What does Switchport trunk encapsulation DOT1Q mean?
switchport trunk encapsulation dot1q sets the encapsulation mode of the trunk interface to the industry standard 802.1Q. switchport trunk encapsulation isl sets the encapsulation mode of the trunk interface to proprietary ISL.
What are the two types of encapsulation for trunks?
There are two trunking protocols: 802.1Q: This is the most common trunking protocol. It’s a standard and supported by many vendors. ISL: This is the Cisco trunking protocol.
What is dot1q Cisco?
802.1q (also known as dot1q) is an IEEE industry standard trunking protocol. Cisco switches supports both ISL (Inter Switch Link – Cisco propietory) and 802.1q.
What is encapsulation in Cisco?
Data Encapsulation. When a host transmits data across a network to another device, the data goes through encapsulation: It is wrapped with protocol information at each layer of the OSI model. Each layer communicates only with its peer layer on the receiving device.
How do you implement encapsulation?
How to implement encapsulation in java: 1) Make the instance variables private so that they cannot be accessed directly from outside the class. You can only set and get values of these variables through the methods of the class. 2) Have getter and setter methods in the class to set and get the values of the fields.
Is there a switchport trunk encapsulation Dot1q command on Cat 2950?
The 2950 only supports 802.1q trunking so there is no need for the encapsulation command so it is not available. Re: “switchport trunk encapsulation dot1q” command on cat 2950. The 2950 only supports 802.1q trunking so there is no need for the encapsulation command so it is not available.
Do I need the switchport trunk encapsulation command?
A simple rule is: if the switchport trunk encapsulationcommand is not available then you don’t need it This is what I and Jon are trying to tell you all the time. Your switch in this case supports only 802.1Q which is exactly the same encapsulation as used by the other switches, so your trunk should work just fine.
How do I set up Dot1q encapsulation on a router?
Routers only support Dot1Q encapsulation. Now we configure the router’s Fa0/1 interface to act as a trunk. First, we remove the ip address on the physical interface. Next, we configure a subinterface for each VLAN the link will be a trunk for. The interface number can be anything you want.
Why can’t I choose between ISL and Dot1q encapsulation?
The reason you don’t get a choice is probably because the switch only supports dot1q encapsulation so there is no choice to be made. You would only get a choice if the switch supported both ISL and dot1q. Jon 0 Helpful Reply tuhinbhowmick Beginner In response to Jon Marshall Mark as New Bookmark Subscribe Mute Subscribe to RSS Feed Permalink