HP A5120 EI Series Configuration Guide

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Figure 35 Flowchart for processing an untagged frame in dynamic MAC-based VLAN assignment
No
Yes
No
The port uses the source
MAC address of the packet
to search the MAC address-
to-VLAN mapping table
A match is found?
Exactly
matched?
The port discards the
packet
The port is assigned to
the corresponding VLAN
The port forwards the
packet
The port receives
an untagged frame
Yes
 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.
NOTE:
If you configure both static and dynamic MAC-based VLAN assignment on the same port, dynamic
MAC-based VLAN assignment applies, and the port drops the frames that do not exactly match any
MAC address-to-VLAN entry.
Approach 3: Dynamic MAC-based VLAN
You can use dynamic MAC-based VLAN with access authentication (such as 802.1X authentication based
on MAC addresses) to implement secure, flexible terminal access. After configuring dynamic MAC-based
VLAN on the switch, you must configure the MAC address-to-VLAN entries on the access authentication
server.
When a user passes authentication of the access authentication server, the switch obtains VLAN
information from the server, generates a MAC address-to-VLAN entry by using the source MAC address
of the user packet and the VLAN information, and assigns the port to the MAC-based VLAN. When the
user goes offline, the switch automatically deletes the MAC address-to-VLAN entry, and removes the port
from the MAC-based VLAN.
Configuring MAC-based VLAN

HP A5120 EI Series Specifications

General

Uplink Ports	4 x SFP
Stacking	No
Management	CLI, Web, SNMP
Routing Protocols	RIP, OSPF
Power Supply	AC
MAC Address Table Size	16K
Dimensions	440 x 430 x 44 mm
Operating Temperature	0°C to 45°C
Operating Humidity	10% to 90% non-condensing
Model	HP A5120-24G EI Switch (JG234A)
VLANs	4094