Reuse/uniqueness of BSSIDs in 802.11

[Elliott Mitchell]

There is an odd issue which comes up with DBDC cards.  What are 802.11's
requirements for uniqueness/reuse of BSSIDs?

Can a DBDC chip with 2 radios reuse its BSSIDs on each radio?

I would suspect so, though there could be limitations.  I would think it
legal if both radios were on different bands.  Perhaps it would be
required for the BSSID to be paired with the same SSID on each radio.

In a different way you can think of tuples:

<bssid, ssid, chan, band>

Is <bssid0, chan0> sufficiently distinct from <bssid0, chan1>?  Does
this pair require the same SSID for both?

Is <bssid0, band0> sufficiently distinct from <bssid0, band1>?  Does
this pair require the same SSID for both?

The rules for radio/802.11 are different from ethernet.  Issue #995 on
GitHub needs an expert who can speak to the actual rules/limitations.

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