Hitachi US7070447-001 manual Chapter VLAN Concepts

Chapter 8

VLAN Concepts

A VLAN is a network that logically divides workgroups by functions, applications, etc. without regards to the physical location of users, thereby localizing network traffic to those you would communicate with most often. VLANs are bounded by routers, therefore, data within a VLAN does not leave the VLAN without routing.

The HiSpeed switch uses IP routing to forward packets across different VLANs. Routing must be enabled per VLAN and assigned an IP address. When routing is enabled, a Virtual Router port is created and traffic is routed onto the VLAN via that Virtual Router port.

Note: The HiSpeed switch is pre-configured with a default VLAN 1. In order to route between VLANs, you must either connect an external router to the switch or enable IP routing per VLAN.

The HiSpeed switch implements VLANs on a per port(s) basis. Ports assigned to a VLAN share the same broadcast whereas ports not belonging to that VLAN are not part of that broadcast domain. By separating groups into different VLANs, overall network performance is improved. Unlike rule-based VLANs, multiple VLANs do not share the same physical segment (or switch port(s)).

US7070447-001, Rev 01 8-1