What Does the "Auto" Channel Selection Do?

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Auto channel selection will let Cloudtrax optimize channel settings for your network and requires firmware version 565 and above. Auto channel scans occur during your maintenance window and channel adjustments will happen during that time. You'll want to make sure that your maintenance window is during a low traffic time period because channel changes can cause some temporary disconnects for clients. If no changes are required the potential disruption to the network will be minimal -- around 5-10 seconds. If changes are required then the AP will reconfigure, taking the network interfaces down for about ~30 seconds. 

While auto channel is enabled any existing overrides are overridden by auto channel. If auto channel is later disabled, the user’s original channel overrides, if any, will again be used.

The automatic channel feature will use channels that are as uniform as possible, avoid channels which are used by other APs, minimize the number of hops in the mesh, maximize client throughput, ensure better connections between nodes, and avoid orphaned mesh nodes.

For Gateways:

From our scan results, we create a graph of possible mesh connections and assign channels to gateways by trying to avoid external interference (APs, spectrum scan results). We then assign channels for gateways with the smallest amount of channel alternatives and/or the most interference nearby. If a gateway is a dual-band device, we assign channels independently for each band as per the goals above.

For Repeaters:

All repeater nodes get a channel assigned and we compute scores for all possible edges. A "possible edge" is between an unassigned node and an assigned node. Our scoring takes into account: outside interference, link quality, and capacity of the assigned node. We then assign a channel to the node with the best scored possible edge. if the repeater is a dual-band device, we treat the second band as if it's a gateway and assign channels independently just the same.

Note: All APs in the network need to be online and consistently checking into Cloudtrax for Auto-channel to run.

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Comments

  • Avatar
    John L

    Thank you for this informative article on how your "Auto" Channel Selection works Bryan.

    Without this feature I have to study the site survey results and nearby AP frequencies and then guess the optimal channel selection for each AP and gateway.

    The way your auto feature reads, it will do this for me and do a far better job too. I will test it over the next month. Thank you again.

  • Avatar
    Calebe Nobre

    Is there a way for support to push a channel update? I want to change the channel config to Auto but I can't wait until midnight to see if they will work or not (it is a production network)

  • Avatar
    Erik P.

    Calebe: We're working on adding the ability to "immediately" run.

  • Avatar
    Dinh Van Nghia

    I think that cloudtrax should both "Auto" and "Manual" in same time, it's mean when network is configed "Auto", allow admin config "Manual" some node if erea has many interference signal

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