Contents
- 1 What is Switchport mode dynamic desirable?
- 2 What is the difference between Switchport mode dynamic auto and dynamic desirable?
- 3 What are three techniques for mitigating VLAN attacks?
- 4 What’s the difference between switchport mode and dynamic auto?
- 5 How to disable DTP negotiation in switchport?
- 6 How is trunk negotiation managed in dynamic trunking protocol?
What is Switchport mode dynamic desirable?
switchport mode dynamic desirable: Makes the interface actively attempt to convert the link to a trunk link. The interface becomes a trunk interface if the neighboring interface is set to trunk, desirable, or auto mode. You can use this command only when the interface switchport mode is access or trunk.
What is the difference between Switchport mode dynamic auto and dynamic desirable?
Dynamic Auto — Makes the Ethernet port willing to convert the link to a trunk link. The port becomes a trunk port if the neighboring port is set to trunk or dynamic desirable mode. This is the default mode for some switchports. Dynamic Desirable — Makes the port actively attempt to convert the link to a trunk link.
What can be manually specified on a trunk port or dynamically negotiated using Cisco proprietary Dynamic Trunking Protocol?
By default, all switch ports are access ports therefore to make a port trunk, user should manually make it trunk by using DTP .
- Dynamic Trunking Protocol –
- switchport mode access (DTP mode OFF) –
- switchport mode trunk (DTP mode ON) –
- switchport mode dynamic auto –
- switchport mode dynamic desirable –
What are three techniques for mitigating VLAN attacks?
Answers Explanation & Hints: Mitigating a VLAN hopping attack can be done by disabling Dynamic Trunking Protocol (DTP), manually setting ports to trunking mode, and by setting the native VLAN of trunk links to VLANs not in use.
What’s the difference between switchport mode and dynamic auto?
‘switchport mode dynamic auto‘ says: “If the other end asks me to be a trunk with DTP, then become a trunk, but I won’t initiate any negotiation from this end. If no one asks me to become a trunk then I will become an access port.” Hi! Best regards! Best regards!
When to use switchport mode or Trunk Mode?
switchport mode dynamic auto: Makes the interface able to convert the link to a trunk link. The interface becomes a trunk interface if the neighboring interface is set to trunk or desirable mode. The default switchport mode for newer Cisco switch Ethernet interfaces is dynamic auto.
How to disable DTP negotiation in switchport?
There are two ways to disable DTP negotiation: 1 Configure the interface for access mode. 2 Use the switchport nonegotiate command on the interface. More
How is trunk negotiation managed in dynamic trunking protocol?
An interface can be set to trunking or nontrunking, or to negotiate trunking with the neighbor interface. Trunk negotiation is managed by the Dynamic Trunking Protocol (DTP), which operates on a point-to-point basis only, between network devices.