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Shibby RT-N66U Loses Internet Weekly

Discussion in 'Tomato Firmware' started by veinypea, Dec 10, 2013.

  1. veinypea

    veinypea Reformed Router Member

    I have a RT-N66U with Shibby's Firmware 1.28.0000 MIPSR2-112 K26 USB AIO-64K. I previously had a Shibby K26RT-N build 112 and had this same issue. My guess is that it is not build specific.

    My setup is cable modem--->VOIP(Ooma)---->router. About once a week the internet connection drops even though the modem has a connection. My modem always says I have a connection. To get the connection back all I have to do is reboot the router and I good for about another week. For whatever reason the first couple months I flashed build 112 I never had an issue. Then weekly for the last 3 months it happens.

    I have no idea how to troubleshoot this or how to fix it. Can anyone help me out?

    John
     
  2. JoeDirte

    JoeDirte Serious Server Member

    I'm running Shibby 115 on an RT-N66U bridged to my ADSL modem, but have run various other Shibby versions previously and have not experienced this issue. Sounds like it's specific to your setup - perhaps related to your cable modem. I occasionally get a new WAN IP automatically, but I don't even notice unless I check the GUI overview page. Are you running bridged or just grabbing a DHCP address from the cable modem? You might try a manual WAN config on the RT-N66U if you're not bridged and see if that helps.
     
    Last edited: Dec 10, 2013
  3. veinypea

    veinypea Reformed Router Member

    I have not special setup. I believe I am just grabbing a DHCP address from the cable modem. If I understand correctly the IP address might be changing from my modem and the router does not change with it?
     
  4. JoeDirte

    JoeDirte Serious Server Member

    Next time you lose the connection, I would try to ping the modem from the router using the tools menu - to test the modem <-> router connectivity - presuming you can still connect to the router from another machine. Also, check the logs on the router.
     
  5. leandroong

    leandroong Addicted to LI Member

    My connection is ADSL modem too. Modem setup is bridge to primary router. With bridge or not, I get internet disconnection if idle for 15 mins or less. This has been the cause of ISP killing my internet connection, maybe due to shortage available public IPv4s. What I did to circumvent this, I get another tomato router. wirelessly connected (WET), to play internet radio all the time. This works for me.

    In your case, get USB audio and let it play internet radios, so your internet connection is never disconnected.
     
  6. Elfew

    Elfew Addicted to LI Member

    Maybe set autoreconnect or autoreboot in scheduler every 6 days
     
  7. koitsu

    koitsu Network Guru Member

    Please provide signal stats from your cable modem. "I have a connection" means nothing -- it's very likely your cable connection is on the edge of being bad/barely hanging on to dear life, and if you can get its signal stats I can decode them for you and tell you what's going on. You need someone who can properly understand the values to give you a proper analysis; anyone unfamiliar with the values won't know what they're looking at.

    For example I had a friend in the UP of Michigan who would have a stable connection up until ~4pm every day, then it would start dropping out but work fine for hours at a time sometimes. The issue turned out to be 5 or 6 degraded cables between him and the cable plant which required 4 or 5 cable guys to fix.

    I am not going to debug leandroong's issue at this time, but the same issue applies there: get signal stats from your DSL modem and provide them here.
     
  8. veinypea

    veinypea Reformed Router Member

    Koitsu what is the best way to get the signal stats from my cable modem?
     
  9. koitsu

    koitsu Network Guru Member

    It varies depending on the exact brand and model string, and also depends on how the vendor chose to implement things (some require the source IP doing the request be on the same subnet as the modem's administrative interface, while others (like Motorola) do not). Cable modems are "weird" because they're supposedly layer 2 bridges but they pay attention to layer 3 packets on the same interface.

    If it's a Motorola, try http://192.168.100.1/
     
  10. mstombs

    mstombs Network Guru Member

    I seem to still be on shibby 110, but also have a similar issue, router has trouble renewing the wan dhcp lease:-

    Code:
    Dec 15 11:34:33 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 14:13:54 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 15:33:34 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 16:13:24 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 16:33:18 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 16:43:16 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 16:48:14 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 16:50:43 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 16:51:57 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 16:52:34 rtn66u daemon.info udhcpc[3005]: Sending renew...
    Dec 15 16:52:34 rtn66u daemon.info udhcpc[3005]: Lease of a.b.c.d obtained, lease time 601295
    Renews start at half-time, then get more frequent as lease is runnig out

    But eventually gets it, have actually had this problem for years with same isp/ different modems, and used to need a ping script to do a manual wan restart.
     

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