User's Manual

Configuration Guide of XGS-5240-Series
186
22.5 Dynamic VLAN Configuration
22.5.1
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.
22.5.2 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
4. Configure the IP-subnet-based VLAN function on the port
5. Configure the correspondence between the IP subnet and the VLAN
6. Configure the correspondence between the Protocols and the VLAN
7. Adjust the priority of the dynamic VLAN