splanton wrote:
Usually I would be cursing the cable and finding a geek with an occilosope

I've got an oscilloscope ... you calling me a geek? :lol:
(Actually, I was looking for a new project to get stuck into: https://www.allaboutcircuits.com/projects/build-your-own-time-domain-reflectometer/ )

and he wrote: but right now with all the same cabling different routers are working. I am loathed to 'fix something that ain't broke'.

To recap - just confirm, that to date, there is no hard evidence of any link @ 100Mbps, when it should be @ 1Gbps...

Just in case it is a strange incompatibility between your cabling and the 2862, you could try a variation of a test I suggested earlier:
Connect the LAN port of the Hub 6 to a LAN port of the 2862, then connect a 2nd 2862 LAN port to your cable run under test (having switched off DHCP on the 2862).

This would then just be using the 2862 as a simple switch, but it, rather than the Hub 6 would be driving the cable run to the client.

If this makes no difference (place your bets!) ... it must surely be an issue within the 2862, in its passing of data 'twixt WAN and LAN.

Incidentally - and only slightly off-topic - the patch lead that I found, that will not work between two Netgear switches, has a slightly raised contact resistance on one pair in the cable; 5?, instead of 0.5?!
Not detectable using the LED-based tester and has never before had any noticeable effect - but enough to send the Netgear switch into complete denial mode...

That is a healthy test. I will try that tomorrow.
I'm tied up actually using the connection at the moment.

I am back to running 300mb off a BT hub 6 😕

I'm Still on this.

Been in touch with second line support.

Here is the latest:
Still have LAN issues when running over an underground cable to our other building.

Draytek LAN port > cat 6 Patch lead > RJ45 Socket > cat 6 Underground Cable > RJ45 socket > cat 6 Patch Lead > Gb PC

We have now tried 6 different routers and all of them produce Gigabit happily at the PC except both the Draytek 2962's we tried. They throttle the connection to 10/100.

Draytek support are intimating a cabling issue. Fair enough but what could be wrong that would allow 6 other brands of router to work just fine at Gb speeds but upset the Draytek 2862's?
The common factor would appear to be the Draytek in conjunction with the cabling. As you can imagine I am disinclined to rip apart cabling that works just fine with other kit.

Anyone had an equally odd cabling issue?
Is there something I am missing on cat6 cable standards that could be causing this?
Could the Draytek be detecting something the others are not?
Help?

splanton wrote:
They throttle the connection to 10/100.

So is it a mis-negotiated link - or lots of errors and retries?

and he wrote:
Draytek support are intimating a cabling issue. Fair enough but what could be wrong that would allow 6 other brands of router to work just fine at Gb speeds but upset the Draytek 2862's?
Could the Draytek be detecting something the others are not?

Did you try the experiment of adding the 2862 LAN ports, to an otherwise working Hub 6 link?

and you could try the opposite ...

i.e. feeding the 2862 LAN port to a Hub 6, just used as a switch, to drive the line.

Or...

You could invest in a Netgear GS105Ev2 as your 'line driver'. (A snip at only £25 ish ... if I got the link correct)

I only mention this switch, because I know it has a 'line tester' built in. If it suffers from the same issue as the Draytek, it should be able to say so!

These things won't say what is wrong, but may say "if" the line is in error. They may even work around it...

Back on this particular band wagon.

It looks like an ethernet cable >30m causes port sensing issues on a 2862.

I have finally done some more testing on this and can confirm the following:

1. We have run a new cable, new rj45 sockets and plugs etc and fully tested it for continuity and resistance.
2. We have tried a 30 meter RJ45 -RJ45 and it did not operate at Gb speeds
3. We moved the equipment closer <5m and it all worked at Gb
4. We tried using the setup in diagram1.jpg with all the new cabling and it did not work at Gb
5. We tried using the setup in diagram2.jpg with all the new cabling and it worked at Gb
6. We tried using four other routers and they all worked at Gb
7. We tried using the setup in diagram1.jpg and swapped the LAN ports on the Draytek and it did not work at Gb

Diagram 1.


Diagram2.


In short we are 100% confident that it is a port sensing issue on the Draytek 2862.

EVERY configuration and piece of equipment works totally on my network at Gb speeds apart from the Draytek 2862 as soon as you try to use it over a 'long line' it reverts to 10/100.
Considering my patch leads are 4m in total and my ethernet cable is 30m (which allows for a few extra meters for coming out of the ground, routing through walls and termination) my cabling is well within 10Gb standards.

Humph!

Well I'm glad you've now got a configuration that works, though clueless as to what the actual fault might be. (The Vigor's LAN ports are probably implemented using a specialised chipset that is used in zillions of other products (not just Draytek's)).

I am surprised though, that this fault wasn't noticeable through a lack of "1Gbps" LED on both the Tplink and the Vigor 2862...
(Not to mention the "Port Status" command in the Vigor's Telnet interface)

Code:

> port status % port 1 : link DOWN, speed= ---- Mbps, duplex= ----, FlowControl= -- % port 2 : % port 3 : % port 4 : % port 5 : % port 6 : link UP , speed= 1000 Mbps, duplex= FULL, FlowControl= OFF % WAN2 : link DOWN, speed= ---- Mbps, duplex= ----, FlowControl= -- >