WAN aggregation between A20 (AC4000) and Arris SB8200 doesn't work
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Information for the Arris SB8200:
| Hardware Version | 7 |
| Software Version | AB01.02.053.05_051921_193.0A.NSH |
WAN aggregation, i.e. advanced -> network -> internet -> wan aggregation between an A20 and an Arris SB8200 does not work.
1) CAT5E connected between A20 WAN and SB8200 port 1
2) CAT5E connected between A20 LAN1 and SB8200 port 2
3) WAN aggregation enabled on A20 and link aggregation enabled on SB8200 (under advanced menu).
4) Rebooted both devices at least twice in this state.
CAT5E testing:
1) Is the cable going between WAN and PORT1 good? Yes this is the cable i've been using forever in a normal configuration, able to get 500 - 600mbps download. No packet loss on pings for many minutes.
2) Is the cable going between LAN1 and PORT 2 good? Yes I tested this cable between a laptop and the A20 in non WAN aggregation configuration mode, it came up connected at 1000mbps, pings/internet connectivity all ok.
WAN Link aggregation (LACP testing):
1) Data activity light on SB8200 PORT 2 never blinks. The Link light is on but the data activity light never blinks like it does for PORT 1.
2) If WAN<->PORT1 connected and LAN1<->PORT2 disconnected everything still works ok.
3) If WAN<->PORT1 disconnected and LAN1<->PORT2 connected A20 loses internet connectivity, globe light goes orange or turns off.
I was mislead by the device specifications, sorry about that.
You should have WAN aggregation option indeed - it is described in your A20 user guide - Chapter 4.5.
Now the issue that you may have to set up the WAN aggregation could be a mismatch of the LAGG type.
On many occasions TP-Link states that they support only static link aggregation - check this thread for details.
I don't see any additional setting in A20 regarding LAGG configuration though.
Here's a screenshot from the Arris SB8200 LAGG Setup guide:
It looks similar to A20's web management interface (i.e. no additional settings except enabling LAGG).
If following these instructions LAGG doesn't work I think you won't be able to set it up successfully.