Assigning Ip Interface Addresses And Subnet Masks To Vlans; Defining Static Routes - Enterasys VH-2402-L3 Management Manual

configured with a bit more care. Layer 3 VLANs (VLANs that
have an IP interface assigned to them) can be thought of as
network links – not just as a collection of associated end
users. Further, Layer 3 VLANs are assigned an IP interface
address and subnet mask to enable IP routing between
them.
IEEE 802.1Q VLANs must be configured on the switch before they
can be assigned IP interface addresses or subnet masks. Further,
the static VLAN configuration is specified on a per port basis. On the
VH-2402-L3, a VLAN can consist of end-nodes – just like a
traditional layer 2 switch, but a VLAN can also consist of a
subnetwork defined by an IP interface address and a subnet mask.
The IP subnets for the 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 Interface Addresses and Subnet Masks
to VLANs
The VH-2402-L3 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 regards a VLAN with an IP interface
address and corresponding subnet mask assigned as an IP
subnet in IP Routing mode.

Defining Static Routes

Routes between the IP interfaces and a default gateway or
other router with a WAN connection should be determined
beforehand and entered into the static/default routing table
on the VH-2402-L3.
9033691-01 VH-2402-L3 Management Guide 3