I know this is supposed to be a "pro" forum, but I'm hoping someone can help since my ISP isn't doing much to try and fix things.

My ISP has given me a DSL modem / Router combo - a ADB / Pirelli P.DG A2100N and I have a 4096 / 767 kbps connection. I use it purely as modem and router, and have the wireless AP feature turned off. I run it to a Ubiquiti Networks Toughswitch and use a Ubiquiti UAP as the wireless access point - although I've ran tests directly wired to the router with nothing else connected, and still see the same issues.

I've been having issues where latency suddenly spikes from 8ms to google.com to 250+ if someone does anything on the internet. If I run a speedtest or something, I can see latencies above 3000ms. Regularly when downloading something, even if the speed is throttled to , it can get random drops to 0kbps every few seconds.

Online gaming is impossible because I notice the sudden lag-outs in the connection, and video streams or VoIP drop out as well - it's not at all consistent.

I managed to find the password to my modem and I don't think I see anything wrong with the settings - but I looked for the logs and found this:

Jun 6 17:10:30  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:10:30  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:10:31  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:10:40  user    warn    kernel: __ratelimit: 63 callbacks suppressed  
Jun 6 17:10:40  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:10:40  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:10:40  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:10:40  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:10:40  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:10:40  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:22  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:23  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:24  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:24  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:24  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:24  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:24  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:25  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:25  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:25  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:29  user    warn    kernel: __ratelimit: 15 callbacks suppressed  
Jun 6 17:11:29  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:29  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:30  user    warn    kernel: nf_conntrack: table full, dropping packet.  
Jun 6 17:11:30  user    warn    kernel: nf_conntrack: table full, dropping packet.
Jun 6 17:55:26  user    warn    kernel: bcmxtmcfg: OAM loopback response not received on VCC 1.1.3
Jun 6 17:55:27  user    warn    kernel: bcmxtmcfg: OAM loopback response not received on VCC 1.1.4       

So, as I understand it, it appears the router is dropping packets?

If that's the case, is there anything in the config that I can change? Or should I buy a new router, a new modem, or both?