What is protected port in switch?

What is protected port in switch?

The protected ports feature is a safety measure that prevents ports from forwarding traffic to each other, even if they are on the same VLAN. Each port is designated as either protected or unprotected. By default, all ports are unprotected.

Which command will enable port-security?

Use the switchport port-security command to enable port-security. I have configured port-security so only one MAC address is allowed. Once the switch sees another MAC address on the interface it will be in violation and something will happen.

How do I enable a port on a Cisco switch?

Steps

1. View the port groups available in a Cisco switch: show port-resources module blade_number.
2. License and acquire the required port in a port group by entering the following commands in sequence: config t interface port_number shut port-license acquire no shut.
3. Save the configuration: copy running-config startup-config.

How do I create a private VLAN on a Cisco switch?

First, you define the port as a promiscuous port and then you configure the mapping between a secondary VLAN and the primary VLAN.

1. Before You Begin. Ensure that the private VLAN feature is enabled.
2. switch# configure terminal.
3. switch(config-if)# switchport private-vlan mapping {primary-vlan-id} {secondary-vlan-list | add.

What are the 3 port security violation modes for a switch?

Switchport Violations On Cisco equipment there are three different main violation types: shutdown, protect, and restrict. These are described in more detail below: Shutdown – When a violation occurs in this mode, the switchport will be taken out of service and placed in the err-disabled state.

How do I enable ports on a switch?

On a PC or smart device

1. Access your router’s settings.
2. Locate the Port Forwarding settings.
3. When asked for an application name, you can enter any word (Nintendo Switch, etc.)
4. Within the port range, enter the starting port and the ending port to forward.
5. Set the protocol as UDP.

Why is port error disabled?

The Errdisable error disable feature was designed to inform the administrator when there is a port problem or error. The reasons a catalyst switch can go into Errdisable mode and shutdown a port are many and include: Duplex Mismatch. Loopback Error.

What is the protected port on a Cisco switch?

The protected port is a feature on Cisco Catalyst Switches that you can use to prevent interfaces from communicating with each other. Let me show you a picture to explain this:

Can a protected port forward to a nonprotected port?

Forwarding behavior between a protected port and a nonprotected port proceeds as usual. Because a switch stack represents a single logical switch, Layer 2 traffic is not forwarded between any protected ports in the switch stack, whether they are on the same or different switches in the stack. The default is to have no protected ports defined.

Can a protected port forward a PIM packet?

Data traffic cannot be forwarded between protected ports at Layer 2; only control traffic, such as PIM packets, is forwarded because these packets are processed by the CPU and forwarded in software. All data traffic passing between protected ports must be forwarded through a Layer 3 device.

What are the features of a protected port?

In such an environment, the use of protected ports ensures that there is no exchange of unicast, broadcast, or multicast traffic between these ports on the switch. Protected ports have these features: A protected port does not forward any traffic (unicast, multicast, or broadcast) to any other port that is also a protected port.