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Chapter 2. VLANs | 31
ProSafe M4100 and M7100 Managed Switches
Virtual VLANs: Create an IP Subnet–Based VLAN
In an IP subnet–based VLAN, all the end workstations in an IP subnet are assigned to the
same VLAN. In this VLAN, users can move their workstations without reconfiguring their
network addresses. IP subnet VLANs are based on Layer 3 information from packet headers.
The switch makes use of the network-layer address (for example, the subnet address for
TCP/IP networks) in determining VLAN membership. If a packet is untagged or priority
tagged, the switch associates the packet with any matching IP subnet classification. If no IP
subnet classification can be made, the packet is subjected to the normal VLAN classification
rules of the switch. This IP subnet capability does not imply a routing function or that the
VLAN is routed. The IP subnet classification feature affects only the VLAN assignment of a
packet. Appropriate 802.1Q VLAN configuration must exist in order for the packet to be
switched.
PC 1 PC 2
10.100.5.1 10.100.5.30
Switch
1/0/24
1/0/1
Figure 2. IP subnet–based VLAN
CLI: Create an IP Subnet–Based VLAN
(Netgear Switch) #vlan database
(Netgear Switch) (Vlan)#vlan 2000
(Netgear Switch) (Vlan)#vlan association subnet 10.100.0.0 255.255.0.0 2000
(Netgear Switch) (Vlan)#exit
Create an IP subnet–based VLAN 2000.
(Netgear Switch) #config
(Netgear Switch) (Config)#interface range 1/0/1-1/0/24
(Netgear Switch) (conf-if-range-1/0/1-1/0/24)# vlan participation include 2000
(Netgear Switch) (conf-if-range-1/0/1-1/0/24)#exit
(Netgear Switch) (Config)#