Draytek Vigor2760

[Mrk26]

Any advice with extra settings for vigor 2670 used in bridge mode?

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[UK Sentinel]

I assume you are into DrayTeK UI and have gone to Network > WAN > and Select Bridge Tab

Then select pure Bridge option and set VLAN encapsulation to 101

This option should disable Firewall Etc, but not tested it myself – I am using an online emulator to see what options there  is

https://www.draytek.com/demo/Vigor2760series/v1.2.1.1/Demo.html#Physical_Port

 

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[Mrk26]

I set bridge mode, no problem here, connecting etc, but looks like it dropping connection every 30s or so, maybe something wrong with it? 🤔<
I can see in game packets dropped and it show connection timeouts, never happened with eci…

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[UK Sentinel]

Try using it as modem and router, remove Bridge and see if that hold a connection ?

(I suspect that it’s just the pppoe session that’s failing, not the VDSL sync)

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[Mrk26]

I will play with it tomorrow, I already had several disconnections with it today, don’t really want to get my line interleaved or even banded. In bridge mode nothing special was set, so I’m surprised that it keep dropping ppoe 🤔.

If I will set it up in modem router mode I guess I will have to enable DMZ for my router to handle all traffic to avoid double NAT.

I also tried two different fw and still the same…

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[UK Sentinel]

I read a while ago – It’s a bug with the firmware I think and having to fragment packets. If you change the settings of the router to enable baby jumbo frames and an MTU of 1508, this may fix stability

(I assume you have latest firmware running ) ?

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[Mrk26]

I tested on fw 3.8.8.2 bt and on the latest 3.8.9.4 bt, on booth is the same. Actually I changed MTU to 1492 on vigor but not sure if that matters in bridge mode ,maybe that is the problem? Should I try non bt fw on it?

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[UK Sentinel]

Mrk26 wrote:

I tested on fw 3.8.8.2 bt and on the latest 3.8.9.4 bt, on booth is the same. Actually I changed MTU to 1492 on vigor but not sure if that matters in bridge mode ,maybe that is the problem? Should I try non bt fw on it?

Try changing MTU to 1508 on BT Firmware first. then if exists, enable baby jumbo frames option, Alas trial and error I am afraid

Then if that fails, replace BT  firmware with standard stock firmware (non-vectoring firmware) for testing and repeat as before

https://community.plus.net/t5/My-Router/Unifi-USG-and-Draytek-Vigor-130-connection-dropping/m-p/1547557#M77362

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Edit: Also, unsure what  router is connecting to DrayTeK, but worth checking you are using best MTU for router:

from cmd prompt (windows) ping google.com -f -l 1472

The -f marks packets that should not be fragmented in the ping. -l 1472 sets the size of the packet.

If you get successful replies, then your current MTU is fine for your connection. If you receive error messages like in the above image, then your packets are getting fragmented.

Keep trying to ping until you get 4 successful replies. Keep decreasing the MTU by 10, so if 1472 fails, try 1462.

You shouldn’t go below 1400.

When you find a value that is successful, start to increase that value by 1, so if 1462 is successful, for example, try again with 1463 etc until you get errors again.

3) When you find a successful value, you can then set a new MTU limit with this value.

You will need to add 28 back on to the value for IP/ICMP overheads, so if 1462 is successful, then 1490 is your MTU limit.

Then change routers MTU to 1490

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[Mrk26]

O.K will play with it tomorrow, don’t really want to get my line banned as I have this router connected for 4h with multiple ppoe sessions dropped. I will post updates.
Thanks a lot for you help.

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[Mrk26]

This is the one working for me: (1464) 1492 is correct and this is what I got set in router, should be the same in Vigor?

Also could you please have look (if you using vigor 130) sys log explorer, enable web syslog and select All in “syslog  type”, what types of logs you have?

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[UK Sentinel]

What is the router you are using ?

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[Mrk26]

Asus rt-ax88u, but don’t think is anything to do with asus. It working perfectly with eci and zyxel VMG1312-B10A.

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[UK Sentinel]

ASUS RT-AX88U should be fine, When family is out later, I will log into DrayTek 130 and see what the logs types are, Draytek currently sitting behind Netgear XR500 so do not have direct access like you can with ASUS router units.

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[admin]

I had a quick look at my DrayTek 130 running BT firmware  3.8.4.1 BT

It looks as though with this firmware the option for sys log explorer, enable web syslog via UI is not available under Diagnostics sub heading:

See below screen dump ;-(

 

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   DrayTek1.png
   

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[Mrk26]

Damn, yours looks very simple compared to vigor2760. The only one thing is wonder me now. I connect wan from asus to lan 2 (192.168.2.1) in vigor and lan 1 (192.168.1.3) from vigor2760 to lan in asus to get stats. Could that be a problem? Lan1 on vigor got dhcp disabled and lan2 got dhcp enabled. Iwas looking for connections example but couldn’t find anything. Shouldn’t I connect only one cable to vigor?

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