Orbi Pro SRS60 - manufacturer shown as "OCOSMOS" ?

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Short answer,  there is no harm for your network. as these BSSID mac address are valid only locally.

You do not need to unplug it from your network.

But if you interested to know more, here are the details.

There are few ways to support multiple BSSID in Access points.

Why virtual mac address are needed :

When there are many APs or Satellites  in an ESS (extended service set) may advertise the same SSID, the BSSID serves as a unique identifier for clients to know which AP they are associated with. The BSSID will be seen in wireless packet captures and as the MAC address a client is associated to.

Method 1)

In Orbi pro,  to support same SSID across multiple radios, we use generated local value of BSSID.

Each Radio has one base mac address assigned by factory. The software in order to support 4 SSID (Wireless1/2/3/Guest),  genrate dynamic Local Administration bit enabled bit to derive mac address (LAA MAC).

Please read more details

https://en.wikipedia.org/wiki/MAC_address#Universal_vs._local

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This may confuses scanner , if the scanner that does not consider the LAA bit in mac.  Ideally when L/U bit is set in mac address, the OUI look up may not make sense.

Method 2)

While in our  WAC500/WAX600 series we reserve more mac address per radios and uses a different LAA mac generation method that will keep the OUI intact.