MT stops working if gateway down >15 sec

RouterOS General
1

Hi,

I have built an MT router with two ethernet ints, 1 for lan and 1 for wan.

The wan connects to a vigor 2600we which is my gateway. As the vigor crash evry now and then I cyclye the power on it via a timer every 3 hrs for 1 min (min time period pos). This results in the lan not been able to access the internet, the only way I have been to reastablish internet is to reboot the MT.

Currently I am using watchdog to do this. This is a pain and also no good in the long term as I am looking at geting 2 adsl links and I don’t want the MT down very time I power cycle the gateways as this rather negates the point of having two adsl links.

I have observed that if the gate way is only off for <15 secs (approx) I don not have this problem.

Any surgestion on how to stop this happening would be much appreciated.

2

Have you thought about replacing the Draytek with a simple DSL modem and then using MikroTik PPPoE implementation as your uplink router?

3

Well I have observed the MT seems to be based around modems rather than gateways, so yes to the first bit as for the PPPoE, not there yet.

However ehernet adsl modems are not easy to find & cost as much as a gateway, so natrually I would lean to a gateway.

Also I am not as well funded as when I got the 2600, so I would much prefer to use it and save the £££ and it did seem to be going OK.

I forgot to say that I have tried 2 ways of passing the isp dns details/ip to the wan card. Ether using dchp on the gateway to pass the detail to the dchp client on the wan, or just hardcoding the ip/details to the wan card. In both cases I have the same problem.

4

Have also relised that I did not have this prob when I had the gateway on the lan side of things (so actually the was no wan side (if you see what I mean))

5

The modem is probably remembering a MAC address and having problems clearing its arp or something. If you just unplug the MT for 30 seconds after there is no connectivity does it work when plugging it back in, or do you absolutely have to reboot the MT to make it work? See if you can get connectivity again without rebooting the MT.

Sam

6

Ok not sure I fully follow you but did this. Turned watchdog off, powered down the gatway for 1 min. No conectivity so unpluged the patch cable from gateway for 30 secs, no internet, so rebbot MT.

I am not saying rebooting is the only way to fix the prob, but I don’t know of any other.

Also I can ping from the lan to the wan card but not the gateway.

7

OK fixed it, put a different net card in & it looks ok now.

Thanks for the surgestions.

Anybody got a way to use watchdog or something like it to enable the power cycle/reboot of a gateway(psudo modem) if it crashes?