User manual

APS User Manual
184
1.2.11-7 Protocol-based VLAN
This section describes Protocol -based VLAN, the APS Series support 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, 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 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.
1.2.11-7-1 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 switch.
Web Interface
To configure protocol to group mapping settings via the Web Interface:
1. Click Configuration, VLAN, Protocol-based VLAN’s and Protocol to Group.
2. Click Add New Entry and specify the Frame Type, Ethertype Value and give the group a
name.
3. Click the Apply button to save your changes or the Reset button to revert to previous
settings.