Line keeps going down... - Community home

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Random periods, the system just goes offline for about 10 seconds then back on as if nothing ever happened.

The syslog contains messages such as

03/26/2021

12:06:19

8021q 'eth0_guest' link is up

wan

03/26/2021

12:06:19

Network device 'eth0' link is up

wan

03/26/2021

12:06:19

[4041879.533940] br-lan: port 1(eth0) entered listening state

system

03/26/2021

12:06:19

[4041879.533728] eth0 (Ext switch port: 0) (Logical Port: 😎 Link UP 100 mbps full duplex

system

03/26/2021

12:06:06

[4041866.433865] br-guest: port 3(eth0_guest) entered disabled state

system

03/26/2021

12:06:06

8021q 'eth0_guest' link is down

wan

03/26/2021

12:06:06

Probing device <mac removed cause you have a stupid filter preventing macs> IP address 192.168.1.39 on interface br-lan

lan

03/26/2021

12:06:06

Network device 'eth0' link is down

wan

03/26/2021

12:06:06

[4041866.423081] br-lan: port 1(eth0) entered disabled state

system

As you can see the wan port just shuts down, I have tried a new cat5 cable between the router and fibre module (even though the original is only a couple of months old) but this appears to not have fixed the fault. It happens at random times no pattern. When this happens all lights on the front of the hub remain on as if no fault.

I spoke with support on Facebook who couldn't help, I was given a phone number but thats no good when trying to relay information taken from the eventlog on the device.

5 REPLIES 5

What router are you using .

Are you on gigafast or fttc

If you are on gigafast is your issue with fibre or ethernet

If you log into the Router what is the PPP session uptime on the status page .

If you are talking about ethernet. do you have any hubs or switch units . Or power line extended .

What and how many devices are you running on your network

Cat 5 is 100 meg

Cat5a is 1000meg

Cat 6 is 1000meg

Those reports are at the wan port on the vodafone gigafast router fttp, weirdly when the wan port disconnects and the whole internet goes down, the PPP session doesn't show a disconnect.

p.s don't know why you put this meaningless, and actually incorrect stuff at the bottom of your post

"Cat 5 is 100 meg

Cat5a is 1000meg

Cat 6 is 1000meg "

Why are you using a 100meg cat5 cable beween the router and the fibre module.

I could be wrong but if the ppp is still showing as connected then i dont think the internet has dropped .

ring vodafone up and ask them how many times you have disconnected . Vodafone can check this as it will be show on vodafobe logs .

May be worth checking the vodafone name server thats is still playing up

If i use the vodafone name server i keep getting issue where my sky box keeps disconnecting for around 10 seconds and then reconnects same as the laptop etc

Ps the actually incorrect stuff as you put it is actually correct

Category	Max speed transmission	Max bandwidth
Cat 5	100 Mbps	100 MHz
Cat 5e	1,000 Mbps	100 MHz
Cat 6	1,000 Mbps	250 MHz
Cat 6a	10,000 Mbps	500 MHz
Cat 7	10,000 Mbps	600 MHz
Cat 7a	10,000 Mbps	1,000 MHz

It's not 100mb cat5, I noticed that myself in the log, its either

a) a display problem

b) it negotiates at 100mb during coming back online but moving to 1000 (which is very weird if it is)

Edit, just scanned through another log after I got the fault, it the line comes up as 1000. to me this sounds like either the port is faulty either on the fibre or the router.

It is deffo 1000mb though, otherwise I wouldn't be getting 940/940 ish on speeds. I also don't use vodafones NS, always used 8.8.8.8, 8.8.4.4 or 1.1.1.1

All I know is at random times, the "internet" goes down and the syslog shows that eth0 link is down

secondly you said cat5"a" ...,, also I bet you now I can run higher than 2Gb on a cat5e and I could achieve 10Gb on a cat6 (not a). But yes I was just being facetious.

@Emexrulsier wrote:
b) it negotiates at 100mb during coming back online but moving to 1000 (which is very weird if it is)

I believe it's quite normal for Ethernet devices to negotiate at a low speed until they know what is the fastest they can both do. A problem is they don't know what the cable connecting them is so they can negotiate a speed that the cable can't support.