Question regarding iApps, virtual servers, and VLAN tags

HI

Basically vlan tagging in essence allows you setup or run multiple vlan's on a single interface on your f5 appliance virtual or physical platform.

Your question regarding regarding the IApp and vlan tag. I am going to try to explain it to you for you to understand. The vlan tag and the iApp is unrelated configuration items. Your Iapp looks at your application configuration at a layer 7 level, and a couple of layers down(items such as tcp profile's). A vlan tag will and its corresponding self ip will be residing in the layer 3 and layer 2 level.

if you put this in context as I am posting this answer to you I am using my web browser as the application and HTTP as the means or container, my web browser does not care much of what my ip address is or vlan my pc is configured to use, my browser requires a network to connect to a web server but it does not really care what network consist of.

Your question regarding the vlan tunnel the virtual server should be listening on, as adb said its all about your enviroment, but it allows you as the administrator to lock down your virtual server to only listen for traffic in specific networks or vlans/subnets.