I am having some difficulty getting a stable connection on VDSL. The bridged router is a Technicolor TG789vac v3 supplied by IINET. and the Mkrotik router is an RB951G.
The ISP does not use PPPOE, and so the internet traffic flows over Ethernet1 on the MT to the Technicolor and out to the internet. The connection drops every 15 minutes or so, although as far as the ISP is concerned the link stays up. I am using the Mikrotik to create a point to point between two branches and this keeps on dropping causing them all kinds of problems. Web browsing from the site with the new VDSL connection also fails when this happens. This was not happening before switching from an ADSL connection with PPPOE and the ADSL router/MODEM in bridged mode. Can someone give me some troubleshooting advice please?
Too much information missing.
How do you get the WAN IP address the new way as there is no PPPoE, using DHCP or manual configuration?
If using DHCP, do you get always the same one or it is possible that it changes every 30 minutes so the tunel between the Mikrotiks has to re-establish at each change at any of the ends?
What kind of tunnel have you set up between the Mikrotiks?
Is the Technicolor box really in bridge mode? If yes, can you netwatch the gateway (which, if it is a bridged one, should not be the modem itself but something remote; the MAC address of the gateway should give you a hint on this as Technicolor doesn’t manufacture CO side equipment as far as I know) and let the netwatch write a message to log at each state change? Such as
/tool netwatch
add down-script=“/log warning message="default gateway down"” host=ip.of.the.gw interval=5s up-script=“/log warning message="default gateway up"”
Do that at both ends of course, only one modem (or cable) may be broken.
Check your levels of SNR Margin and Attenuation on your Technicolor router. Is super common that the connection drops everytime for poor level values. Check the values/speed relationship on a VDSL table (search it on Google), and compare with your results. Probably, the problem is your connection with your ISP and not your equipment.
Regards.