Moca was working - now it’s not

Discussion in 'TiVo Help Center' started by Voting, Jun 3, 2018.

  1. Voting

    Voting New Member

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    I swapped the feeds between the bad mini and the good mini. The formerly good mini no longer works. The formerly bad mini is now working intermittently - it won't stay connected 100%. I will be replacing the splitter as it seems this is the most likely culprit. I just don't get how a splitter can "die".

    If this doesn't work, I'll trace the line and look for other problems.

    I hate to wait for one to show up in the mail. The current splitter is a Gensys II. The available stores for me are Fry's (which has ANTOP and RCA), Home Depot (Ideal), Lowes (Ideal, Legrand), Walmart (ONN) and Best Buy (Rocketfish). Would one of these be OK? Or order something from Amazon?
     
  2. krkaufman

    krkaufman TDL shepherd

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    Amazon search. Just confirm GHS-PRO-M series.
     
  3. Voting

    Voting New Member

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    OK, OK. I ordered Holland GHS-4PRO-M.

    I will let you know in 2 days if that solved the problem.
     
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  4. fcfc2

    fcfc2 Well-Known Member

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    I hope the splitter gets you up and working again, but, it is also possible that the MoCA adapter is just getting old and a bit weaker, too. This is hard to troubleshoot without having another adapter handy.
    Regarding splitters going bad...first any splitter exposed to the outside weather can corrode over time, so can those inside for that matter but less likely. The coax connections can also corrode, take a good hard look at the copper center conductor. Is is nice and bright and shiny like a new penny, if not, try this old trick, grap a standard pencil with eraser and slowly start spinning the pencil eraser down over the copper conductor until it looks new again and then reconnect. This has revived many problem connections for me.
     
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  5. Voting

    Voting New Member

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    I installed the new splitter and the one TIVO is still not connecting. I also did a full cycle reset and no change.

    So as I see it, remaining possibilities include:
    1) problem somewhere along the coax run - I will be checking this next
    2) problem with the MoCA adapter.

    Any other ideas?

    I double checked the center conductors and all were shiny.
     
  6. kpeters59

    kpeters59 Well-Known Member

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    If I was working on it, I'd have already replaced the ends on the wires. Starting with the outside ones...

    -KP
     
  7. Voting

    Voting New Member

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    Jun 3, 2018
    Here's what I've done:
    • Followed the coax line from origin to end through the attic. It is a direct line with no additional splitters.
    • I replaced both ends.
    • I removed the wall plate and connected the line directly to the TiVo Mini.
    None of these have made a difference - the bedroom Mini does not connect. Yes, I did a full cycle power reset across the network.

    But there is one odd thing. I switched the ports on the splitter between the two Minis as a test. And just like with the old splitter, neither Mini would work. But if I swapped the ports, the one Mini will work while the bedroom will not. I can't think of a single reason on a known good splitter why this would happen.

    The one item I haven't done is replaced the MoCA adapter. But I am suspecting that won't make a difference either. It really seems like something else is going on here. Could it be a gremlin? Thoughts?
     
  8. UCLABB

    UCLABB Well-Known Member

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    Have you bypassed the coax altogether with a new cable? Maybe move the mini close to the splitter so you don't need a long cable.
     
  9. tapokata

    tapokata Active Member

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    It's possible that there's an address conflict at the router. One option to try is to reserve IP addresses in your router for the MAC address of each MoCA device (that is, associate the IP address with the MAC for each of the Mini's and the Ethernet/Coax Bridge adapter). Select addresses that are just outside of the DHCP range managed by the router (if the DHCP range ends at xxx.xx.xx.200, start with 201, etc). With the configuration changes made, power down your router and all of the MoCA devices. Restart in the following order:

    1.) Router
    2.) ECB adapter
    3.) Roamio
    4.) Minis (with the suspect Mini last)

    As you bring each MoCA device up, verify that the new network address has been assigned. When you check the network stats at any Mini, you should see the PHY link rates by MAC address for each peer, which will tell you which device isn't communicating. If the problem persists, try swapping the Minis to see if the problem follows.

    As you've replaced the 1x4 splitter with a proper rated splitter, a bad drop lead to one location would have been clearly shown when you transposed the drops at the output ports- but the fact that the suspect lead was still dead, but the other device was inconsistent leads me to guess that it's a DHCP issue.
     
  10. kpeters59

    kpeters59 Well-Known Member

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    Verify your MoCA levels.
    If one won't connect, swap the cables again to get a baseline.
    Replace splitter with a MoCA compatible 'Powered Splitter'.
    Profit?

    What fittings did you use to replace the ends of the coax?

    -KP
     
  11. Voting

    Voting New Member

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    Jun 3, 2018
    All - I do not believe this is a cabling issue. There is no evidence it is, I've never had a problem with the cabling before, and nothing has changed on the cabling until I started trouble shooting this problem. Let's assume that there is another problem as I believe it is more likely.

    As mentioned previously, the mini is showing on the MoCA network as a node (I show 3 nodes). But it is unable to get an IP address which makes it show "offline". When I look at network status, I get:

    Coordinator MAC Address (working Mini)
    TX Power: -27
    Peer Node MAC Address (same working Mini)
    TX PHY Rate: 278559738
    RX PHY Rate: 273672806
    TX Power Estimate: -27
    RX power estimate: -47.04
    Peer Node MAC Address (I assume this is the address for the MoCA adapter?)
    TX PHY Rate: 242147435
    RX PHY Rate: 0
    TX Power Estimate: -27
    RX power estimate: -71.04

    So why would the MoCA adapter have a 0 for the RX PHY Rate?
    If it shows 3 nodes, why doesn't it list the problem Mini as a "Peer Node"?
    What I did was assign the problem mini an static IP address on my router. Mini still didn't grab that IP. I then setup the same static IP on the mini. Still no connect. Wouldn't that approach accomplish the same as what you are describing as assigning a router driven IP address would prevent a conflict?

    One other idea - are there known devices on a network that could cause an issue with a TIVO? Alexa, Hue Bridge, etc?

    Thanks.
     
  12. tapokata

    tapokata Active Member

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    The MAC Id for the device is the first line in the "Network Status" device screen- that is the Coax MAC address for that device, so there should be no confusion. The peer nodes are for the other devices on the network, such as the ECB adapter and the other Mini. If the Mini doesn't have an IP address, it's noted as off-line.

    Disconnect the faulty mini. Power down working Mini and the ECB adapter. Power up the ECB first, and then the working Mini, and check the stats. You should have two nodes- with the ECB as the controlling device, and the working Mini. If you see an additional node, then there's another MoCA client on your plant

    If that all works, move the working Mini to the location of the faulty mini. If it powers up and accepts a network address, then the conflict is with the faulty mini. If it does not accept an address, than the problem is in the coax plant, or with the ECB adapter.

    If the Mini is faulty, check the MoCA settings to verify that you are using the MoCA channel setting as the other devices; that's a potential mismatch.
     
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  13. Voting

    Voting New Member

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    I did this. I show the 2 expected nodes with just ECB and working mini are only two up. (Just for fun I powered up the other mini. Network goes to 3 nodes. Here's what's interesting - on working mini it shows data movement (thru data rate) to both the non-working mini and the ECB. On the non-working mini it shows connection to the working mini but not to the ECB.)

    The working mini at the location of the non-working mini does not connect via MoCA nor will it accept an IP address. So it actually does less than the non-working mini. (the non-working mini works fine when plugged in at the other location).

    So its the plant or the ECB. I feel like this group has pretty much exhausted all possibilities on the plant. So the likely culprit is the ECB I suppose. I don't know if it matters, but the bedroom is the longest run.

    Opinions?

    P.S. The MoCA channel is the same on both Mini (and encryption is off). I assume there is no way to change this on the ECB.

     
  14. tapokata

    tapokata Active Member

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    If you are able to establish link (PHY) rates for both Tx and Rx between both minis on the plant, the problem is not with the coax plant (MoCa is a peer to peer network, with multiple link rates dependent upon the clients). The transmit power numbers you posted (-27 dBm) are as good as it gets, so the system isn’t working too hard to overcome any issue. One last test to rule out the plant... as a test, install another splitter on the drop feeding the good mini location, and install both minis on that splitter. You can move the hdmi cable back and forth to see data numbers. If both minis work ( and get a unique ip address from the router) in that configuration, there is a short in the cable in the drop to the bad mini location.

    Otherwise, it looks like the ECB is the issue.
     
  15. tapokata

    tapokata Active Member

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    If the cable is continuous, I wouldn’t worry about longest run. I have a three peer MoCA network where the longest combined drop totals 110’ and my transmit power is at -27 dBm throughout. On the other hand, if the drop has a barrel connector or two, that could cause trouble. If the drop is bad, start replacing and re-crimping new connectors at both ends.

    A Klein coax tester or equivlaent is helpful in ringing out continuity issues
     
    Last edited: Jun 10, 2018
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  16. Voting

    Voting New Member

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    Jun 3, 2018
    I got an unexpected result. I added a splitter to the good mini drop location and attached the working mini. It would not connect to the network. Tried different two different splitters, different cables, etc. Nothing would get it to connect. I remove the splitter - it connects. Wth?
     
  17. kpeters59

    kpeters59 Well-Known Member

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    The ECB probably has a configuration page. Check your router for its IP address. It's default login is probably admin / admin.

    Maybe perform a full reset on it?

    -KP
     
  18. krkaufman

    krkaufman TDL shepherd

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    For just $16, a different MoCA adapter is worth a try. (alternatives)

    (Note that the WCB3000N lacks a RF pass-through port.)
     
  19. tapokata

    tapokata Active Member

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    I think it's the ECB.

    I'd be cautious about that $16 WCB3000N- the 1 star comments on Amazon speculate that these are "refurbished" ECB's that were Time-Warner specific-I think this would be a case that you get what you pay for.

    While it's a 2.0 bonded ECB (ie, more than you need for MoCA 1.1 minis), the $60 Motorola https://www.amazon.com/Motorola-Ada...2&sr=8-1-spons&keywords=motorola+mm1000&psc=1 would be a reasonable solution
     
  20. krkaufman

    krkaufman TDL shepherd

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    I'm skeptical that there's anything special in the device's firmware that would only allow it to work in conjunction with a Time-Warner setup. Regardless, if it doesn't work as advertised, returns are free. Worth the "gamble" in my view, especially where only MoCA 1.1 nodes are present.

    Whichever route, trying a different MoCA adapter certainly seems prudent.
     

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