H3C Technologies H3C S10500 Series Switches - Manual (Page 135)

124
[DeviceA-GigabitEthernet1/0/3] display vlan 200
VLAN ID: 200
VLAN Type: static
Route Interface: not configured
Description: VLAN 0200
Name: VLAN 0200
Tagged Ports:
GigabitEthernet1/0/3
Untagged Ports:
GigabitEthernet1/0/2
MAC-based VLAN configuration
Introduction to MAC-based VLAN
The MAC-based VLAN feature assigns hosts to a VLAN based on their MAC addresses. This feature is
usually used in conjunction with security technologies such as 802.1X to provide secure, flexible network
access for terminal devices.
Static MAC-based VLAN assignment
Static MAC-based VLAN assignment applies to networks containing a small number of VLAN users. In
such a network, you can create a MAC address-to-VLAN map containing multiple MAC
address-to-VLAN entries on a port, enable the MAC-based VLAN feature on the port, and assign the port
to MAC-based VLANs.
With static MAC-based VLAN assignment configured on a port, the device processes received frames by
using the following guidelines:
• When the port receives an untagged frame, the device looks up the MAC address-to-VLAN map
based on the source MAC address of the frame for a match.
{
The device first performs a fuzzy match. In the fuzzy match, the device searches the MAC
address-to-VLAN entries whose masks are not all-Fs and performs a logical AND operation on
the source MAC address and each mask. If the result of an AND operation matches the
corresponding MAC address, the device tags the frame with the corresponding VLAN ID.
{
If the fuzzy match fails, the device performs an exact match. In the exact match, the device
searches the MAC address-to-VLAN entries whose masks are all-Fs. If the MAC address of a
MAC address-to-VLAN entry matches the source MAC address of the untagged frame, the
device tags the frame with the corresponding VLAN ID.
{
If no match is found, the device assigns a VLAN to the frame by using other criteria, such as IP
subnet or protocol, and forwards the frame.
{
If no VLAN is available, the device tags the frame with the PVID of the receiving port and
forwards the frame.
• When the port receives a tagged frame, the port forwards the frame if the VLAN ID of the frame is
permitted by the port, or otherwise drops the frame.
Dynamic MAC-based VLAN assignment
When you cannot determine the target MAC-based VLANs of a port, you can use dynamic MAC-based
VLAN assignment on the port. To do that, you can create a MAC address-to-VLAN map containing