What does trunking a port mean

I can't remember needed to look on the books on that. Then if you take the theory you learn to pass your exam into the real world - i will say But if the network does and operate what you want it to do - then it's working, right?

You create a design requirement, then implement a configuration based on the design requirements. For new switches I would pick "auto" as the default, for older switches "i would pick Dynamic Desirable". And if you were to follow best practice recommendation.

Assuming the Center switch is a distribution switch but I wouldn't call it that, since it connects end-hosts - then keep the Left and the Right switch in Auto and put the center switch in Trunk. The command " switchport nonegotiate " is required to completely disable DTP on the port.

That is important since that is the best practice implementation of a trunk-port. Always disable DTP, trunk manually. But that is just the general best practice. I've seen networks that uses DTP to help field engineers deploy access-switches easily. So then the field engineers would just have to deploy a switch in the rack, connect a cable that links to the distribution layer switch and it would automagically become a trunk and allow all the VLANs.

Should they miscable it and connect it to another access-switch, hopefully other security mechanisms protects against that but it would not form a trunk where it's not supposed to trunk. Like access-switch to access-switch, access-switch to servers, access-switch to end-hosts etc.

Best practices are more if you want to learn how it's the best and recommended way of implementing things - there will always be deviations from those. Appreciate your input. I will be starting icnd2 study and probably will learn those dtp more as I go through my journey to ccna. It sucks our barnes and noble does not have it stock so I will have to order it online oh well I will just wait.

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The Cisco Learning Network. View This Post. Edited by Admin February 16, at AM. Understanding Trunk Port. I'm having some problems to understand Trunk Port. I created a topology: Router1 has three Subinterfaces, encapsulated with dot1Q. Best Regards, Thiago. PC 8 - Hi Thiago, Chuck is already helping you with your questions so i don't want to budge in.

Those are the implementation requirements. Now about your questions. Short and correct answer: Yes. Otherwise packets More detailed answer and explanation: No. What do you mean by encapsulate? Hi again Thiago, Yeah! I'm glad you got it working.

Although i just put it as a "distribution switch" since it's technically aggregating the traffic from Switch 5 and Switch 7 up towards the router A distribution switch in general attaches to at least one core-switch. You are correct.

There are perfectly valid reasons for it, and the best practice implementation is: Use VTP in Transparent mode Simply put, because of how it works. Or in a router with an ethernet-module. If it's a layer 2 switch that can't do ip-routing of any sort, then you just need this command: switchport mode trunk Since it can't do any routing.

The router uses this command: encapsulation dot1q encapsulation isl -HTH. Hi, Daniel 3 Chuck said: "On those trunk interface you can do and do same to the others as well. When switch 6 distributes the frames out of access ports, they are untagged and can be received by the end points Correct.

Thiago, If the links are in access-vlan 2 and 4 , does traffic not travel tagged? Access-ports deals with untagged frames. Thiago wrote: If one switch receives a tagged packet of some VLAN that it doesn't have, Why does it discard this packet? Thiago wrote: Is necessary to encapsulate a Switch Port?

Assuming you are referring to the below command switchport trunk encapsulation dot1q It is necessary because without it the switch will not know how to package the packet before forwarding it.

Hi chuck, I am still learning so I went ahead and tried re-creating what you have on your topology and having all vlans on your core switch able to pign all host. Remember that if you issue this command: show interfaces trunk It will list that all VLAN's are allowed to cross the trunk.

So sorry about that confusion! Chuck wrote: I just removed vlan 3 and 4 on SWCnt and ping from Hi again Chuck, Correct. Can you figure it out? You are on the right track. What makes a VLAN active? Hi again Chuck, No. That's not a recommended way of doing it. It will work in this topology. Your welcome. Yes your first configuration was the best one. There are always a "best configuration" to use. That said, your first example was the best one. Nobody would have objected against that.

Chuck wrote: Great! That is platform based and IOS-release based. Important note though: -You would still be using DTP on that port. Natural Language Processing.

Techopedia Terms. Connect with us. Sign up. Term of the Day. Best of Techopedia weekly. News and Special Offers occasional. Trunk Port. What Does Trunk Port Mean? Transmission Methods In order to accommodate VLAN trunking, the trunk port routes a data packet that contains a tag in the frame header.

Setups and Structures The versatility of a trunk port and a VLAN trunk can be shown through various data flow charts showing how the VLANs are chained together and use common resources.

Share this Term. Tech moves fast! By Priya Pedamkar. This article will give you the basic knowledge of these two most confusing terms in the cisco world. In very simple words, the trunk of a tree carries water and essential nutrients to all the branches and leaves of a tree. Similarly, the trunk in VLAN especially carries streams of signals to the correct destination or location.

Basically, we can say it is a link that carries many signals simultaneously, which leads to creating more efficient network access between two nodes. Basically, it is a type of connection on a switch. There are many differences between the trunk port and the access port. Similarly, if any device is plugged into this port, then it will only be able to communicate with other devices that are in the same VLAN.

Trunk ports mark frames with some uniquely identifying tags which are either