VCL
HMG-838PT & HMG-838EPT Web Configuration 17-2
MAC-based VLAN Membership Status for User Static:
MAC Address: Display the configured MAC addresses.
VLAN ID: Display the VLAN ID of this membership entry.
Port Members: Display ports that accept the configured MAC address.
17-2 Protocol-based VLAN
The network devices required to support multiple protocols cannot be easily grouped into a common VLAN. This may
require non-standard devices to pass traffic between different VLANs in order to encompass all the devices participating
in a specific protocol. This kind of configuration deprives users of the basic benefits of VLANs, including security and
easy accessibility.
To avoid these problems, you can configure this switch with protocol-based VLANs that divide the physical network into
logical VLAN groups for each required protocol. When a frame is received at a port, its VLAN membership can then be
determined based on the protocol type being used by the inbound packets.
17-2.1 Protocol to Group
Protocol to Group Mapping Table:
Frame Type: There are three frame types available for selection; these are “Ethernet”, “SNAP”, and “LLC”. The
value field will change accordingly.
Value: This field specifically indicates the protocol type. This value field varies depending on the frame type you
selected.
Ethernet: Ether Type (etype) value. By default, it is set to 0x0800. The range allowed is 0x0600 to 0xffff.
SNAP: This includes OUI (Organizationally Unique Identifier) and PID (Protocol ID) values.
z OUI: A value in the format of xx-xx-xx where each pair (xx) in the string is a hexadecimal value in the
ranges of 0x00-0xff.
z PID: If the OUI is hexadecimal 000000, the protocol ID is the Ethernet type field value for the protocol
running on top of SNAP. If the OUI is that of a particular organization, the protocol ID is a value
assigned by that organization to the protocol running on top of SNAP. In other words, if value of the OUI
field is 00-00-00, then value of the PID will be etherType (0x0600-0xffff), and if value of the OUI is other
than 00-00-00, then valid value of the PID will be any value from 0x0000 to 0xffff.
LLC (Logical Link Control): This includes DSAP (Destination Service Access Point) and SSAP (Source
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