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WAN Aggregation 802.3AD protocol and XFinity
It seems that Xfinity is getting worse by the month. [EDIT: Inflammatory]
Here's a closed post form years ago.
None (supposedly) at Xfinity knows what Wan Aggregation is... (conveniently)
"Smells" more like a lawsuit for false advertisement happened and that's their solution.
My drive for this is because of the FALSE Advertisement of 1.2Gb down. (Will post on a different topic for that)
Have been trying to get more than 930GB down, by aiming for successful WAN Aggregation.
(I could have sworn speed were closer to whats advertised in past, MAYBE something changed for worse during the "To enhance your experience" [EDIT: Language] (No internet for full days- (Work from home))- That's a seperate post.
So using latest firmware on Asus RT-AX88U , Latest xfinity modem (Technicolor Model:CGM4981COM ), even using Cat 8 quality short cables (2) from Modem to router (Wan & port 4).
Tech came out and upgrade COAX lower gauge, (low DB loss from D-Mark). Everything disconnected from Router. Just one CAT 8 quality cable from router to PC.
Only goes up to 944Gb down & 33up (even using Xfinity's speed test) trying to use WAN Aggregation.
Also, tested using my NEW ARRIS Surfboard S33-RB (https://www.amazon.com/dp/B09VTJR48F?psc=1&ref=ppx_yo2ov_dt_b_product_details )
Common sense would say, they don't support WAN Aggregation. Could never get a clear answer.
Central Colorado Springs area. (Denver 2hrs away, has big backbone pipes.)
("I had a Dream" , someday competition would come back to USA and Options along with it.)
Opinions / Response ?
CCRobert
Official Employee
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455 Messages
2 years ago
Hello @user_2b5cdf I have been researching your question. I have the Xfinity XB8 modem, I can tell you that WAN Aggregation is not supported by our modem. WAN Aggregation is available if your modem supports it. Unfortunately, the ARRIS SURFboard S33 doesn't support WAN Link Aggregation. Specifically, you can't use both of its network ports to deliver a 2Gbps connection. The Asus RT-AX88U that you have features Dual-WAN and Link Aggregation (both LAN and WAN), but it has no multi-gig ports. For that, you'll need to use the SB8200
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zandor60657
Contributor
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204 Messages
2 years ago
Short version: Just say no to link aggregation if you want full speed to one computer. To get full speed on a single connection reliably you need 2.5Gb or faster ethernet from the modem to the computer. High end WiFi could work but it's dodgy. Link aggregation is for multiple machines.
You won't get more than 9xx using 1Gb ethernet on a single connection even with link aggregation. The "rule of thumb" is 950. So one download won't go over that, nor will a speed test unless it's implemented to use multiple TCP streams and your network gear spreads them over multiple ethernet links. Many don't. A common way of doing link aggregation is to spread connections out based on IP address or MAC address. That strategy works reasonably well for business users, which are the main users of link aggregation. 2Gb Internet connection shared by 20 people in an office and the goal is to spread the bandwidth fairly, not allow one computer to download at 2Gbps. It also works ok for a family where multiple people are using the Internet at once. If that's what your gear is doing you'll need 2 machines downloading at the same time to get 1.2Gb, but that's not guaranteed as your gear might not do load balancing and just route packets based on IP or MAC address, etc. The Asus RT-AX88U only has 1Gb ethernet ports, so it will never do >1Gb on a single tcp stream. Also it only supports WAN aggregation, not LAN aggregation, so you'll only be able to go faster than 1Gb to a WiFi client and that requires nearly ideal conditions, multiple TCP connections, and an algorithm that doesn't balance them based on IP or MAC address.
That new Arris Surfboard should be able to manage full speed to a single PC if the PC is wired to the Arris Surfboard using 2.5Gb ethernet. It doesn't have to be directly cabled as long as any switches in between are 2.5Gb or faster. Again, WiFi could work but it's dodgy. Interference from neighbors can wreck it, etc.
I get about 1420/40 on a 1200/35 plan, but I'm using a modem with a 2.5Gb port and a router with a 2.5Gb port connected to the modem and a 10Gb SFP+ cage with an MMF transceiver to connect to my core switch. Ok, so that's a bit fancy and all you really need for full speed is either a combo modem/WiFi router or Comcast gateway with a 2.5Gb port or a modem with a 2.5Gb port plus a router with a 2.5Gb WAN port and at least one 2.5Gb LAN port. Past the switch anything with a 2.5Gb+ adapter gets full 1420/40 Internet speed, including my $800 2019 model laptop using a $30 2.5Gb USB adapter since it doesn't have a built-in ethernet port. I'm mostly a desktop user, but I keep a cheap laptop around so I have something portable for trips & stuff. My desktops and home server all have 10Gb ethernet.
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