Linked Questions

2
votes
3answers
8k views

Tagged vs Untagged Question [duplicate]

Since I'm a noob, I'm unable to post a follow up question on the following question... Why and how are Ethernet Vlans tagged? In my image, I believe I have correctly depicted how tagged networking ...
2
votes
1answer
3k views

How a packet processor detects if vlan tag is present in Ethernet header or not? [duplicate]

AFAIK 802.1Q tag is optional in the FRame header. So it may or not be present in the header right? SO how does the Packet processing ASIC or processor identifies or parses to interpret the frame ...
1
vote
4answers
730 views

Why do we use vlan tagged port? [duplicate]

We know that a switch can be divided logically into different lans by using VLAN using VLAN tagged mechanism. Now is it necessary that in each vlan to tagg a port? Also what is the use of tagged port? ...
0
votes
1answer
32 views

Where are VLAN tagged packets? [duplicate]

Are they only in trunk links between switches/routers' packets? Is there any way an endpoint sees tagged VLAN packets? (containing VLAN tags) What if I an endpoint sends a tagged packet that ...
0
votes
0answers
18 views

Please correct my VLAN conception [duplicate]

As I know VLAN is a control function for layer 2 engine. I think VLAN in layer 2 is cutting switch ports as group and specify trunk port in layer 1. So VLAN ID in layer 2 means each VLAN pool identity ...
1
vote
2answers
3k views

How does switch treat ingress tagged packet? [closed]

I have a dumb question regarding VLAN and switching. Suppose I have a switch that receives some incoming packets which are tagged with different VLANs. The packets' destinations are to the router ...
4
votes
2answers
378 views

necessary and sufficient condition for vlans to communicate together

Let's say I know my switches configurations, for each, I know what port are configured in access, what port are in trunk, and what vlan is on a port. For each device. I want to group vlan that can ...
2
votes
1answer
306 views

Multiple VLAN setup questions

Ok, I have a basic understanding of VLAN's but I am trying to do the following setup which seems way more complicated than it should be because of things I am not sure of. I am doing this because we ...
4
votes
1answer
76 views

changing native vlan the mngmt vlan should be seperate, right or wrong? And, which device ip default gateway to use on access Distro core

Please help clear this up, I've read too many posts that just don't get it. If change access and distro to native vlan 5 device Mngmt vlan 100 blackhole 999 connections from core to distro should ...
0
votes
1answer
53 views

How can i make every network on this topology speak together?

i'm working on this topology for so long and i didn't manage to make every network speak together with different VLAN on each network. On this topology: When i trace a packet sent from PC3 to PC4, ...