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CM3000 on Xfinity with 1200Mbit, onlt getting around 940Mbit with link aggregation
I just purchased a CM3000 for use with my Xfinity 1200mbit plan. It's currently running firmware 6.01.04. It was set up in link aggregation mode and connected to my router via ethernet ports 1 and 2....
The Ookla speedtest, both app and in-browser is multi-connection, so shouldn't this be multiple data flows? I've seen other's Ookla results with link aggregation and it's well over 1000Mbit, so is there something wrong or is the Ookla speedtest not truly multi-connection?
It depends on the load balancing algorithm used by LACP. Layer 3+4 might separate out the connections, layer 2 would not. I don't know what the CM3000 does, but generally devices that support layer 3+4 let you configure the load balancing. Devices that don't let you configure it are using layer 2.
Another factor (specific to speed tests) is that they aren't directly measuring throughput. They are looking at packet delivery timing.
You could try (briefly) hooking the Mac up directly to the CM3000 and testing that.
What router do you have?
It's a Cisco 8200 router, but the load balancing is not set up with either the LAN or WAN port-channel interfaces which explains why I'm seeing throughput of the ethernet interface, probably as one data flow.
I'd get with Cisco to see if they can help you with the switch and load balancing on there switch/router.
Good luck.
