Contributing

Can we Config sub interface on router?

Can we Config sub interface on router?

A Subinterface can be configured just like a physical interface. If you take the help from Cisco IOS using question mark, we can see the number range which be can used to create subinterfaces. To create a subinterface and configure it with an IP address, use the following commands.

How do I add a subinterface to my router?

To configure additional IP interfaces over the VLAN major interface:

  1. Create a new VLAN subinterface by adding a unique subinterface number to the interface identification command. host1(config-if)#interface fastEthernet 4/1.2.
  2. Assign a VLAN ID for the subinterface.
  3. Assign an IP address and mask.

What is a sub interface Cisco?

A dot1q VLAN subinterface is a virtual Cisco IOS interface that is associated with a VLAN ID on a routed physical interface. Subinterfaces divide the parent interface into two or more virtual interfaces on which you can assign unique Layer 3 parameters such as IP addresses and dynamic routing protocols.

How do I create a subinterface on my Cisco router?

To create a VLAN subinterface, use the interface command in XR Config mode. To delete a subinterface, use the no form of this command. Physical interface or virtual interface followed by the subinterface path ID.

What is loopback interface in router?

A loopback interface is a logical, virtual interface in a Cisco Router. A loopback interface is always up and allows Border Gateway Protocol (BGP) neighborship between two routers to stay up even if one of the outbound physical interface connected between the routers is down.

What is encapsulation dot1q command?

The switchport trunk encapsulation dot1q command tells the switch that the interface should use IEEE 802.1Q encapsulation on the frames when the interface is configured as a trunk. Basically 802.1Q inserts a VLAN tag on the frames. This contrasts with ISL that actually encapsulates the frames with an ISL frame.

How do I configure my router on a stick?

How to: How-to Configure Router on a Stick

  1. Step 1: Overview of the Network.
  2. Step 2: Physicaly connect all your devices.
  3. Step 3: Configure IP addresses on the PC and Server.
  4. Step 4: Configure the VLANs on the switch.
  5. Step 5: Apply switch interface to VLAN and set to access.

What is a physical interface?

Physical interfaces consist of a software driver and a connector into which you connect network media, such as an Ethernet cable. Physical interfaces can be grouped for administrative or availability purposes.

Why do we use encapsulation DOT1Q?

As 802.1q encapsulation inserts an additional field into the Ethernet frame, Frame Check Sequence(FCS) is recalculated. All switches support 802.1q encapsulation. VLAN implementations have shown an increase in the performance, scalability and security of the entire network.

How are subinterfaces created in a Cisco router?

If we have one Router with one physical interface, but needed to have the router connected to two IP networks to route traffic between two routers, we can create two sub interfaces within the physical interface, assign each sub interface an IP address within each subnet and then route the data between two subnets.

How to configure sub-interface or router on a stick?

06-09-2015 02:02 PM Sub-interfaces can only be configured on layer-3 interfaces and not layer-2. 06-10-2015 02:56 PM 06-10-2015 02:56 PM I was told configuring Switch Virtual Interface – SVI can achieve the same result as router on a stick?

Can a sub-interface be configured on Layer 2?

Sub-interfaces can only be configured on layer-3 interfaces and not layer-2. 06-10-2015 02:56 PM 06-10-2015 02:56 PM I was told configuring Switch Virtual Interface – SVI can achieve the same result as router on a stick?

How to create a subinterface with an IP address?

To create a subinterface and configure it with an IP address, use the following commands. To bring the physical interface from Administrativly down state to up, first go to the physical interface and issue “no shutdown” command as shown below. omnisecu.com.R1>enable omnisecu.com.R1#configure terminal Enter configuration commands, one per line.