Publication date: Sept, 2015
Revision A1
157
2-‐17.2 Protocol -‐based VLAN
This section describes Protocol -‐based VLAN. Protocols supported by the switch include 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,
Decnet, 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 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 allows you to 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 selected stack switch.
Web Interface
To configure Protocol -‐based VLAN configuration in the web interface:
1. Click Protocol-‐based VLAN configuration and add a new entry.
2. Specify the Ethernet LLC SNAP Protocol and Group Name.
3. Click Apply.
Figure 2-‐17.2.1: The Protocol to Group Mapping Table
Parameter description:
Delete:
To delete a Protocol to Group Name map entry, check this box. The entry will be deleted on the
switch during the next Save.
Frame Type:
Содержание LPB2910A
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