Issue with unstable PPP interfaces

Hi,

I have two PPPoE client interfaces with two WAN links (DSL + Wireless bridge).
The issue I am experiencing is about both links becoming very unstable after a while, and RTT delay fluctuates a lot creating a lot of issues especially with Voice calls because of jitter.
Magically if I disable and re-enable the PPPoE interfaces, it goes back to be very stable and consistent for a while, until the next round of fluctuations.
When I speak to both the ISPs they look at their side of the network (like DSL SNR, etc) and always states they see no problem and point their fingers at the home router.

Anyone has a clue if this could really be a router issue?

PS I have a RB 2011UiAS with the latest RC code.

Hi

bumping up this question again as the issue is still there. Any idea how I could further investigate this problem?

Every couple of days I have to disable/enable the PPPoE interfaces to bring the connections back to decent quality.

Layer1 links (DSL and PtP as they use separate modems)are not touched but the performances returns to normal when PPPoE is refreshed. It all seems to be a PPPoE client issue.

thanks