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What is a good troubleshooting practice for a VLAN interface on a Switch that is in "down/down" or "up/down" state? (Choose two)
Ensure that the VLAN exists and is active.
Make sure that the VLAN interface exists and is not administratively shut down.
Check that the encapsulation is not mismatched with the peer end.
Confirm that the interface is configured with auto-negotiation mode.
Verify that the VLAN interface has an IP address configured.
The VLAN interfaces are used in the Switch for management purposes and can use a Layer 3 address. A VLAN interface is up/up if the VLAN is active and the interface is not shut down. VLAN interfaces do not use encapsulation. The VLAN interface does not depend on the IP to be on the up/up state.
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