I am studying for the CCNP Switching exam and it covers VLANs and layer 3 switching moderately. It states that Cisco recommends a 1 to 1 mapping of VLANs to subnets. It also states that VLANs can be used to break up broadcast domains.
When you create different subnets, you are already breaking up broadcast domains, so does layer 3 switching require the use of VLANs to actually do the switching? Say for instance I have 2 hosts on the same layer 3 switch, but the two hosts are on 2 different IP subnets (No VLANs are defined). Host A wants to talk to host B. Can the switch not look up the routing info and then know to switch to that port? I am not seeing where the requirement for the VLAN comes into play. If VLANs are required for layer 3 switching, is that pretty much standard across the industry, or that a Cisco only thing? Thanks! Stephen Hoover Dallas, Texas Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=63147&t=63147 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
