Hi Everyone
I have a RB1100AH that terminates a few PPP connections. There are about 30 or so odd l2tp connections inbound to the RB. It does 3 PPP outbound ADSL connections, it also has an OpenVPN client interface and one EoIP Tunnel.
Every day at random times, all the PPP (l2tp etc even the OpenVPN) interfaces just stops passing traffic. They are still connected but shows 0 bp/s through put.
All static physical interfaces work fine, I can winbox into the router etc.
This started happening on V.6.9. The RB does not log anything when it happens, it just stops routing traffic for PPP interfaces 
Please help me, this is very frustrating.