Why is my SVI down down?
SVI is created by using the “interface VLAN [VLAN NUMBER]” command. Following are most common cases when troubleshooting SVI in up/down state: Make sure that the VLAN this SVI represents exists in the VLAN database. So, if you are creating an SVI for vlan 10, make sure that you have already created that VLAN.
Why would a VLAN interface be down?
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.
What interface is SVI?
switch virtual interface
A switch virtual interface (SVI) represents a logical layer-3 interface on a switch. VLANs divide broadcast domains in a LAN environment.
Is SVI and VLAN the same?
A virtual LAN or VLAN is any broadcast domain that is segregated and isolated at the data link layer OSI layer 2. An SVI is virtual and has no physical port defined and performs the same functions for the VLAN as a router interface. SVI is also called Interface VLAN.
What does it mean when line protocol is down?
The line protocol being down indicates a clocking or framing problem. Probable reasons for this are encapsulation and clock rate mismatches. Ethernet0 is administratively down, line protocol is down: This output indicates that a local interface has been manually shut down using the shutdown command.
Is down line protocol is down?
How do I bring up a VLAN interface?
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.
Is SVI a VLAN 1?
By default, an SVI is created for the default VLAN (VLAN1) to permit remote switch administration. An Switch Virtual Interface cannot be activated unless associated with a physical port. SVIs are the most common method of configuring inter-VLAN routing.
How do I find my SVI IP address?
After the enable command is issued, the show running-configuration command or the show ip interfaces brief command will display the IP address of the switch virtual interface (SVI).
What is the purpose of the SVI?
A Switched Virtual Interface (SVI) is routed interface in IOS representing the IP addressing space for particular VLAN connected to this interface. There is no physical interface for the VLAN and the SVI provides the Layer 3 processing for packets from all switch ports associated with the VLAN.
What does interface Down Down mean?
If the line shows up down then we believe that we have physical connectivity but no ability to transmit and receive on the interface. And if the interface shows up up then we have physical connectivity and the ability to transmit and receive on the interface. So down down indicates a problem with the connection.