ORBI CBR750 requires manually releasing/renewing the IP

[sen4ik]

I have Netgear Orbi CBR750 with RBS750 satellite.

I own this for two month now.

Four days ago, it started dropping internet every 1.5 hours.

Rebooting the router would bring the internet back.

I called Xfinity, the tech came by and he checked the line all the way to the router. He showed me all the reading he got, the gain, the frequencies test and it all looks green. So it is not the cable.

After some digging, I noticed that 1.5 hours corresponds to the Lease Expires time that is present on the Connection Status page.

So I tried hitting Release and than Renew buttons once the internet went down - and that would bring the internet back.

As of right now, I am going to the Connection Status page and doing the release/renew every 1.5 hours.

I am not sure what happened and why it started doing it. It was fine for two months. I didn't update the firmware.

I tried setting up the static IP - it didn't help. It still dies after 1.5 hours.

Any help would be appreciated.

Logs:

[DHCP IP: (192.168.77.3)] to MAC address AC:3C:8E:00:7A:E7, Friday, Oct 22,2021 13:00:53
[DHCP IP: (192.168.77.14)] to MAC address 3E:C8:09:FA:E3:B8, Friday, Oct 22,2021 12:42:23
[DHCP IP: (192.168.77.9)] to MAC address CE:25:AD:5D:D5:9D, Friday, Oct 22,2021 12:40:53
[DHCP IP: (192.168.77.2)] to MAC address AC:3C:8E:00:76:95, Friday, Oct 22,2021 12:18:41
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 12:15:38
[Internet connected] IP address: 98.41.205.35, Friday, Oct 22,2021 11:59:44
[Internet disconnected] Friday, Oct 22,2021 11:59:42
[DHCP IP: (192.168.77.14)] to MAC address 3E:C8:09:FA:E3:B8, Friday, Oct 22,2021 11:59:28
[Internet disconnected] Friday, Oct 22,2021 11:59:18
[DHCP IP: (192.168.77.5)] to MAC address F4:5C:89:B1:98:4B, Friday, Oct 22,2021 11:54:02
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:48:38
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:48:25
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:44:01
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:43:33
[DHCP IP: (192.168.77.5)] to MAC address F4:5C:89:B1:98:4B, Friday, Oct 22,2021 11:43:33
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:43:24
[DHCP IP: (192.168.77.3)] to MAC address AC:3C:8E:00:7A:E7, Friday, Oct 22,2021 11:43:23
[DHCP IP: (192.168.77.2)] to MAC address AC:3C:8E:00:76:95, Friday, Oct 22,2021 11:37:42
[DHCP IP: (192.168.77.3)] to MAC address AC:3C:8E:00:7A:E7, Friday, Oct 22,2021 11:32:57
[DHCP IP: (192.168.77.5)] to MAC address F4:5C:89:B1:98:4B, Friday, Oct 22,2021 11:26:46
[DHCP IP: (192.168.77.2)] to MAC address AC:3C:8E:00:76:95, Friday, Oct 22,2021 11:15:44
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:05:01
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:04:36
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:04:25
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:03:31
[DHCP IP: (192.168.77.5)] to MAC address F4:5C:89:B1:98:4B, Friday, Oct 22,2021 11:03:30
[DHCP IP: (192.168.77.17)] to MAC address 6C:CD:D6:E6:EB:8A, Friday, Oct 22,2021 11:03:24

Firmware Version for the modem is V4.6.3.6_2.0.48. I have updated the satellite firmware today to V4.6.3.16.

Event log screenshot is attached.

[FURRYe38]

Please post a copy and paste of the modems connection status page.
Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...

Please do not post MAC addresses in public forums. 

@vkdelta 

[sen4ik]

Connection Status page screenshot is attached.

There are no splitters. I am using good quality coax cable. I tried powering off and on.

How do I make sure ISP provisions the modem correctly?

[FURRYe38]

There should be a connections status page silimar to this:

Cable Connection
Cancel Apply
Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
837000000

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 837 MHz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked 256 QAM 31 837000000 Hz 0.1 dBmV 37.4 dB 0 0
2 Locked 256 QAM 1 651000000 Hz -1.6 dBmV 36.6 dB 0 0
3 Locked 256 QAM 2 657000000 Hz -1.6 dBmV 36.6 dB 0 0
4 Locked 256 QAM 3 663000000 Hz -1.3 dBmV 36.8 dB 0 0
5 Locked 256 QAM 4 669000000 Hz -1.3 dBmV 36.7 dB 0 0
6 Locked 256 QAM 5 675000000 Hz -1.1 dBmV 36.7 dB 0 0
7 Locked 256 QAM 6 681000000 Hz -0.8 dBmV 37.0 dB 0 0
8 Locked 256 QAM 8 693000000 Hz -0.5 dBmV 37.1 dB 0 0
9 Locked 256 QAM 9 699000000 Hz -0.2 dBmV 37.3 dB 0 0
10 Locked 256 QAM 10 705000000 Hz -0.2 dBmV 37.0 dB 0 0
11 Locked 256 QAM 11 711000000 Hz 0.0 dBmV 37.1 dB 0 0
12 Locked 256 QAM 12 717000000 Hz 0.4 dBmV 37.4 dB 0 0
13 Locked 256 QAM 13 723000000 Hz 0.3 dBmV 37.1 dB 0 0
14 Locked 256 QAM 14 729000000 Hz 0.6 dBmV 37.1 dB 0 0
15 Locked 256 QAM 15 735000000 Hz 0.9 dBmV 37.3 dB 0 0
16 Locked 256 QAM 16 741000000 Hz 1.0 dBmV 37.3 dB 0 0
17 Locked 256 QAM 17 753000000 Hz 1.1 dBmV 37.5 dB 0 0
18 Locked 256 QAM 18 759000000 Hz 1.0 dBmV 37.5 dB 0 0
19 Locked 256 QAM 19 765000000 Hz 0.7 dBmV 37.4 dB 0 0
20 Locked 256 QAM 20 771000000 Hz 0.8 dBmV 37.6 dB 0 0
21 Locked 256 QAM 21 777000000 Hz 0.7 dBmV 37.7 dB 0 0
22 Locked 256 QAM 22 783000000 Hz 0.6 dBmV 37.7 dB 0 0
23 Locked 256 QAM 23 789000000 Hz 0.7 dBmV 37.8 dB 0 0
24 Locked 256 QAM 24 795000000 Hz 0.5 dBmV 37.7 dB 0 0
25 Locked 256 QAM 25 801000000 Hz 0.4 dBmV 37.5 dB 0 0
26 Locked 256 QAM 26 807000000 Hz 0.5 dBmV 37.7 dB 0 0
27 Locked 256 QAM 27 813000000 Hz 0.5 dBmV 37.6 dB 0 0
28 Locked 256 QAM 28 819000000 Hz 0.1 dBmV 37.3 dB 0 0
29 Locked 256 QAM 29 825000000 Hz 0.4 dBmV 37.6 dB 0 0
30 Locked 256 QAM 30 831000000 Hz 0.2 dBmV 37.5 dB 0 0
31 Locked 256 QAM 32 843000000 Hz 0.0 dBmV 37.4 dB 0 0
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 5 5120 Ksym/sec 22000000 Hz 31.5 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 36000000 Hz 32.8 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 29000000 Hz 31.3 dBmV
4 Locked ATDMA 6 2560 Ksym/sec 16000000 Hz 33.3 dBmV
5 Not Locked Unknown 0 0 0 0.0 dBmV
6 Not Locked Unknown 0 0 0 0.0 dBmV
7 Not Locked Unknown 0 0 0 0.0 dBmV
8 Not Locked Unknown 0 0 0 0.0 dBmV

Downstream OFDM Channels
Channel Lock
Status Modulation /
Profile ID Channel
ID Frequency Power SNR /
MER Active Subcarrier
Number Range Unerrored
Codewords Correctable
Codewords Uncorrectable
Codewords
1 Locked 0 ,1 ,2 33 547000000 Hz -3.82 dBmV 36.6 dB 1108 ~ 2987 64457020 52608446 0
2 Not Locked 0 0 0 Hz 0 dBmV 0 dB 0 ~ 4095 0 0 0

Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV

Extended Upstream Transmit Power

Current System Time:Sat Oct 23 13:44:57 2021
System Up Time:02:07:41

[sen4ik]

Got it. Here you go.

Frequency Start Value

This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.

Starting Frequency

Startup Procedure

Procedure Status Comment Acquire Downstream Channel 471000000 Hz Locked Connectivity State Ok Operational Boot State Ok Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4)

Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectable 1 Locked QAM 256 1 405000000 Hz -2.5 dBmV 38.9 dB 6 0 2 Locked QAM 256 2 411000000 Hz -2.2 dBmV 38.6 dB 0 0 3 Locked QAM 256 3 417000000 Hz -2.5 dBmV 38.9 dB 0 0 4 Locked QAM 256 4 423000000 Hz -2.2 dBmV 38.9 dB 0 0 5 Locked QAM 256 5 429000000 Hz -2.4 dBmV 38.9 dB 0 0 6 Locked QAM 256 6 435000000 Hz -2.0 dBmV 38.9 dB 0 0 7 Locked QAM 256 7 441000000 Hz -1.7 dBmV 40.3 dB 0 0 8 Locked QAM 256 8 447000000 Hz -1.9 dBmV 40.3 dB 0 0 9 Locked QAM 256 9 453000000 Hz -2.0 dBmV 40.3 dB 0 0 10 Locked QAM 256 10 459000000 Hz -2.0 dBmV 38.9 dB 0 0 11 Locked QAM 256 11 465000000 Hz -2.0 dBmV 40.9 dB 0 0 12 Locked QAM 256 12 471000000 Hz -2.0 dBmV 40.3 dB 5 0 13 Locked QAM 256 13 477000000 Hz -2.0 dBmV 38.9 dB 1 0 14 Locked QAM 256 14 483000000 Hz -1.9 dBmV 38.9 dB 0 0 15 Locked QAM 256 15 489000000 Hz -1.9 dBmV 38.9 dB 0 0 16 Locked QAM 256 16 495000000 Hz -1.9 dBmV 38.9 dB 0 0 17 Locked QAM 256 17 507000000 Hz -2.0 dBmV 38.9 dB 0 0 18 Locked QAM 256 18 513000000 Hz -2.2 dBmV 38.9 dB 0 0 19 Locked QAM 256 19 519000000 Hz -2.5 dBmV 38.9 dB 0 0 20 Locked QAM 256 20 525000000 Hz -2.5 dBmV 38.9 dB 0 0 21 Locked QAM 256 21 531000000 Hz -2.7 dBmV 38.9 dB 0 0 22 Locked QAM 256 22 537000000 Hz -2.9 dBmV 38.9 dB 0 0 23 Locked QAM 256 23 543000000 Hz -2.9 dBmV 38.9 dB 0 0 24 Locked QAM 256 24 549000000 Hz -3.0 dBmV 38.9 dB 0 0 25 Locked QAM 256 25 555000000 Hz -3.0 dBmV 38.9 dB 0 0 26 Locked QAM 256 26 561000000 Hz -3.0 dBmV 38.9 dB 0 0 27 Locked QAM 256 27 567000000 Hz -3.5 dBmV 38.9 dB 0 0 28 Locked QAM 256 28 573000000 Hz -3.5 dBmV 38.6 dB 0 0 29 Locked QAM 256 29 579000000 Hz -3.7 dBmV 38.9 dB 0 0 30 Locked QAM 256 30 585000000 Hz -3.7 dBmV 38.6 dB 0 0 31 Locked QAM 256 31 591000000 Hz -3.5 dBmV 38.9 dB 0 0 32 Locked QAM 256 32 597000000 Hz -3.9 dBmV 38.9 dB 0 0

Upstream Bonded Channels

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 5120 Ksym/sec 16400000 Hz 46.5 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 22800000 Hz 46.3 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 29200000 Hz 46.8 dBmV 4 Locked ATDMA 4 5120 Ksym/sec 35600000 Hz 47.3 dBmV 5 Locked ATDMA 5 1280 Ksym/sec 39600000 Hz 43.8 dBmV 6 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV

Downstream OFDM Channels

Channel Lock Status Modulation/Profile ID Channel ID Frequency Power SNR/MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked 1 193 850000000 Hz -6.0 dBmV 39.9 dB 1108~2987 0 0 0 2 Not Locked 0 0 0 Hz 0.0 dBmV 0.0 dB 0~4095 0 0 0

Upstream OFDMA Channels

Channel Lock Status Modulation/Profile ID Channel ID Frequency Power 1 Not Locked 0 0 0 Hz 0.0 dBmV 2 Not Locked 0 0 0 Hz 0.0 dBmV

Current System Time: Sat Oct 23 12:52:23 2021

System Up Time 1 days 02:01:52

[FURRYe38]

Great. 

Do you have a snippet of the Events Log page as well? 

[sen4ik]

Time Priority Description Oct 21 2021 13:12:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 13:12:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 13:12:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 13:12:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 13:12:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 13:12:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 13:12:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 13:12:30 Notice (6) TLV-11 - unrecognized OID Oct 21 2021 13:12:30 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11 Oct 21 2021 13:12:32 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Oct 21 2021 13:12:49 Alert (2) CM Certificate Error Oct 21 2021 16:21:53 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 16:21:54 Notice (6) TLV-11 - unrecognized OID Oct 21 2021 16:21:54 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11 Oct 21 2021 16:21:57 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Oct 21 2021 16:22:14 Alert (2) CM Certificate Error Oct 21 2021 19:55:41 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 21 2021 19:55:42 Notice (6) TLV-11 - unrecognized OID Oct 21 2021 19:55:42 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11 Oct 21 2021 19:55:45 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Oct 21 2021 19:56:03 Alert (2) CM Certificate Error Oct 21 2021 21:17:03 Critical (3) No Ranging Response received - T3 time-out Oct 22 2021 09:05:12 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 22 2021 09:05:13 Notice (6) TLV-11 - unrecognized OID Oct 22 2021 09:05:13 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11 Oct 22 2021 09:05:16 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Oct 22 2021 09:05:28 Alert (2) CM Certificate Error Oct 22 2021 10:51:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 22 2021 10:51:31 Notice (6) TLV-11 - unrecognized OID Oct 22 2021 10:51:31 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11 Oct 22 2021 10:51:34 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Oct 22 2021 10:51:51 Alert (2) CM Certificate Error Oct 22 2021 12:15:16 Critical (3) No Ranging Response received - T3 time-out Oct 22 2021 14:39:51 Alert (2) CM Certificate Error Oct 22 2021 15:12:17 Critical (3) No Ranging Response received - T3 time-out Oct 23 2021 12:57:46 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 23 2021 12:57:47 Notice (6) TLV-11 - unrecognized OID Oct 23 2021 12:57:47 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11 Oct 23 2021 12:57:50 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Oct 23 2021 12:58:07 Alert (2) CM Certificate Error Oct 23 2021 13:04:30 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Oct 23 2021 13:04:31 Notice (6) TLV-11 - unrecognized OID Oct 23 2021 13:04:31 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11 Oct 23 2021 13:04:34 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Oct 23 2021 13:04:51 Alert (2) CM Certificate Error Oct 23 2021 17:24:41 Critical (3) No Ranging Response received - T3 time-out

[FURRYe38]

One item you need to ask your ISP about:

These shouldn't be seen in the logs I believe. Maybe why the CBR can't get a seamless connection and can't get a IP address seamlessly from the ISP. The ISP needs to ensure the CBR is getting the config file correctly. Have them check the events log on the CBR as well. 

Critical (3)

Config File Rejected due to Invalid or Unexpected TLV 11"

[Triggs21]

Any fix on this yet... my system is doing the same thing.

[sen4ik]

My system just randomly started working. I assume something was up on the Xfinity side. Sorry I don't have any details, I honestly have no idea why it started working.

[Triggs21]

Can you be alittle more specific. I have xfinity as well. What issues were you having. And what did you change, and when was the last signal drop you had...

[FURRYe38]

I would presume the ISP had done someting on there side. Most of the time this is a ISP signal issue. If the signals and configuration are not done well or with in specs on the ISP side, makes it hard for ANY modem to work right. 

---

@sen4ik wrote:

My system just randomly started working. I assume something was up on the Xfinity side. Sorry I don't have any details, I honestly have no idea why it started working.

---

[Triggs21]

Thats interesting. Im having the same issue i did before my rma. This model still will not stay connected to xfinity without dropping connectivity. Is there anything I can do to verify isp signal problem? Xfinity has been here several times verifying the signal. Interestingly enough once I connect my older cbr (docsis 3.0) it works fine no disconnects no issues... help

[FURRYe38]

Please post a copy and paste of the modems Connection Status page and Event Log page.

---

@Triggs21 wrote:
Thats interesting. Im having the same issue i did before my rma. This model still will not stay connected to xfinity without dropping connectivity. Is there anything I can do to verify isp signal problem? Xfinity has been here several times verifying the signal. Interestingly enough once I connect my older cbr (docsis 3.0) it works fine no disconnects no issues... help

---

[sen4ik]

@Triggs21 The issue is described in the initial post. I had an issue for about a week, and than it self healed. I didn't do anything to fix it.

[Triggs21]

Startup Procedure

Procedure Status Comment Acquire Downstream Channel 519000000 Hz Locked Connectivity State Ok Operational Boot State Ok Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4)

Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectable 1 Locked QAM 256 10 495000000 Hz 13.1 dBmV 40.3 dB 0 0 2 Locked QAM 256 11 507000000 Hz 13.0 dBmV 40.3 dB 6 0 3 Locked QAM 256 12 513000000 Hz 13.1 dBmV 40.3 dB 0 0 4 Locked QAM 256 13 519000000 Hz 13.1 dBmV 40.9 dB 0 0 5 Locked QAM 256 14 525000000 Hz 13.0 dBmV 40.3 dB 0 0 6 Locked QAM 256 15 531000000 Hz 13.0 dBmV 40.3 dB 0 0 7 Locked QAM 256 16 537000000 Hz 13.0 dBmV 40.3 dB 0 0 8 Locked QAM 256 17 543000000 Hz 12.8 dBmV 40.3 dB 0 0 9 Locked QAM 256 18 549000000 Hz 12.6 dBmV 40.3 dB 0 0 10 Locked QAM 256 19 561000000 Hz 12.8 dBmV 40.3 dB 0 0 11 Locked QAM 256 20 567000000 Hz 12.6 dBmV 40.3 dB 0 0 12 Locked QAM 256 21 573000000 Hz 12.5 dBmV 40.3 dB 0 0 13 Locked QAM 256 22 579000000 Hz 12.5 dBmV 40.3 dB 0 0 14 Locked QAM 256 23 585000000 Hz 12.5 dBmV 38.9 dB 0 0 15 Locked QAM 256 24 591000000 Hz 12.1 dBmV 40.3 dB 0 0 16 Locked QAM 256 25 597000000 Hz 12.0 dBmV 40.3 dB 0 0 17 Locked QAM 256 26 603000000 Hz 12.5 dBmV 38.9 dB 2 0 18 Locked QAM 256 27 609000000 Hz 12.3 dBmV 38.9 dB 1 0 19 Locked QAM 256 28 615000000 Hz 12.4 dBmV 38.9 dB 0 0 20 Locked QAM 256 29 621000000 Hz 12.3 dBmV 38.9 dB 3 0 21 Locked QAM 256 30 627000000 Hz 12.4 dBmV 38.9 dB 17 0 22 Locked QAM 256 31 633000000 Hz 12.1 dBmV 38.6 dB 5 0 23 Locked QAM 256 32 639000000 Hz 12.0 dBmV 38.9 dB 0 0 24 Locked QAM 256 34 645000000 Hz 12.0 dBmV 38.9 dB 0 0 25 Locked QAM 256 35 651000000 Hz 11.8 dBmV 38.9 dB 0 0 26 Locked QAM 256 36 657000000 Hz 11.5 dBmV 38.9 dB 0 0 27 Locked QAM 256 37 663000000 Hz 11.0 dBmV 38.6 dB 0 0 28 Locked QAM 256 38 669000000 Hz 10.9 dBmV 38.9 dB 0 0 29 Locked QAM 256 39 675000000 Hz 11.0 dBmV 38.6 dB 0 0 30 Locked QAM 256 40 681000000 Hz 10.8 dBmV 38.9 dB 0 0 31 Locked QAM 256 41 687000000 Hz 10.3 dBmV 38.6 dB 0 0 32 Not Locked N/A N/A 0 Hz 0.0 dBmV 0.0 dB 0 0

Upstream Bonded Channels

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 44 5120 Ksym/sec 17300000 Hz 39.0 dBmV 2 Locked ATDMA 43 5120 Ksym/sec 23700000 Hz 38.8 dBmV 3 Locked ATDMA 42 5120 Ksym/sec 30100000 Hz 39.3 dBmV 4 Locked ATDMA 41 5120 Ksym/sec 36500000 Hz 40.5 dBmV 5 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 6 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV

Downstream OFDM Channels

Channel Lock Status Modulation/Profile ID Channel ID Frequency Power SNR/MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked 3 33 693000000 Hz 10.3 dBmV 39.2 dB 1108~2987 0 0 0 2 Not Locked 0 0 0 Hz 0.0 dBmV 0.0 dB 0~4095 0 0 0

Upstream OFDMA Channels

Channel Lock Status Modulation/Profile ID Channel ID Frequency Power 1 Not Locked 0 0 0 Hz 0.0 dBmV 2 Not Locked 0 0 0 Hz 0.0 dBmV

Current System Time: Sun Oct 31 16:08:44 2021

System Up Time 00:25:22

[Triggs21]

Time	Priority	Description
Oct 31 2021 15:31:34	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:31:34	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:31:34	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:31:34	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:31:34	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:31:44	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:31:45	Notice (6)	CM-STATUS message sent. Event Type Code: 5
Oct 31 2021 15:31:53	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:31:53	Notice (6)	CM-STATUS message sent. Event Type Code: 5
Oct 31 2021 15:31:53	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:31:53	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:31:54	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:31:55	Notice (6)	CM-STATUS message sent. Event Type Code: 5
Oct 31 2021 15:32:04	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:32:05	Notice (6)	CM-STATUS message sent. Event Type Code: 5
Oct 31 2021 15:32:19	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:32:21	Notice (6)	CM-STATUS message sent. Event Type Code: 5
Oct 31 2021 15:32:24	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:32:25	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:32:26	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:32:26	Notice (6)	CM-STATUS message sent. Event Type Code: 5
Oct 31 2021 15:32:31	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:32:43	Notice (6)	CM-STATUS message sent. Event Type Code: 5
Oct 31 2021 15:32:44	Warning (5)	Lost MDD Timeout
Oct 31 2021 15:32:44	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:32:44	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:32:50	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:32:50	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:32:50	Notice (6)	CM-STATUS message sent. Event Type Code: 2
Oct 31 2021 15:32:53	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:32:59	Notice (6)	CM-STATUS message sent. Event Type Code: 4
Oct 31 2021 15:33:02	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Oct 31 2021 15:33:02	Warning (5)	Lost MDD Timeout
Oct 31 2021 15:33:04	Notice (6)	CM-STATUS message sent. Event Type Code: 4
Oct 31 2021 15:33:37	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out
Oct 31 2021 15:34:01	Notice (6)	CM-STATUS message sent. Event Type Code: 6
Oct 31 2021 15:34:04	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out
Oct 31 2021 15:34:15	Notice (6)	CM-STATUS message sent. Event Type Code: 6
Oct 31 2021 15:34:28	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out
Oct 31 2021 15:34:51	Notice (6)	CM-STATUS message sent. Event Type Code: 6
Oct 31 2021 15:44:21	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Oct 31 2021 15:44:21	Notice (6)	TLV-11 - unrecognized OID
Oct 31 2021 15:44:21	Critical (3)	Config File Rejected due to Invalid or Unexpected TLV 11
Oct 31 2021 15:44:36	Alert (2)	CM Certificate Error

[Triggs21]

Be aware the event log may show inconsistancys due to me unplugging the router and switching coax from the splitter now directly plugged in (no splitter) to see if that makes a difference with dropping internet service

[FURRYe38]

Ok, Please post a Event log after a while of the CBR being online with out any wire changes. 

The Power on the status page maybe too high.

Mines at 0.1dbm range or -1.#Dbm on a few channels on my cable modem.

You might ask the ISP to maybe turn down the power to the modem some. 

@vkdelta 

[sen4ik]

And I am back to manually releasing/renewing IP again. Same things as was described in the initial post.

Horrible experience. Especially knowing that the modem I bought is very expensive.

[Triggs21]

Ive tried almost everything I can think of..

Plus i am a IT technician so if I cant figure it out im just left to assume we all purchased a **bleep** model orbi. This is my Rma that came shipped with a totally different firmware and im still having the same connection issues that everyone else describes, amazon is flooded with negative reviews on this model orbi as well.

My older Rbk docsis 3.0 orbi works completely fine with no issues on the same coax line.

Technically I shouldn't have to do or change any settings to get this new one to work stable, it should work as advertised just like it did when i first bought it 6 months or so ago.

We dont expect something to just stop working reliably after afew months of usage, especially from a company ive never had an issue with.

Is this new firmware gonna save my 600 dollar paperweight??

Sorry for the rant just so hard to believe there is no saving this extremely expensive setup!!

[FURRYe38]

Have you updated to v8 yet? 

https://community.netgear.com/t5/Orbi-with-Built-in-Cable-Modem/New-CBR750-Firmware-Version-4-6-5-8-...

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@sen4ik wrote:

And I am back to manually releasing/renewing IP again. Same things as was described in the initial post.

Horrible experience. Especially knowing that the modem I bought is very expensive.

---

[Triggs21]

No it kept dropping internet so I had to switch back to my old rbr since my wife works from home... ill have to wait until the weekend to reconnect it and update.

[sen4ik]

I have updated to the new V4.6.5.8 firmware, and it still drops every 1.5 hours. I am opening a ticket with Netgear to see if maybe they can help.

[sen4ik]

Called Netgear support.

They told me to change the MTU size to 1486, but they couldn't explain why I should do it.

They told me to update CTS/RTS Threshold to 2347.

And they told me to update wireless channels to the highest number for each channel.

They told me this will fix my issue, which it will not. The issue lays somewhere else other than just tweaking the above.

I will wait another hour for the internet to drop, and will call support again hoping they will take me to the Tier 2 support.