What is interface VLAN on switch?
A VLAN Interface is a virtual interface that is attached to the physical network port or bond that your VLAN is configured on. The VLAN Interface is used to automatically tag traffic that is routed through it with the appropriate VLAN ID.
How do I create an interface VLAN?
How-to Bring Up a VLAN Interface Assigned to a LAN Ethernet Port That Has an Up/down Status
- The VLAN must exist and be active in the VLAN database.
- At least one switched port in the VLAN (access or trunk) must be up.
- That port must be in the STP forwarding state.
What is interface VLAN routing?
Inter-VLAN routing refers to the movement of packets across the network between hosts in different network segments. VLANs make it easier for one to segment a network, which in turn improves the performance of the network and makes it more flexible, since they are logical connections.
What is the difference between interface VLAN and VLAN?
It sounds like what you’re asking is about the concept of switched virtual interfaces – “interface vlan 10”, for instance, is a switched virtual interface. This is different than a VLAN in that a VLAN is a logical network segment, a broadcast domain, whereas an SVI is a logical interface.
How do I make my VLAN interface always up?
For the Vlan interface to stay up/up either any device should be connected to it ot trunk has to be UP. when trunk goes down and there are not other device in the particular vlan, the interface will go down.
How do I configure a VLAN on a Cisco router?
To access config-vlan mode, enter the vlan global configuration command with a VLAN ID. Enter a new VLAN ID to create a VLAN, or enter an existing VLAN ID to modify that VLAN. You can use the default VLAN configuration (Table 12-2) or enter multiple commands to configure the VLAN.
Can you put VLANs on a router?
You will need to choose which devices to use to implement your VLAN and the VLAN mode to use. VLANs are supported on routers (not all) and on network switches. On routers the VLANS have different IP subnets.
What are the 3 different types of inter-VLAN routing methods?
There are three inter-VLAN routing options:
- Legacy Inter-VLAN routing: This is a legacy solution.
- Router-on-a-Stick: This is an acceptable solution for a small- to medium-sized network.
- Layer 3 switch using switched virtual interfaces (SVIs): This is the most scalable solution for medium to large organizations.
What is VLAN interface IP address?
Same thing, the VLANs IP address is a Switch Virtual Interface (commonly called a SVI), in essense it is an interface (albeit logical) and plays the same role as a routers interface which has an IP address. It provides a gateway for inter-VLAN or inter-routing traffic.
Why you should not use VLAN 1?
If we leave the default native VLAN as 1, then a malicious developer could exploit this to gain access to another segment. This is accomplished by using a software package to double-tag an Ethernet packet with two separate VLAN ID headers.
Why is VLAN interface down?
Administratively DOWN—The interface has been shut down by using the shutdown command. DOWN—The interface is administratively up, but its physical state is down. The VLAN of this VLAN interface does not contain any physical ports in up state. The ports might not be connected correctly or the links might have failed.
Why is VLAN interface up down?
The VLAN interfaces have to fulfill these general conditions to be up/up: The VLAN exists and is in active status on the switch VLAN database. The VLAN interface exists on the switch and is not administratively down. At least one Layer 2 (L2) (access port or trunk) port exists and has a link up on this VLAN.
How do I see VLAN on Cisco router?
To display VLAN information on a switch, use the show vlan command in privileged EXEC mode. To display the administrative and operational status of a switching (nonrouting) port, use the show interfaces switchport command in user EXEC or privileged EXEC mode.
How do I setup a VLAN on a Cisco router?
What is VLAN 10 on a Cisco 2950 switch?
In the 2950 switch, the FastEthernet 0/6 port has configured VLAN 10 for voice VLAN with dot1p to use IEEE 802.1p priority tagging for voice traffic, and configured trust mode for data traffic from the PC which is connected to the access port of the Cisco IP phone.
What network setup does the catalyst 2950 switch use?
This document uses this network setup: This diagram is an example of a voice VLAN configuration on a Cisco Catalyst 2950 Switch. The switch ports FastEthernet 0/6 and 0/8 are connected with a Cisco IP phone, and the access port on both the IP phones is connected to the PC.
What is the Cisco Voice VLAN feature?
Refer to the Cisco Technical Tips Conventions for more information on document conventions. The voice VLAN feature permits the switch ports to carry voice traffic with Layer 3 IP precedence and Layer 2 class of service (CoS) values from an IP phone.
How can I use two VLANs for one IP phone?
You can configure the switch port, which is connected with an IP phone, to use one VLAN for voice traffic and another VLAN for data traffic from a device attached to the access port of the IP phone.