I've been having trouble with my Centurylink DSL connection for the past few months and I've finally realized the problem was related to the modem frequently dropping the connection and retraining. It seems to retrain about 20 times in a 24 hour period.
I am using an ActionTec C1000A DSL Modem in transparent bridging mode with a UBNT EdgeRouter Lite.
I've called Centurylink a few times about the issue.
On the first call, I was informed that my line was over-provisioned and this was causing the the issue. I pay for 40Mbps down/20Mbps service and the line was provisioned to 45Mbps. They changed it to provision at 40Mbps. This did not fix the issue.
After a second call, I made an appointment for a technician to check the line. His checks on the line came back fine. However, his supervisor suggested that he have the load coils removed from the line. So, he called the Central Office and had them removed. He told me that if this didn't fix the problem, the problem was with my router. This did not fix the issue either.
So, I turn off transparent bridging mode on the DSL Modem and removed my router from my network. Of course, the problem is still happening and the problem is not with my router. (It's very frustrating that they always seem to blame the customer's equipment.)
I've called CL again and arranged to have another technician visit. The last guy seemed to be out of options. What do I tell this guy?
Below is a recent screen shot of my DSL Admin page and a few lines from the log. I can see now that my upload speed is only at 16.384Mbps. It was provisioned closer to 20Mbps previously.
[att=1]
[att=2]
01/12/2017 08:08:33 PM System Event ICMPv6 RA: from host or unauthorized router 01/12/2017 08:18:44 PM System Event xt_TCPMSS: bad length (589 bytes) 01/12/2017 08:18:46 PM System Event xt_TCPMSS: bad length (589 bytes) 01/12/2017 08:18:47 PM System Event xt_TCPMSS: bad length (589 bytes) 01/12/2017 08:18:47 PM System Event xt_TCPMSS: bad length (589 bytes) 01/12/2017 08:18:47 PM System Event xt_TCPMSS: bad length (589 bytes) 01/12/2017 08:18:47 PM System Event xt_TCPMSS: bad length (589 bytes) 01/12/2017 10:21:46 PM System Event xt_TCPMSS: bad length (589 bytes) 01/13/2017 03:03:40 AM System Event Line 0: xDSL link down 01/13/2017 03:03:42 AM System Event Line 0: xDSL G.994 training 01/13/2017 03:03:45 AM dhcp6s[12207] dhcp6_ctl_authinit: failed to open /etc/dhcp6sctlkey: No such file or directory 01/13/2017 03:03:45 AM dhcp6s[12207] act_load_binding: ifp->pool.pltime equal to 0! 01/13/2017 03:03:47 AM radvd[22904] poll error: Interrupted system call 01/13/2017 03:03:48 AM PPP Link Clear IP addresses. PPP connection DOWN. 01/13/2017 03:03:48 AM System Event Clear IP addresses. Connection DOWN. 01/13/2017 03:03:52 AM System Event Line 0: VDSL G.993 started 01/13/2017 03:04:07 AM System Event Line 0: VDSL G.993 channel analysis 01/13/2017 03:04:08 AM System Event Line 0: VDSL2 link up, Bearer 0, us=16384, ds=40127 01/13/2017 03:04:09 AM PPP Link PPP server detected. 01/13/2017 03:04:09 AM PPP Link PPP session established. 01/13/2017 03:04:09 AM PPP Link PPP LCP UP. 01/13/2017 03:04:09 AM System Event Received valid IP address from server. Connection UP. 01/13/2017 03:04:12 AM radvd[12372] poll error: Interrupted system call 01/13/2017 03:04:12 AM System Event Dead loop on virtual device tun6rd, fix it urgently! 01/13/2017 03:04:13 AM System Event Dead loop on virtual device tun6rd, fix it urgently! 01/13/2017 03:04:14 AM dhcp6s[12647] dhcp6_ctl_authinit: failed to open /etc/dhcp6sctlkey: No such file or directory 01/13/2017 03:04:14 AM dhcp6s[12647] act_load_binding: ifp->pool.pltime equal to 0! 01/13/2017 03:04:31 AM radvd[12800] poll error: Interrupted system call 01/13/2017 03:04:32 AM dhcp6s[13908] dhcp6_ctl_authinit: failed to open /etc/dhcp6sctlkey: No such file or directory 01/13/2017 03:04:32 AM dhcp6s[13908] act_load_binding: ifp->pool.pltime equal to 0! 01/13/2017 05:10:16 AM System Event ICMPv6 RA: from host or unauthorized router
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