TP Link Archer VR900 ppp1 LCP down Disconnection

[#1]

Hi, i've just recently upgraded my router to an all in one VDSL Router TP-Link Archer VR900 using the latest firmware 150909, however im noticing that i temporarily lose connection every day or so when my Dynamic IP address changes / resets, the maximum i can set it for is two days (minutes 1-2880), Connection Mode is set to Always On, as you can see here in my log i lost the connection at precisely 06:13 am on 07/10/2015 until 06:17am
is this a fault with my modem or line? i dont think i should lose the connection when the Dynamic IP address changes as i never did with my old set up using an ECI Modem where my IP didn't change as frequently, sometimes for as long as 2 /3 months
I have made a post on the TP Link forum too just in case its a Router settings / modem issue & not a line fault, i need to determine which it is

[#2]

Some suggestions you could try:
1. Try older firmware on your VR900 router
150729 appears to be available.

If it doesn't make any difference, then:
2. Reinstate your ECI modem.
On your VR900, go to Advanced tab -> Operation mode and reconfigure your VR900 to operate in 'Wireless Router mode'. Then wire LAN4/EWAN port from your VR900 to your ECI modem.
If it resolves the broadband disconnection problem, it would point to an issue with the VR900's modem.

Good luck.

[#3]

The connection dropped again this afternoon at 13:59pm so it cannot be the lease time causing it as its before the 2 days was up, theres something intermittently causing the modem to disconnect & reassign a new IP address, the network stats show a few more errors on the Upstream while the Downstream has zero errors (see attachments)
Im not quite happy downgrading firmware as theres been a few bugs which needed to be addressed by the latest firmware patch but ill try it temporarily just to see if it makes a difference but i doubt it http://uk.tp-link.com/download/Archer-VR900.html#Firmware
Had no reply on the TP-Link forum, i had to register first & they seem a bit slow on allowing a post to show up since its not even been posted in the forum yet, think ill try my retailer at Box.co.uk where i bought it from & see about getting a replacement

[#4]

The 2880 minutes lease time you quoted, only affects the DHCP issued LAN IP addresses, beginning 192.168.x.x, to locally attached wired and wireless devices.  It has no effect on the WAN IP address issued by Plusnet's DHCP servers.
Broadband disconnections would cause the WAN IP address to change when the VR900 reconnects to the broadband service given you don't have a static IP address.

[#5]

Well i've returned it back to Box whose engineers are assessing it to see if theres a fault (ill get charged a £20 fee if they don't find one T&Cs), anyway they should since i've plugged back in my ECI modem with the Asus RT-N66U router & had no disconnections from the internet, my TBB graph would reset & turn red if i had due a new assigned IP address, been running it solid for 5 days now, i know its dynamic but i shouldn't lose connection when it changes & it shouldn't change every 1 to 2 days, so definitely a modem issue, this also shows its not a line fault.
Interesting to note that my TBB graphs minimum latency went back up to around 40ms using the ECI modem (as it was before) but using the broadcom chipset in the TP-Link router it syncs at 15ms, just goes to show the difference, although its strange why my minimum latency is higher on Plusnet fibre than it was when i was on Sky (15ms) using the same ECI modem?

[#6]

Just to clarify something here, your external IP will not change unless there is a disconnection. Only when the authentication or sync drops will this alter.

[#7]

That must be whats happening then, the modem is dropping the sync for some reason & then re-establishes a connection which causes the ip address to change, hopefully the tech department at Box will see this if they monitor it long enough, i just hope this is an isolated case & not a common fault with the TP-Link Archer VR900 series in general? i googled it but nothing comes up, i installed the latest firmware
dick:quote

[#8]

Update: it turns out that the modem was faulty, the engineers reported that it was unable to pick up an ip address which i find odd since i would not have been able to connect to the internet at all which i could but only for a day or so until it lost sync

[#9]

This looks very similar to a TPlink VDSL modem/router I have been using on a Fibre connection,  not the VR1900, a TP-Link TD9970.
It loses sync once a day, usually in the early hours and after reconnecting seems ok, as I only changed over to Fibre on Tuesday I thought it was the connection finding a stable rate, now I am starting to think, maybe not.
It has the latest firmware and ran without any problems on ADSL2+ for two weeks before the change to Fibre.  If it continues I may have to try the BT modem and the TP Link as a router, I don't really want to do this a I have only been connected to Fibre for 3 days and don't want to chop and change too much.
Router Logs
1 2015-10-23 03:12:25 PPP Warning ppp1 LCP down
2 2015-10-23 03:12:25 PPP Error ppp1 LCP down
3 2015-10-23 03:12:00 PPP Error ppp1 
4 2015-10-23 03:12:00 PPP Error ppp1 Timeout waiting for PADO packets
5 2015-10-23 03:11:09 PPP Error ppp1 
6 2015-10-23 03:11:09 PPP Error ppp1 User request
7 2015-10-23 03:11:09 PPP Error ppp1 User request
8 2015-10-23 03:11:09 PPP Warning ppp1 LCP down
9 2015-10-23 03:11:02 PPP Error ppp1 LCP down
10 2015-10-23 03:11:02 PPP Error ppp1 User request
11 2015-10-22 06:22:14 PPP Warning ppp1 LCP down
12 2015-10-22 06:22:14 PPP Error ppp1 LCP down
13 2015-10-22 06:21:49 PPP Error ppp1 
14 2015-10-22 06:21:49 PPP Error ppp1 Timeout waiting for PADO packets
15 2015-10-22 06:20:58 PPP Error ppp1 
16 2015-10-22 06:20:58 PPP Error ppp1 User request
17 2015-10-22 06:20:58 PPP Error ppp1 User request
18 2015-10-22 06:20:51 PPP Warning ppp1 LCP down
19 2015-10-22 06:20:51 PPP Error ppp1 LCP down
20 2015-10-22 06:20:51 PPP Error ppp1 User request
21 2015-10-20 21:01:45 PPP Warning ppp1 LCP down
22 2015-10-20 21:01:45 PPP Error ppp1 LCP down
23 2015-10-20 21:01:26 PPP Error ppp1 
24 2015-10-20 21:01:26 PPP Error ppp1 Timeout waiting for PADS packets
25 2015-10-20 21:00:32 PPP Error ppp1 
26 2015-10-20 21:00:28 PPP Warning ppp1 LCP down
27 2015-10-20 21:00:28 PPP Error ppp1 LCP down
28 1970-01-01 00:00:53 PPP Warning ppp1 LCP down
Buggy firmware maybe?
   

[#10]

Sounds like the modem in the router is faulty just as it was with mine, as you say try it with your BT Modem to see if it does the same thing, you could also run a TBB Ping Graph as an extra measure to determine its not your broadband connection http://www.thinkbroadband.com/ping
Im getting a replacement router sent to me but this time i wont update the firmware straight away until i know the modem stable

[#11]

I'm going to try the BT modem and this router today, connecting through the 9970 EWan port and see if that does anything different.  I also have a TP- Link 8968 with an EWan port to try if the same problem occurs.
Both these routers have worked with absolutely no problems on ADSL2+ with good speeds and stability.  Since the change to Fibre it seems to have been one big PITA. 
The old saying  'If it aint broke don't fix it'  seems very true right now.
Could you let me know how things go when you try this replacement.
Ron

[#12]

Well i received a replacement, kept the stock firmware & im having the same issues again but more frequently it seems, it was off all day on Sunday until late afternoon, rebooting & switching off the modem did not bring it back online, yet my internet connection was solid when i was using my Asus RT66u & separate BT Modem while waiting for the replacement, so unless im very unlucky then TP-Link are making unreliable router / modems not fit for fibre, im going to have to return this router back, its just not good enough, had a few disconnections early Monday morning aswell, maybe its overheating causing the issue? as it gets quite hot, inadequate ventilation
73 2015-10-26 06:54:42 PPP Information ppp1 sent [LCP ConfAck id=0xad <mru 1492> <auth chap MD5> <magic 0x4507a20f>]
74 2015-10-26 06:54:42 PPP Information ppp1 rcvd [LCP ConfReq id=0xad <mru 1492> <auth chap MD5> <magic 0x4507a20f>]
75 2015-10-26 06:54:42 PPP Information ppp1 sent [LCP ConfReq id=0x1 <mru 1480> <magic 0x355e9de0>]
76 2015-10-26 06:54:42 PPP Information ppp1 rcvd [PADS SessionID(0x8b03)]
77 2015-10-26 06:54:42 PPP Information ppp1 sent [PADR Host-Uniq(0x00000650)]
78 2015-10-26 06:54:42 PPP Information ppp1 rcvd [PADO PeerMac(00-30-88-00-00-08)]
79 2015-10-26 06:54:42 PPP Information ppp1 sent [PADI Host-Uniq(0x00000650)]
80 2015-10-26 06:54:18 PPP Error ppp1
81 2015-10-26 06:54:18 PPP Error ppp1 Timeout waiting for PADO packets
82 2015-10-26 06:53:58 PPP Information ppp1 sent [PADI Host-Uniq(0x0000059c)]
83 2015-10-26 06:53:48 PPP Information ppp1 sent [PADI Host-Uniq(0x0000059c)]
84 2015-10-26 06:53:46 DHCPD Notice Recv INFORM from C87:19:1E:45:4C
85 2015-10-26 06:53:43 PPP Information ppp1 sent [PADI Host-Uniq(0x0000059c)]
86 2015-10-26 06:53:19 PPP Error ppp1
87 2015-10-26 06:53:19 PPP Error ppp1 Timeout waiting for PADO packets
88 2015-10-26 06:52:59 PPP Information ppp1 sent [PADI Host-Uniq(0x00000405)]
89 2015-10-26 06:52:54 DHCPD Notice Send ACK to 192.168.1.102
90 2015-10-26 06:52:54 DHCPD Notice Recv REQUEST from C87:19:1E:45:4C
91 2015-10-26 06:52:49 PPP Information ppp1 sent [PADI Host-Uniq(0x00000405)]
92 2015-10-26 06:52:44 PPP Information ppp1 sent [PADI Host-Uniq(0x00000405)]
93 2015-10-26 06:52:25 PPP Error ppp1
94 2015-10-26 06:52:21 PPP Information ppp1 sent [LCP TermReq id=0x4 "User request"]
95 2015-10-26 06:52:18 PPP Information ppp1 sent [LCP TermReq id=0x3 "User request"]
96 2015-10-26 06:52:18 PPP Warning ppp1 LCP down
97 2015-10-26 06:52:18 PPP Error ppp1 LCP down
98 2015-10-26 06:52:18 PPP Error ppp1 User request
99 2015-10-26 06:38:46 DHCPD Notice Recv INFORM from C87:19:1E:45:4C
100 2015-10-26 06:23:46 DHCPD Notice Recv INFORM from C87:19:1E:45:4C
101 2015-10-26 06:09:48 DHCPD Notice Recv INFORM from C87:19:1E:45:4C
102 2015-10-26 06:08:46 DHCPD Notice Recv INFORM from C87:19:1E:45:4C
103 2015-10-26 05:58:32 DHCPD Notice Recv INFORM from C87:19:1E:45:4C
104 2015-10-26 05:53:46 DHCPD Notice Recv INFORM from C87:19:1E:45:4C

[#13]

It does look like there is a fault on the modem side on both of these TP-Link models.  The same fault on both are too similar.
I set up the TD9970 with the BT modem yesterday, it's been connected now for over 24 hours with no drops in sync.  I am going to leave it for 3 or 4 days to see how stable this setup is.  If this stops the connection dropping as before this would seem to indicate the modem is faulty.
I will return it to Amazon and get another VDSL modem/router, not the same model and probably not a TP-Link.
TP-Link modem /routers seem to get fairly good reviews so maybe we've both been unlucky and got faulty VDSL ones. 

[#14]

Well i decided to install the latest firmware since i now know that wasn't the issue, however i did stumble upon something that might be worth trying in regards to PPP dropping, go into router setup > Advanced > Internet > (click modify) then click on Advanced arrow which will reveal some extra features, in there you will find Echo Request Interval, by default its set to 30 so i have now set it to 0 after reading these posts on PPP dropping http://forums.thinkbroadband.com/dslrouter/4281264-tp-link-td-w8968-pppoe-disconnects-dling-large-fi... & http://drlforum.co.uk/showthread.php?tid=605 which i discovered after googling 'tp-link archer Echo Request Interval' simply out of curiosity to find out what it does, it seems to fix some issues, so worth a shot, i'll see how it goes
Update: That didn't work so im returning it back, 3rd time lucky if not then its safe to say TP Link have produced unreliable vdsl modems for their routers, im surprised there are not more complaints about the same issues
327 2015-10-27 13:45:41 PPP Information ppp1 sent [PADI Host-Uniq(0x00001850)]
326 2015-10-27 13:45:37 PPP Information ppp1 sent [PADI Host-Uniq(0x00001850)]
325 2015-10-27 13:45:23 PPP Error ppp1
324 2015-10-27 13:45:19 PPP Information ppp1 sent [LCP TermReq id=0x4 "User request"]
323 2015-10-27 13:45:16 PPP Information ppp1 sent [LCP TermReq id=0x3 "User request"]
322 2015-10-27 13:45:16 PPP Warning ppp1 LCP down
321 2015-10-27 13:45:16 PPP Error ppp1 LCP down
320 2015-10-27 13:45:15 PPP Error ppp1 User request
319 2015-10-27 13:44:33 DHCPD Notice Recv INFORM from C8:D7:19:1E:45:4C
318 2015-10-27 13:43:31 DHCPD Notice Recv INFORM from C8:D7:19:1E:45:4C
317 2015-10-27 13:43:27 DHCPD Notice Send ACK to 192.168.1.102
316 2015-10-27 13:43:27 DHCPD Notice Recv REQUEST from C8:D7:19:1E:45:4C
315 2015-10-27 11:13:14 DHCPD Notice Send ACK to 192.168.1.101
314 2015-10-27 11:13:14 DHCPD Notice Recv REQUEST from 90:C1:15:17:37:68
313 2015-10-27 09:55:59 PPP Information ppp1 sent [IPCP ConfAck id=0x4c <addr 195.166.130.140>]
312 2015-10-27 09:55:59 PPP Information ppp1 rcvd [IPCP ConfReq id=0x4c <addr 195.166.130.140
311 2015-10-27 09:55:59 PPP Information ppp1 rcvd [IPCP ConfAck id=0x2 <addr 83.216.158.237> <ms-dns1 212.159.6.10> <ms-dns2 212.159.6.9
310 2015-10-27 09:55:59 PPP Information ppp1 sent [IPCP ConfReq id=0x2 <addr 83.216.158.237> <ms-dns1 212.159.6.10> <ms-dns2 212.159.6.9
309 2015-10-27 09:55:59 PPP Information ppp1 rcvd [IPCP ConfNak id=0x1 <addr 83.216.158.237> <ms-dns1 212.159.6.10> <ms-dns2 212.159.6.9
308 2015-10-27 09:55:59 PPP Information ppp1 sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
& again early this morning
269 2015-10-27 09:12:35 PPP Information ppp1 rcvd [CHAP Success id=0x12 ""]
268 2015-10-27 09:12:35 PPP Information ppp1 sent [CHAP Response id=0x12 <0d42feba24f4d02400b20a3590050849>, name = "shylok@plusdsl.net"
267 2015-10-27 09:12:35 PPP Information ppp1 rcvd [CHAP Challenge id=0x12 <b1b3c1b552bce8890694acb3c64444ad7e87c85ebe>, name = "JUNOS"]
266 2015-10-27 09:12:35 PPP Information ppp1 rcvd [LCP ConfAck id=0x2 <mru 1480> <magic 0x32f60dab>]
265 2015-10-27 09:12:35 PPP Information ppp1 sent [LCP ConfAck id=0xc0 <auth chap MD5> <magic 0x70dac26b>]
264 2015-10-27 09:12:35 PPP Information ppp1 sent [LCP ConfReq id=0x2 <mru 1480> <magic 0x32f60dab>]
263 2015-10-27 09:12:35 PPP Warning ppp1 LCP down
262 2015-10-27 09:12:35 PPP Error ppp1 LCP down
261 2015-10-27 09:12:35 PPP Information ppp1 rcvd [LCP ConfReq id=0xc0 <auth chap MD5> <magic 0x70dac26b>]
260 2015-10-27 09:12:34 PPP Information ppp1 sent [CHAP Response id=0x1 <7f8922c70aa5012a87115ee9ac974a12>, name = "shylok@plusdsl.net"]
259 2015-10-27 09:12:34 PPP Information ppp1 rcvd [CHAP Challenge id=0x1 <31010735d1fdac23a4336bfd91c3f72b>, name = "bras-red4.mr-dh"]
258 2015-10-27 09:12:34 PPP Information ppp1 rcvd [LCP ConfAck id=0x1 <mru 1480> <magic 0xc9c801af>]
257 2015-10-27 09:12:34 PPP Information ppp1 sent [LCP ConfAck id=0x7d <mru 1492> <auth chap MD5> <magic 0x77dc9d35>]
256 2015-10-27 09:12:34 PPP Information ppp1 rcvd [LCP ConfReq id=0x7d <mru 1492> <auth chap MD5> <magic 0x77dc9d35>]
255 2015-10-27 09:12:34 PPP Information ppp1 sent [LCP ConfReq id=0x1 <mru 1480> <magic 0xc9c801af>]
254 2015-10-27 09:12:34 PPP Information ppp1 rcvd [PADS SessionID(0x7608)]
253 2015-10-27 09:12:34 PPP Information ppp1 sent [PADR Host-Uniq(0x00006bd1)]
252 2015-10-27 09:12:34 PPP Information ppp1 rcvd [PADO PeerMac(00-30-88-00-00-08)]
251 2015-10-27 09:12:34 PPP Information ppp1 sent [PADI Host-Uniq(0x00006bd1)]
250 2015-10-27 09:12:08 PPP Error ppp1
249 2015-10-27 09:12:08 PPP Error ppp1 Timeout waiting for PADO packets
248 2015-10-27 09:11:48 PPP Information ppp1 sent [PADI Host-Uniq(0x00006b25)]
247 2015-10-27 09:11:38 PPP Information ppp1 sent [PADI Host-Uniq(0x00006b25)]
246 2015-10-27 09:11:33 PPP Information ppp1 sent [PADI Host-Uniq(0x00006b25)]
245 2015-10-27 09:11:07 PPP Error ppp1
244 2015-10-27 09:11:07 PPP Error ppp1 Timeout waiting for PADO packets
243 2015-10-27 09:10:47 PPP Information ppp1 sent [PADI Host-Uniq(0x00006a69)]
242 2015-10-27 09:10:37 PPP Information ppp1 sent [PADI Host-Uniq(0x00006a69)]
241 2015-10-27 09:10:32 PPP Information ppp1 sent [PADI Host-Uniq(0x00006a69)]
240 2015-10-27 09:10:13 PPP Error ppp1
239 2015-10-27 09:10:09 PPP Information ppp1 sent [LCP TermReq id=0x4 "User request"]
238 2015-10-27 09:10:06 PPP Information ppp1 sent [LCP TermReq id=0x3 "User request"]
237 2015-10-27 09:10:06 PPP Warning ppp1 LCP down
236 2015-10-27 09:10:06 PPP Error ppp1 LCP down
235 2015-10-27 09:10:06 PPP Error ppp1 User request
234 2015-10-27 08:49:57 PPP Information ppp1 sent [IPCP ConfAck id=0x78 <addr 195.166.130.192

[#15]

How can I tell whether it's the router losing PPP (due to faulty router) or whether it's DLM kicking in?  I have a TD-W9980 and it does seem to re-connect every other day, if not daily. The longest I stayed connected for was 4 days if I recall correctly.  I check the profile regularly too and it does seem to move around a little but above 77Mbps.