Allied-telesis AT-S101 Manual de usuario descargar pdf (Pagina 187)

AT-S101 Management Software Features Guide

187

Classifier Criteria

The components of a classifier are defined in the following subsections.

Source MAC Address

Destination MAC Address

You can identify a traffic flow by specifying a source and/or destination

MAC address. For instance, you might create a classifier for a traffic flow

destined to a particular destination node, or from a specific source node to

a specific destination node, all identified by their MAC addresses.

The management software does not support a classifier based on a range

of MAC addresses. Different MAC addresses must be considered

separate traffic flows, with their own classifiers.

Ethernet 802.2 and Ethernet II Frame Types

You can create a classifier that filters packets based on Ethernet frame

type and whether a packet is tagged or untagged within a frame type. (A

tagged Ethernet frame contains within it a field that specifies the ID

number of the VLAN to which the frame belongs. Untagged packets lack

this field.) Options are:

 Ethernet II tagged packets

 Ethernet II untagged packets

 Ethernet 802.2 tagged packets

 Ethernet 802.2 untagged packets

802.1p Priority Level

A tagged Ethernet frame, as explained in “Tagged VLAN Overview” on

page 48, contains within it a field that specifies its VLAN membership.

Such frames also contain a user priority level used by the switch to

determine the Quality of Service to apply to the frame and which egress

queue on the egress port a packet should be stored in. The three bit binary

number represents eight priority levels, 0 to 7, with 0 the lowest priority

and 7 the highest. Figure 56 on page 188 illustrates the location of the

user priority field within an Ethernet frame.

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Allied-telesis AT-S101 Manual de usuario Pagina 187