LAGG on WAN Incoming Data Issues

[Trinnik]

Hello!

Comcast recently upgraded my internet service to 1.2Gb and I have attempted to configure LAGG via LACP to my MB8600 modem. I have successfully gotten this working and do in fact see the full 1.2Gb in a speedtest from the router! All outbound traffic seems to be functioning normally, no issues there. However, inbound traffic from the WAN side, such as trying to reach a web server I host, always times out on the client. I don't see any errors or collisions on the LAGG interface. When doing a packet capture I see a ton of TCP Retransmission packets coming from the client back into the router. What happens is, in this case my phone on data gets all of the packets out of order and sends a request for TCP Retransmission but continues getting the data out of order until it times out. This does not happen when I have the WAN as only one interface so I believe it is directly related to the LAGG splitting packets between the interfaces.

What would I go about doing to troubleshoot this issue? Is it even possible to fix this issue? I am worried that this might be an issue with the modem's implementation of LAGG, which obviously makes this only fixable by Motorola. At least then I could know it's not me! I fear my only solution would be to upgrade my equipment to faster interfaces and forget aggregation altogether.

Thanks for your help!

[LOTRouter]

I had the same issue and I finally gave up and just live with a single 1G connection.

[Dantichrist]

Have you guys been figure anything out to resolve this?

I'm having the same issue. It's with a Netgear CM1200 modem so it may not be the modem since the OP has a Motorola.