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SG71070M
Revision A3
2-12.2 Protocol -based VLAN
This section describes Protocol-based VLAN. The switch supports protocols including Ethernet,
LLC, and SNAP.
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.
2-12.2.1 Group to VLAN
This section allows you to map an already configured Group Name to a VLAN for the selected
stack switch.
Web Interface
To Display Group Name to VLAN mapping table configured in the web interface:
1. Click Group Name VLAN configuration and add new entry.
2. Specify the Group Name and VLAN ID.
3. Click Apply.
Figure 2-12.2.1: The Group Name of VLAN Mapping Table
Parameter description:
Delete
To delete a Group Name to VLAN map entry, check this box. The entry will be deleted on the
switch during the next Save
Group Name
A valid Group Name is a string of almost 16 characters which consists of a combination of
alphabets (a-z or A-Z) and integers (0-9), no special character is allowed. Whichever Group
name you try map to a VLAN must be present in Protocol to Group mapping table and must
not be perused by any other existing mapping entry on this page.