Configuration Guide VLAN Configuration
VLAN Configuration
This chapter describes how to configure IEEE802.1q VLAN.
Overview
Virtual Local Area Network (VLAN) is a logical network divided on a physical
network. VLAN corresponds to the L2 network in the ISO model. The division of
VLAN is not restricted by the physical locations of network ports. A VLAN has
the same attributes as a common physical network. Except for no restriction on
physical location, unicast, broadcast and multicast frames on layer 2 are
forwarded and distributed within a VLAN, not being allowed to directly go to
other VLANs.Therefore, when a host in a VLAN wants to communicate with
another host in another VLAN, a layer 3 device must be used, as shown in the
following diagram.
You can define a port as the member of a VLAN. All the terminals connected to
the specified port are part of the VLAN. A network can support multiple VLANs.
In this case, when you add, delete, and modify users in the VLANs, you do not
need to modify the network configuration physically.
Like a physical network, a VLAN is usually connected to an IP subnet. A typical
example is that all the hosts in the same IP subnet belong to the same VLAN. A
layer 3 device must be used for communication between VLANs. Ruijie L3
devices can perform IP routing between VLANs through SVI (Switch Virtual
Interfaces). For the configuration about SVI, refer to Interface Management
Configuration and IP Unicast Routing Configuration.
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