SNR S2989G-8TX — dynamic VLAN Configuration and Benefits for Network Management [140/553]

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S2989G-24TX Operation Manual Chapter 2 Layer 2 services

Configuration

2.17

Dynamic VLAN

2.17.1

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.

2.17.2

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

1. 4. Configure the IP-subnet-based VLAN function on the port

5. Configure the correspondence between the IP subnet and the VLAN