No internet for over an hour, intra-day - what's wrong in this logging?

[Anonymous User]

For about 90minutes in the middle of the day, all of our devices got kicked off the internet (which is obviously a problem when we're all working from home).

The wifi kept dropping out and reconnecting, and even when our phones/PCs did have a connection, there was still no internet (except maybe the odd short burst).

During the 90 minutes, all the lights on the router were green, so it wasn't clear if it was wifi or broadband related. Tried restarting the router - didn't help. 

I connected a laptop via ethernet cable, and had the same issue, so probably internet-related, even though the router-light was green.

Live chat agents were not available at the time (via mobile data on my phone), and at 15:54 I was just about to call try calling NOWTV, when it suddenly all started working again.

Later on, when it was all working, I got through to the support team, who checked the line and found it fine, and suggested I do a router factory reset later, which I will.

My worry with a problem that came out of nowhere and went away by itself is that it will reappear.

Can someone please interpret the router logging below for me please, from when I last restarted the router at 14:54 to around 15:54 when it came back?

(The router admin console/website showed the WAN as UP, but the Connect button was (as usual) enabled, and I think it was some time after I clicked it that the internet returned. Not sure if related.)

Is there something in the log that indicates why internet wasn't available during that first 60 minutes?

And is "No lease renewal received" normal?

Many Thanks.

Jan 1 00:00:08 syslog: BusyBox v1.17.2
Jan 1 00:00:08 syslog: plc0 (Int switch port: 4) (Logical Port: 4) Link UP 100 mbps full duplex
Jan 1 00:00:19 syslog: [ 19.816000] Line 0: xDSL G.994 training
Jan 1 00:00:22 syslog: [ 22.830000] Line 0: ADSL link down
Jan 1 00:00:41 syslog: sky dhcpc client (v0.0.1) started
Jan 1 00:00:43 syslog: [ 43.863000] Line 0: xDSL G.994 training
Jan 1 00:00:58 syslog: [ 58.867000] Line 0: VDSL G.993 started
Jan 1 00:01:10 syslog: [ 70.620000] Line 0: VDSL2 link up, Bearer 0, us=6940, ds=39999
Jan 1 00:01:10 syslog: [ 70.625000] Line 0: VDSL2 link up, Bearer 1, us=0, ds=0
Jan 1 00:01:44 syslog: ptm0.1 - WAN link UP.
Jan 1 00:01:44 syslog: Received valid DHCP lease from server. Connection UP.
Jan 1 00:01:45 syslog: Connection Up. SNO/MAC/IP/SWVER: [D11018AB012462/xxxxxxxxFA38/5.xxx.xxx.xxx/2.90.2471.R]
Jan 1 00:01:45 syslog: Send out NTP request to ntp1.isp.sky.com
Jan 1 00:01:45 syslog: Time has been set from ntp1.isp.sky.com
Feb 3 14:54:31 syslog: Received NTP Sync Reply from ntp1.isp.sky.com
Feb 3 14:54:31 syslog: VCOP agent started.
Feb 3 15:02:54 syslog: Administrator login successful from IP: 192.168.0.2 .
Feb 3 15:22:57 syslog: No lease renewal received
Feb 3 15:28:04 syslog: Administrator logged out from IP address 192.168.0.2 .
Feb 3 15:29:15 syslog: [ 2189.971000] eth1 (Int switch port: 6) (Logical Port: 6) Link UP 1000 mbps full duplex
Feb 3 15:35:46 syslog: No lease renewal received
Feb 3 15:38:44 syslog: [ 2759.587000] eth1 (Int switch port: 6) (Logical Port: 6) Link DOWN.
Feb 3 15:38:51 syslog: [ 2766.639000] eth1 (Int switch port: 6) (Logical Port: 6) Link UP 1000 mbps full duplex
Feb 3 15:45:22 syslog: The user with IP address 192.168.0.40 has failed to log in.
Feb 3 15:45:35 syslog: Administrator login successful from IP: 192.168.0.40 .
Feb 3 15:45:47 syslog: WAN connection request from user through GUI
Feb 3 15:46:32 syslog: WAN connection request from user through GUI
Feb 3 15:46:42 syslog: No lease renewal received
Feb 3 15:47:04 syslog: WAN connection request from user through GUI
Feb 3 15:51:08 syslog: No lease renewal received
Feb 3 15:52:41 syslog: No lease renewal received
Feb 3 15:54:27 syslog: No lease renewal received
Feb 3 15:54:27 syslog: DHCP lease expired. -> DISCOVERY 3600
Feb 3 15:54:36 syslog: ptm0.1 - WAN link UP.
Feb 3 15:54:36 syslog: Received valid DHCP lease from server. Connection UP.
Feb 3 15:54:36 syslog: Connection Up. SNO/MAC/IP/SWVER: [D11018AB012462/xxxxxxxxFA38/94.xxx.xxx.xxx/2.90.2471.R]
Feb 3 15:54:37 syslog: VCOP agent started.
Feb 3 15:56:38 syslog: [ 3832.890000] eth1 (Int switch port: 6) (Logical Port: 6) Link DOWN.
Feb 3 16:03:02 syslog: Administrator logged out from IP address 192.168.0.40 .
Feb 3 16:13:15 syslog: Administrator login successful from IP: 192.168.0.2 .
Feb 3 16:22:57 syslog: Lease renewed 3600 ip 94.xxx.xxx.xxx
Feb 3 16:22:57 syslog: VCOP agent started.
Feb 3 16:33:56 syslog: [ 6071.304000] eth0 (Int switch port: 3) (Logical Port: 3) Link UP 1000 mbps full duplex
Feb 3 16:35:02 syslog: [ 6136.677000] eth0 (Int switch port: 3) (Logical Port: 3) Link DOWN.
Feb 3 16:35:05 syslog: [ 6139.714000] eth0 (Int switch port: 3) (Logical Port: 3) Link UP 1000 mbps full duplex
Feb 3 16:54:25 syslog: Lease renewed 3600 ip 94.xxx.xxx.xxx
Feb 3 16:54:25 syslog: VCOP agent started.
Feb 3 16:59:26 syslog: Send out NTP request to ntp1.isp.sky.com
Feb 3 16:59:26 syslog: Received NTP Sync Reply from ntp1.isp.sky.com
Feb 3 16:59:26 syslog: System time is up to date
Feb 3 17:29:10 syslog: Lease renewed 3600 ip 94.xxx.xxx.xxx
Feb 3 17:29:11 syslog: VCOP agent started.

[Anonymous User]

I had similar issues today after Internet Connection kept lagging and dropping out on my own MODEM/router setup, so I decided to test the connection back on the NOWTV Hub and had similar issues.

From your logs, we can glean that your router:

After 01m44, got a DHCP lease (i.e. a WAN address) using the sky DHCP client.

After 01m45 your router was able to set the time, which also shows a successful DNS query was made.

At various intervals starting after 30 minutes up, the router was expecting a DHCP renewal, it was requesting this at reducing intervals until 15:54:27 when the lease expired, but it got a new one at 15:54:36 (9 seconds later).

This would indicate that sometime after the time was received but before the first lease renewal was requested the route to the Internet was down, but nothing in the log shows exactly why.

also, "no lease received" is not normal. It means the connection to the DHCP server isn't working.

My experience around 18:00 was similar, the WAN link would setup but I wouldn't get a DHCP WAN IP assignment, despite using the connect button. I had to restart the router to get a WAN IP as nothing in the GUI would help.