We can get additional switch-port in the same router but we can't see the function in this router. Can you please confirm that the switch port must function like the catalyst 2960 switch. We want to allow only the specific mac address from the switch port, so, We are looking for the mac access-list concept in this router.
Looks like you want to implement port-security on the integrated switch. This should be possible.
Please click here for more information on Cisco 860 and 880 Series Integrated Services Routers. It should be ok for the 880 series and 892 series.
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