Some applications require that no traffic be forwarded by the Layer 2 protocol between ports on the same switch. In such an environment, there is no exchange of unicast, broadcast, or multicast traffic between ports on the switch, and traffic between ports on the same switch is forwarded through a Layer 3 device such as a router.
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Protected ports can be in the same vlan. In any case if the ports are in different vlans they cannot talk to each other without a Layer-3 device.
Protected ports will restrict sending the unknown unicast,broadcast and multicast traffic to each other. But the traffic originated from the unprotected ports can be flooded to protected ports and you have to use " port block " command to block flooding od excess traffic on the protected ports.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...