Hi,
The configuration you see is global configuration across all APs in the same cluster. Because the cluster could have a mixture of 11n and 11ac APs, or could have 11ac APs added in the future, our global configuration UI include the full set of configuration options, including 80mhz support which is 11ac only. When this configuration is applied to individual APs, it would only take effect on 11ac APs; the 11n AP would just ignore this setting.
Thanks,
Yan Liu
Product Manager
Aruba Instant
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