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LGB5028A User‘s Manual
724-746-5500 | blackbox.com
Chapter 6: Configuration
Parameter Description
Port Members: A checkbox is provided for each port of a private VLAN. When checked, port isolation is enabled on that port.
When unchecked, port isolation is disabled on that port. By default, port isolation is disabled on all ports.
Buttons:
Save: Click to save changes.
Reset: Click to undo any changes made locally and revert to previously saved values.
6.10.6 MAC-Based VLAN
MAC address-based VLAN decides the VLAN for forwarding an untagged frame based on the source MAC address of the frame.
A common way of grouping VLAN members is by port, hence the name port-based VLAN. Typically, the device adds the same
VLAN tag to untagged packets that are received through the same port. Later on, these packets can be forwarded in the same
VLAN. Port-based VLAN is easy to configure, and applies to networks where the locations of terminal devices are relatively fixed.
As mobile office and wireless network access gain more popularity, the ports that terminal devices use to access the networks are
very often non-fixed. A device may access a network through Port A this time, but through Port B the next time. If Port A and
Port B belong to different VLANs, the device will be assigned to a different VLAN the next time it accesses the network. As a
result, it will not be able to use the resources in the old VLAN. On the other hand, if Port A and Port B belong to the same VLAN,
after terminal devices access the network through Port B, they will have access to the same resources as those accessing the
network through Port A do, which brings security issues. MAC-based VLAN technology provides user access and ensures data
security.
MAC-based VLANs group VLAN members by MAC address. With MAC-based VLAN configured, the device adds a VLAN tag to
an untagged frame according to its source MAC address. MAC-based VLANs are mostly used with security technologies such as
802.1X to provide secure, flexible network access for terminal devices.
Configuration
The MAC-based VLAN entries can be configured here. This page allows for adding and deleting MAC-based VLAN entries and
assigning the entries to different ports. This page shows only static entries.
Web Interface
To configure MAC address-based VLAN configuration in the Web interface:
1. Click “MAC address-based VLAN configuration” and add new entry.
2. Specify the MAC address and VLAN ID.
3. Click “Save.”