SNR S2940-8G-v2 Switch Configuration Guide
Dynamic VLAN Configuration
Chapter 21
Dynamic VLAN Configuration
21.1 Introduction to Dynamic VLAN
The dynamic VLAN is named corresponding to the static VLAN (namely the port based VLAN).
Dynamic VLAN supported by the switch includes MAC-based VLAN, IP-subnet-based VLAN and
Protocol-based VLAN. Detailed description is as follows:
The MAC-based VLAN division is based on the MAC address of each host, namely every host
with a MAC address will be assigned to certain VLAN. By the means, the network user will maintain
his membership in his belonging VLAN when moves from a physical location to another. As we
can see the greatest advantage of this VLAN division is that the VLAN does not have to be re-
configured when the user physic location change, namely shift from one switch to another, which
is because it is user based, not switch port based.
The IP subnet based VLAN is divided according to the source IP address and its subnet mask of
every host. It assigns corresponding VLAN ID to the data packet according to the subnet segment,
leading the data packet to specified VLAN. Its advantage is the same as that of the MAC-based
VLAN: the user does not have to change configuration when relocated.
The VLAN is divided by the network layer protocol, assigning different protocol to different
VLANs. This is very attractive to the network administrators who wish to organize the user by
applications and services. Moreover the user can move freely within the network while maintaining
his membership. Advantage of this method enables user to change physical position without
changing their VLAN residing configuration, while the VLAN can be divided by types of protocols
which is important to the network administrators. Further, this method has no need of added frame
label to identify the VLAN which reduce the network traffic.
Notice: Dynamic VLAN needs to associate with Hybrid attribute of the ports to work, so the
ports that may be added to a dynamic VLAN must be configured as Hybrid port.
21.2 Dynamic VLAN Configuration
Dynamic VLAN Configuration Task Sequence:
1. Configure the MAC-based VLAN function on the port
2. Set the VLAN to MAC VLAN
3. Configure the correspondence between the MAC address and the VLAN
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