5120	QAM 64	8
    3	30100000	40.3	5120	QAM 64	9
    4	23600000	39.8	5120	QAM 64	10
    
    3.0 Upstream channels
    
    Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
    0	ATDMA	0	0	0	0
    1	ATDMA	0	0	0	0
    2	ATDMA	0	0	0	0
    3	ATDMA	0	0	0	0
    4	ATDMA	0	0	1	0
    
    3.1 Upstream channels
    
    Channel	Channel Width (MHz)	Power (dBmV)	FFT Type	Modulation
    14	10.4	36.2	2K	QAM 256
    
    3.1 Upstream channels
    
    Channel	Channel Type	Number of Active Subcarriers	First Active Subcarrier (Hz)	T3 Timeouts	T4 Timeouts
    14	OFDMA	208	74000000	0	0

     

  • Apologies, the text input reply box would not allow me to directly copy and paste. I received invalid HTML issues, hence the code view entries

  • Time	Priority	Description
    01-02-2025 07:21:14	notice	GUI Login Status - Login Success from LAN interface
    01-02-2025 01:35:34	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    31-01-2025 21:44:29	notice	GUI Login Status - Login Success from LAN interface
    31-01-2025 21:07:01	notice	GUI Login Status - Login Success from LAN interface
    31-01-2025 20:53:18	notice	GUI Login Status - Login Success from LAN interface
    31-01-2025 20:38:24	notice	GUI Login Status - Login Success from LAN interface
    31-01-2025 20:35:33	notice	GUI Login Status - Login Fail from LAN interface
    31-01-2025 14:55:12	error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    31-01-2025 08:26:31	notice	US profile assignment change. US Chan ID: 14; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    31-01-2025 07:22:43	notice	US profile assignment change. US Chan ID: 14; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    31-01-2025 05:15:06	notice	US profile assignment change. US Chan ID: 14; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    31-01-2025 04:11:17	notice	US profile assignment change. US Chan ID: 14; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    30-01-2025 16:34:23	notice	REGISTRATION COMPLETE - Waiting for Operational status
    30-01-2025 16:34:13	notice	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    30-01-2025 16:34:13	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    30-01-2025 16:34:09	notice	TLV-11 - unrecognized OID;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    30-01-2025 16:34:07	warning	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    30-01-2025 16:34:05	notice	Honoring MDD; IP provisioning mode = IPv4
    30-01-2025 16:33:57	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    30-01-2025 16:33:57	critical	Cable Modem Reboot because of - HW or Power-On Reset
    25-01-2025 18:45:06	critical	16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    25-01-2025 18:45:06	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    25-01-2025 18:43:58	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    18-01-2025 17:12:01	critical	No Ranging Response received - T3 time-out;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    15-01-2025 14:46:32	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    15-01-2025 14:46:19	critical	No Ranging Response received - T3 time-out;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    15-01-2025 14:46:14	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    15-01-2025 14:46:13	critical	Cable Modem Reboot because of - HW or Power-On Reset
    08-01-2025 14:29:47	critical	16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:47	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:23	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:18	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:18	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:18	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:16	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:16	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:16	critical	16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;
    08-01-2025 14:29:13	critical	16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=9c:24:72:4c:4f:83;CMTS-MAC=00:01:5c:83:84:51;CM-QOS=1.1;CM-VER=3.1;