Frequent Disconnects - "ppp0 LCP down"

Nessworthy — Fri, 02 Feb 2018 21:15:36 GMT

Hi Everyone!

We've been plagued with random disconnects for several months now (long enough ago that I can't remember if we had the troubles before we switched routers). It affects me in the evening, but what I didn't realise is my partner has has these issues during the day while I'm out, and they've had to reboot the router at least once daily to solve it.

I've got a PC that is wired up to our router. The router also has WiFi capabilities, which are used with several other devices (laptops, phones etc.)

Every so often (hourly, roughly, but can be sporadic) we sort-of lose our internet connection. On the wired PC, if I'm in a discord channel, the audio will cut but will not tell me I've disconnected (if I reconnect, it works fine). If I'm playing a game, it will freeze and eventually disconnect. For games which support reconnecting, it will hang until it times out or I close the game. The weird thing about it is that if I open a browser up I can still browse. The only game I've managed to get running & keep connected is a one called "7 Days to Die", because it has an option to "Disable UNET Networking" Which seems to be some sort of Unity thing.

For wireless devices, any kind of media streaming will stop & it takes some kicking to get back started again. More often than not the problem is temporarily resolved after a router reboot. The devices have full signal strength to the router, but can't seem to use the internet.

The router is connected directly to the BT OpenReach modem, then straight into the wall. We're on the unlimited plus package. We should also be using a static IP.

Our router is a TP-Link AC750 Archer C2 running 0.9.1 4.1 v0032.0 Build 160512.

We have a 2.4GHz and 5GHz network running on channel 4 and 44 respectively.

Our router settings are as follows:

Connected using PPPoE, always on, auto authentication

MTU of 1480b

IGMP proxy enabled, v3

"Use IP address specified by ISP" is unchecked.

Echo request interval is 30

DNS Server: 212.159.6.9 / 212.159.6.10 (Primary/Secondary)

The routers logs appear fine, except there's some very strange log items with off timestamps:

44	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [IPCP ConfAck id=0x2 <addr [OUR IP]> <ms-dns1 212.159.6.9> <ms-dns2 212.159.6.10
45	1970-01-01 00:01:24	PPP	Information	ppp0 sent [IPCP ConfAck id=0x69 <addr 195.166.130.249>]
46	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [IPCP ConfReq id=0x69 <addr 195.166.130.249>]
47	1970-01-01 00:01:24	PPP	Information	ppp0 sent [IPCP ConfReq id=0x2 <addr [OUR IP]> <ms-dns1 212.159.6.9> <ms-dns2 212.159.6.10
48	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [IPCP ConfNak id=0x1 <addr [OUR IP]> <ms-dns1 212.159.6.9> <ms-dns2 212.159.6.10
49	1970-01-01 00:01:24	PPP	Information	ppp0 sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
50	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [CHAP Success id=0xe ""]
51	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [LCP EchoRep id=0x0 magic=0x603767af]
52	1970-01-01 00:01:24	PPP	Information	ppp0 sent [CHAP Response id=0xe <be7fce29e9fe4bbd835eaccb13b880e1>, name = "XXXXXXXXXXXX@plusdsl.n
53	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [CHAP Challenge id=0xe <184ad6a9d3066d2311b08ab7f805149223b96255caff502289>, name = "J
54	1970-01-01 00:01:24	PPP	Information	ppp0 sent [LCP EchoReq id=0x0 magic=0xdc96d612]
55	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [LCP ConfAck id=0x2 <mru 1480> <magic 0xdc96d612>]
56	1970-01-01 00:01:24	PPP	Information	ppp0 sent [LCP ConfAck id=0xf5 <auth chap MD5> <magic 0x603767af>]
57	1970-01-01 00:01:24	PPP	Information	ppp0 sent [LCP ConfReq id=0x2 <mru 1480> <magic 0xdc96d612>]
58	1970-01-01 00:01:24	PPP	Warning	ppp0 LCP down
59	1970-01-01 00:01:24	PPP	Error	ppp0 LCP down
60	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [LCP ConfReq id=0xf5 <auth chap MD5> <magic 0x603767af>]
61	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [LCP EchoRep id=0x0 magic=0x3c567751]
62	1970-01-01 00:01:24	PPP	Information	ppp0 sent [CHAP Response id=0x1 <236c11c8950a74db4e77c1fb1701bff9>, name = "XXXXXXXXXX@plusdsl.n
63	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [CHAP Challenge id=0x1 <cd33c94d034d62aafdcbfaf4f145b945ebca579a30c0b7a1be5fedd984ed7f
64	1970-01-01 00:01:24	PPP	Information	ppp0 sent [LCP EchoReq id=0x0 magic=0x2bc3b752]
65	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [LCP ConfAck id=0x1 <mru 1480> <magic 0x2bc3b752>]
66	1970-01-01 00:01:24	PPP	Information	ppp0 sent [LCP ConfAck id=0x15 <mru 1492> <auth chap MD5> <magic 0x3c567751>]
67	1970-01-01 00:01:24	PPP	Information	ppp0 rcvd [LCP ConfReq id=0x15 <mru 1492> <auth chap MD5> <magic 0x3c567751>]
68	1970-01-01 00:01:23	PPP	Information	ppp0 sent [LCP ConfReq id=0x1 <mru 1480> <magic 0x2bc3b752>]
69	1970-01-01 00:01:23	PPP	Information	ppp0 sent [PADI Host-Uniq(0x00000266)]
70	1970-01-01 00:00:53	PPP	Error	ppp0
71	1970-01-01 00:00:53	PPP	Error	ppp0 Timeout waiting for PADO packets
72	1970-01-01 00:00:33	PPP	Information	ppp0 sent [PADI Host-Uniq(0x00000266)]
73	1970-01-01 00:00:23	PPP	Information	ppp0 sent [PADI Host-Uniq(0x00000266)]
74	1970-01-01 00:00:18	PPP	Information	ppp0 sent [PADI Host-Uniq(0x00000266)]

All the other settings are out of the box. No filtering, no parental control, no forwarding.

SPI Firewall is enabled.

Where do I even start with trying to figure this out? From the other searches I've heard TP Link routers may be trouble for connections, expecially UK ones.

Re: Frequent Disconnects - "ppp0 LCP down"

Nessworthy — Mon, 19 Feb 2018 11:19:01 GMT

Apologies if it's inappropriate to bump a topic - it was flagged as spam & hidden on first posting and wasn't restored until it was dropping off the front page - still struggling with this issue.

Re: Frequent Disconnects - "ppp0 LCP down"

notmyname — Tue, 20 Feb 2018 07:39:05 GMT

Won't help in regards the wired connection dropping, however having the 2.4Ghz channel set to 4 is bound to cause some overlap issues.

Try 1, 6 or 11.

topic Frequent Disconnects - "ppp0 LCP down" in Full Fibre

Frequent Disconnects - "ppp0 LCP down"

Re: Frequent Disconnects - "ppp0 LCP down"

Re: Frequent Disconnects - "ppp0 LCP down"