How do i configure a port security on a cisco switch
How do I secure a port access switch?
To configure port security we need to access the command prompt of switch. Click Switch and click CLI and press Enter Key. Port can be secure from interface mode. Use enable command to move in Privilege Exec mode.
What is the command used to enable port security in switches?
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.
What is port security in Cisco switch?
Overview. The switchport security feature (Port Security) is an important piece of the network switch security puzzle; it provides the ability to limit what addresses will be allowed to send traffic on individual switchports within the switched network.
How does port security work Cisco?
Port Security helps secure the network by preventing unknown devices from forwarding packets. When a link goes down, all dynamically locked addresses are freed. The port security feature offers the following benefits: You can limit the number of MAC addresses on a given port.
How do you show port security?
To check and analyze the port security configuration on switch, user needs to access privilege mode of the command line interface. ‘show port-security address‘ command is executed to check the current port security status.
What are the three configuration options for the Switchport port security command?
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.
Why should port security be enabled on switch trunk ports?
It restricts the allowed MAC addresses or the maximum number of MAC addresses to individual VLANs on a trunk port. Trunk port security enables service providers to block the access from a station with a different MAC address than the ones specified for that VLAN on that trunk port.
How do I configure a port on a switch?
Sometimes switch ports must manually have their duplex mode and speed manually configured.
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Table 2-5 Cisco Switch Auto-MDIX Commands.
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Table 2-5 Cisco Switch Auto-MDIX Commands.
| Enter global configuration mode. | S1# configure terminal |
|---|---|
| Configure the interface to automatically negotiate the duplex mode with the connected device. | S1(config-if)# duplex auto |
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Mar 31, 2014
Which device would you use to configure port security?
What can you do? Configure port security on the switch. You’ve just enabled port security on an interface of a Catalyst 2950 switch. You want to generate an SNMP trap whenever a violation occurs.
Can you assign an IP address to a switch port?
Here are the steps to configure an IP address under VLAN 1: enter the VLAN 1 configuration mode with the interface vlan 1 global configuration command. assign an IP address with the ip address IP_ADDRESS SUBNET_MASK interface subcommand. enable the VLAN 1 interface with the no shutdown interface subcommand.
How do I assign a port to a VLAN on a Cisco switch?
Why would a network administrator configure port security on a switch?
A network administrator would configure port security on the switch in order to prevent unauthorized hosts from accessing the LAN. This is the main reason why port security is being used in the switch. The feature is used to restrict input to an interface with the help of limiting and.
What are the port security violation modes?
You can configure the port for one of three violation modes: protect, restrict, or shutdown.
How do I assign a port to a VLAN?
Assigning Access Ports to VLANs
- Choose Switch configuration.
- Choose VLAN Menu…
- Choose VLAN Port Assignment.
- Choose Edit.
- Find the port to assign.
- Press space on Default VLAN until it shows No.
- Move over to the column for the VLAN to which this port will be assigned.
- Press space until it shows Untagged.
How do I configure multiple VLANs on one port?
How do I configure an access VLAN?
The process to configure a Layer 2 interface as an access port assigned to a specific VLAN involves 2 steps:
- Step 1: Configure the interface to operate in access mode using the command switchport mode access.
- Step 2: Assign the interface to the desired VLAN using the switchport access vlan command.