GoCoax MoCA 2.5 ip addresses and docsis 3.1

[njhorn]

I have a pair of 2.5 adapters from GoCoax that have worked great over the past year. But I want to change the IP address to be able to keep an eye on the connections. Do I just connect them one by one to my laptop directly, set a manual ip on laptop ethernet to something like 192.168.254.100, and then connect to 192.168.254.254 and change the IP address on the moca adapter to something like 192.168.50.221 and 192.168.50.222 (my 192.168.50.0/24 DHCP server on my ax88u I have stopping at .220 to leave room for manual addresses)?

Also, is it worth upgrading the firmware? I have Spectrum gigabit (940/35) over docsis 3.1 being installed Thursday as an upgrade from 3.0 400/20... Will the firmware upgrade help at all with possible overlap in frequencies with docsis 3.1?

Here are the current frequencies used on 3.0 modem with spectrum... (also screenshot attached)... This is over about a week of uptime I think, pretty clean signals... thanks!

Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 25 603000000 Hz -6.2 dBmV 39.1 dB 18 0 2 Locked QAM256 30 633000000 Hz -6.9 dBmV 38.4 dB 7 0 3 Locked QAM256 10 513000000 Hz -4.0 dBmV 40.7 dB 0 0 4 Locked QAM256 11 519000000 Hz -4.4 dBmV 40.2 dB 2 0 5 Locked QAM256 12 525000000 Hz -4.6 dBmV 40.2 dB 0 0 6 Locked QAM256 5 483000000 Hz -4.7 dBmV 40.5 dB 1 0 7 Locked QAM256 14 537000000 Hz -3.9 dBmV 40.8 dB 1 0 8 Locked QAM256 15 543000000 Hz -4.0 dBmV 40.6 dB 0 0 9 Locked QAM256 16 549000000 Hz -4.4 dBmV 40.2 dB 1 0 10 Locked QAM256 3 471000000 Hz -4.6 dBmV 40.6 dB 1 0 11 Locked QAM256 18 561000000 Hz -4.9 dBmV 40.0 dB 2 0 12 Locked QAM256 9 507000000 Hz -3.8 dBmV 36.8 dB 3 0 13 Locked QAM256 20 573000000 Hz -5.3 dBmV 39.8 dB 4 0 14 Locked QAM256 21 579000000 Hz -5.6 dBmV 39.6 dB 17 0 15 Locked QAM256 22 585000000 Hz -5.5 dBmV 39.2 dB 12 0 16 Locked QAM256 23 591000000 Hz -5.5 dBmV 38.8 dB 13 0 17 Locked QAM256 24 597000000 Hz -6.0 dBmV 39.8 dB 0 0 18 Locked QAM256 19 567000000 Hz -5.6 dBmV 40.8 dB 0 0 19 Locked QAM256 26 609000000 Hz -6.8 dBmV 39.4 dB 0 0 20 Locked QAM256 27 615000000 Hz -6.6 dBmV 39.4 dB 0 0 21 Locked QAM256 28 621000000 Hz -7.3 dBmV 38.9 dB 0 0 22 Locked QAM256 29 627000000 Hz -7.4 dBmV 38.6 dB 0 0 23 Locked QAM256 2 465000000 Hz -4.7 dBmV 41.9 dB 0 0 24 Locked QAM256 31 639000000 Hz -7.8 dBmV 38.2 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 17800000 Hz 49.8 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 24200000 Hz 50.8 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 30600000 Hz 51.0 dBmV 4 Locked ATDMA 4 5120 Ksym/sec 37000000 Hz 51.0 dBmV 5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

 

[njhorn]

@gocoax if y'all are still around on here would love to hear from the source . thanks!

 

[krkaufman]

it looks like I’m using 1150 and up on the moca adapters, and getting around 3600 speed on them per the UI. What can I do to be prepared for the 3.1 gigabit upgrade if spectrum uses high bands.

A crash course in meditation?

I have an extra POE adapter, would putting one on the end of the coax going into the 3.1 modem work?

Some DOCSIS 3.1 modems have been seen to be unstable if a MoCA network is operating at a frequency within the DOCSIS 3.1 range for which the modem is spec'd, so installing a MoCA filter on such a modem's coax input has been helpful as a prophylactic in protecting such a device from the MoCA signals. That said, being able to use a MoCA filter in this way depends upon what DOCSIS 3.1 frequencies are in use by your provider; if the provider is employing frequencies within the MoCA filter's stop band, then another solution would be needed.

Of course, if your provider is using these higher DOCSIS 3.1 frequencies, the main "PoE" MoCA filter (the MoCA filter at your cable signal point-of-entry) would be similarly problematic. In fact, to accurately assess what DOCSIS 3.1 frequencies are used by your provider, you'd need to ensure that the path from your provider to your modem/gateway is free of any MoCA filters; they could be replaced if/when you determine the frequencies in use. (Keeping in mind that operating a MoCA network w/o a "PoE" MoCA filter is a security risk.)

Or maybe only using higher bands for moca? Even if that drops the moca speed to 2000 or so from 3600, it’s still more than the gigabit lan stuff it’s plugged into right?

Aside from a separate, dedicated coax line for the modem/gateway, this is the typical backup if the provider is using DOCSIS 3.1 frequencies above 1002 MHz. The initial rollouts of DOCSIS 3.1 are supposed to leave room for MoCA, provided the MoCA gear allows for customizing the frequency range in use.

It would seem @gocoax is aware of the need based on this reply on the subject of MoCA 2.5 and DOCSIS 3.1:

DOCSIS 3.1 have the frequency range up to 1218MHz, MoCA frequency range is 1125-1675MHz. There is some overlap between them. If you really want to use DOCSIS3.1 and MoCA together. Maybe the following suggestions are useful:
1, Connect MoCA adapter and Cable modem to RF splitter directly.
2, Use a special MoCA adapter with special band filter, the lowest frequency is higher than 1218MHz. configure MoCA adapter to use 1350-1675MHz.
3, Or use special external band pass filter for the cables connected to MoCA adapters. the higher frequency is up to 1218MHz. configure MoCA adapter to use 1350-1675MHz.
We really wants to test Step 3, but we only have DOCSIS3.0 cable service.

One issue I haven't seen addressed is what a user is supposed to do about MoCA security at the point-of-entry if DOCSIS 3.1 signals above 1002 MHz are in use -- and so the typical "PoE" MoCA filter couldn't be used. (I haven't seen a MoCA filter with stop-band starting at 1300 MHz.) This points back to the preferred solution of a separate, dedicated coax line for a DOCSIS 3.1 modem/gateway, allowing MoCA to operate as before over the original home coax plant.

 

[njhorn]

Thanks @krkaufman I remember you helping me on the tivo forums years ago with this stuff

I tried setting my gocoax to d-high only last night with an LOF of 1400... Sure enough it works, I get 3 channels and 2000Mbit instead of 5 and 3500Mbit, but I only have an xbox and Apple TV at the other end of this, so that is plenty if I need to go that way...

Also, did a speedtest this morning before Spectrum comes, and find they've already upgraded my service... I'm still on docsis 3.0, but now consistently getting 700-710/38-40...

But more importantly I think, the channels being used are still fairly low in the 500-600 bandwidth range... Feeling less nervous about this now