HI Kasi,
Please do not write in block capitals, is like shout
Yes, you need to register in virtualhosts all the ports you want attend, but only in virtualhost that you dedicate to attend your applications.
Normally you have two virtualhosts, default_host and admin_host. default, to serve requests of applications and admin, to serve adminconsole.
In default_host you will have ports 80, 443, WC_defaulthost and WC_defaulthost_secure.
Because your IHS port (86) is not default (80) you need to add it to virtualhost that serve your default_application. Then regenerate and propagate the plugin for WebServer be aware about configuration changes.
The same happens if you change your WC_defaulthost and WC_defaulthost_secure after the change you need to update the virtualhosts and regenerate/propagate the plugin
Virtual hosts
pic.dhe.ibm.com/infocenter/wasinfo/v7r0/...Hope this helps.
Regards