What is subinterface in Cisco router?

What is subinterface in Cisco router?

A subinterface is a virtual interface created by dividing one physical interface into multiple logical interfaces. A sub-interface in a Cisco Router uses the parent physical interface for sending and receiving data. A Subinterface can be configured just like a physical interface.

How do I add a subinterface to my Cisco router?

Creating a VLAN Major Interface

1. Specify a Fast Ethernet, Gigabit Ethernet, or 10-Gigabit Ethernet port. host1(config)#interface fastEthernet 4/0.
2. Specify VLAN as the encapsulation method. host1(config-if)#encapsulation vlan. The router creates the VLAN major interface.

Why do you need subinterfaces?

One of the uses of subinterfaces is to provide unique Layer 3 interfaces to each VLAN that is supported by the parent interface. In this scenario, the parent interface connects to a Layer 2 trunking port on another device.

How many subinterfaces do we need per VLAN?

You can partition one physical interface into up to 4094 different subinterfaces, one for each VLAN. We recommend that you use the VLAN ID as the subinterface number when you configure the subinterface.

What is router on a stick used for?

ROUTER-ON-A-STICK, also known as a “one-armed router” is a method for running multiple VLANs over a single connection in order to provide inter-VLAN routing without the need of a Layer 3 switch. Essentially the router connects to a core switch with a single interface and acts as the relay point between networks.

Can we create VLAN in router?

You can configure the software to allow traffic on a VLAN to be treated as if the VLAN were a router port. A port can be either a VLAN port or a router port, but not both. However, a VLAN port may be part of a VLAN that is itself a router port. Section , Configuring VLAN Routing via Web Interface.

What is a VLAN subinterface?

A dot1q VLAN subinterface is a virtual Cisco IOS interface that is associated with a VLAN ID on a routed physical interface. A parent interface is a physical port. Subinterfaces can be created only on Layer 3 physical interfaces.

How do I setup a Cisco router?

Connect your computer to your router either via Wi-Fi or an Ethernet cable. Open a new Web browser tab, input the following IP address into the address bar and press Enter: Log in to your administration panel using your Cisco router’s administrative user name and password.

How do you Access Cisco router?

To access Cisco router with CCP following steps are required. Connect to your router using console and configure it for Telnet and SSH. Configure SSH and Telnet for local login and privilege level 15. Enable the router’s HTTP or HTTPS server. Create a user with privilege level 15. Discover the router with CCP.

What is Cisco sub interface?

A subinterface is a virtual interface created by dividing one physical interface into multiple logical interfaces. A sub-interface in a Cisco Router uses the parent physical interface for sending and receiving data.