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CM1150v with xfinity dropps speeds soon after a reboot
I have cm1150v modem with xfinity 1Gb service.Firmware version is set by comcast, v2.02.04. I'm using 2 LAN port aggregation to RAX80 wifi router, they are both located near eachother. I measure...
Hey,thats an idea! i might as well try that. Cheers!
I am having a similar problem with a refurbished CM1150V and a new RAX120 router. I haven’t isolated the slow down to the modem, but others have seen ping times soar, packet loss surge, and throughput drop enough to get kicked from games.
I am using LA as well. There is also a security appliance in the setup, but it is a year old and has never behaved this way, despite numerous firmware updates. But LA is new for all.
Today, I powered cycled all the networking equipment and speed came right back. I have yet to confirm the problem is the modem.
I am using LA as well. There is also a security appliance in the setup, but it is a year old and has never behaved this way, despite numerous firmware updates. But LA is new for all.
Today, I powered cycled all the networking equipment and speed came right back. I have yet to confirm the problem is the modem.
Power cycling *JUST* the CM1150V brings our speeds back up again. I did a power cycle last night, and then when it was slow first thing in the morning, I power cycled the modem again. Three hours later, speeds are at a crawl, and power cycling the modem only brought them back.
So, I am now convinced this "leak" involves the modem. But, I can only conclude the CM1150V is necessary to have the problem, not sure it is sufficient.
The RAX120 has QoS settings, which I presume means the whole system is now handling packets with QoS stuff written into them. I had added a custom QoS rule for the MAC ID of a 10Gbps adapter that one of the client computers have. I just got rid of that, but it looks like the RAX120 has other QoS rules it comes pre-configured with. It would be GREAT to be able to DISABLE these QoS rules, but it looks like my only option is to DELETE them, and Factory Reset later if I want to get them back. Could the QoS remnants be confusing the modem?
And of course, the other new element is the Link Aggregation. Seems to work fine between the firewall appliance and the RAX120, but maybe the CM1150V is "leaking" speed because of it?
The other variable of course, if Xfinity. Maybe they have a bug in their DOCSIS 3.1 implementation, or maybe they just preference packets from their own rented hardware at collision time. I kind of discount the latter because the internet is zippy every time the modem is reset, and it just gets slow hours later, instead of being slow all the time.
It really seems to be characteristic of a "leak"; that is, a slow, accumulating degradation over time.
I have filed a support ticket on this. I think NG has known about this issue for about a year.
Link Aggregation causes this creep. The workaround is to disable Link Aggregation and just use one port.
In my case, I purchased this modem BECAUSE it was DOCSIS 3.1 and had Link Aggregation. If I can get DOCSIS 3.1 another way, I don't need this modem if LA doesn't function.
sad