OK, so i know VLAN works on either layer 2 or layer 3. What is the purpose of putting VLAN on layer 2? just to subdivide a switch to function as multiple switches?
Also, the environment i am in currently has 3 vlans (production, dmz, public wireless). i know there should be managment, backup vlans etc, but thats not part of this project scope. Anyways i am going to be changing all the infrastructur to 2 cat 4507s and 6 3000 series switches. Each vlan has a diff. ip schema, ie. production is 10.0.0.x where DMZ is 192.168.2.x etc. so correct me if im wrong but obv i am going to use them on layer 3.
In such i will have a min of 1 VTP server. On each 3000 series switch they will simply add more ports to a vlan. will i use the INT VLAN command or will i keep those on layer 2?
Layer 2 is to put all ports that are in that vlan into it's own broadcast domain . They can talk to each other directly without intervention . If they need to talk outside their own domain then you have to have a layer 3 definition . It is a general correlation between a layer 2 vlan and a layer 3 SVI if it needs to be routed . If you have ports that are in a layer 2 vlan and routing is required then you must create a layer 3 SVI .
If there is an organization's network which is all in 1 VLAN and uses 10.0.0.0/8 and they decide to change it to use multiple VLANs then they will also need to change it to use multiple subnets. Effectively each VLAN needs to be a unique subnet.
Think about a 100 users in a flat vlan, and broadcasts going across the network has to be processed by all 100 PCs. If you segment this into two vlans, broadcasts are cut down by 1/2. Performance wise thats half the amount of broadcasts that each nic has to process.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...