Assigning Ip Network Addresses And Subnet Masks To Vlans - D-Link DES-3326 User Manual

24-port NWay Ethernet Switch User's Guide
IP interface assigned to them) could be thought of as network
links – not just as a collection of associated end users. Further,
Layer 3 VLANs are assigned an IP network address and subnet
mask to enable IP routing between them.
Layer 3 VLANs must be configured on the switch before they can
be assigned IP subnets. Further, the static VLAN configuration
is specified on a per port basis. On the DES-3326, a VLAN can
consist of end-nodes – just like a traditional layer 2 switch, but a
VLAN can also consist of one or more layer 2 switches – each of
which is connected to multiple end-nodes or network resources.
So, a Layer 3 VLAN, consisting of 4 ports, could be connected to
4 layer 2 switches. If these layer 2 switches each have 24 ports,
then the Layer 3 VLAN would contain 4 x 24 = 96 end nodes.
Assigning an IP subnet to the Layer 3 VLAN would allow wire-
speed IP routing from the WAN to each end node and between
end nodes.
So, the IP subnets for a network must be determined first, and
the VLANs configured on the switch to accommodate the IP
subnets. Finally, the IP subnets can be assigned to the VLANs.
Assigning IP Network Addresses and
Subnet Masks to VLANs
The DES-3326 allows the assignment of IP subnets to individual
VLANs. Any VLAN configured on the switch that is not assigned
an IP subnet, will behave as a layer 2 VLAN and will not be
capable of IP routing – even if the switch is in IP Routing mode.
Developing an IP addressing scheme is a complex subject, but it
is sufficient here to mention that the total number of anticipated
end nodes – for each Layer 3 VLAN – must be accommodated
with an unique IP address. It should be noted that the switch
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