Question : Problem: Unusual Traffic Shape = Intermittnet VPN Connectivity

I own a small company doing database hosting for a very specific market. These customers connect to my servers via standard MS networking PPTP tunnels to a couple of MS RRAS servers. I started having connectivity issues a month or so ago and now my customers regularly see their tunnels disconnect.

My ISP seems baffled and feel that possibly the modem is having a problem with packets per second (PPS) though my avg. PPS is within the specs of the Ambit modem. They have given me a second connection and modem in attempts of load-balancing my traffic. What I find strange is the pattern I see in a through-put graph. Please see attached...

Can anyone explain this pattern please?

Answer : Problem: Unusual Traffic Shape = Intermittnet VPN Connectivity

Sorry, this appears to be a DOCCIS standard (IP over Broadband) issue...

Thanks anyway!

Please close out this question.