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Lantronix
SM24TBT2DPA and SM24TBT2DPB Web User Guide
2-17.2 Protocol-based VLAN
This page lets you add new protocols to Group Name (unique for each Group) mapping entries as well as
allow you to see and delete already mapped entries for the switch. Switch Protocol support includes
Ethernet, LLC, and SNAP Protocols.
LLC:
The Logical Link Control (LLC) data communication protocol layer is the upper sub-layer of the Data
Link Layer (which is itself layer 2, just above the Physical Layer) in the seven-layer OSI reference model. It
provides multiplexing mechanisms that make it possible for several network protocols (IP, IPX, Decent and
AppleTalk) to coexist within a multipoint network and to be transported over the same network media, and
can also provide flow control and automatic repeat request (ARQ) error management mechanisms.
SNAP:
The Subnetwork Access Protocol (SNAP) is a mechanism for multiplexing, on networks using
IEEE 802.2 LLC, more protocols than can be distinguished by the 8-bit 802.2 Service Access Point (SAP)
fields. SNAP supports identifying protocols by Ethernet type field values; it also supports vendor-private
protocol identifier spaces. It is used with IEEE 802.3, IEEE 802.4, IEEE 802.5, IEEE 802.11 and other
IEEE 802 physical network layers, as well as with non-IEEE 802 physical network layers such as FDDI
that use 802.2 LLC.
2-17.2.1 Protocol to Group
This page lets you add new protocols to Group Name (unique for each Group) mapping entries and lets
you to see and delete already mapped entries for the selected switch.
To configure Protocol-based VLAN configuration in the web interface:
1. Click Configuration, VCL, Protocol-based VLAN, and Protocol to Group.
2. Click the Add New Entry button.
3. Specify the Frame Type, Value, and Group Name parameters.
4. Click the Apply button.
Figure 2-21.2.1: Protocol to Group Mapping Table
Parameter descriptions:
Delete:
To delete a Protocol to Group Name map entry, check this box. The entry is deleted from the
switch immediately.
Frame Type:
Frame Type can be set to Ethernet, SNAP, or LLC as described below.
N
OTE
:
On changing the Frame type field, the valid value of the following field will vary
depending on the new Frame Type you selected.