SW3-L3
GIGABIT/FAST ETHERNET SWITCH/ROUTER TYPE SW3-L3
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USER GUIDE - M0SW3M1902Iv07 - V06 February 2019
FIGURE 35
Example of configuration of
LLDP
menu
5.7
QoS CONFIGURATION
The Quality of Service (QoS) permits the traffic classification and service policy and selects
the conditions in which it will be treated by the equipment.
The equipment provides QoS at level 2 (switching). Level 2 QoS is performed on switched
traffic, adjusted to the processing of parameters and behaviour of IEEE 802.1p, with four
internal priority levels. This priority is taken into account for selecting the processing and
transmission order in each switch output interface.
Two potential service policies are admitted in processing the queues for each priority:
Priority
or
Weight Fair Scheduling
(WFQ)
. The
Priority
policy only serves a queue with a
lower priority when the higher priority queues are empty. The
WFQ
policy guarantees a
weighted service for all the priority, but pre-eminently to queues with a high priority.
The service policy is unique for level 2 service. The parameters are the VLAN and the
priority 802.1p (included in the tag or assigned depending on the input port) or the DSCP
field of level 3.
The priority supported by standard 802.1p admits values of between 0 and 7. The untagged
frames received are given a priority within that range, depending on the interface through
which they were received, pursuant to the section entitled
QoS Layer 2 (ports)
. Tagged
frames may include either the VLAN identifier as the priority (tagged) or only the priority
(priority tagged, VLAN = 0). If the VLAN identifier is included, they are processed in
accordance with the rules of the section
QoS Layer 2 (VLANs)
. If, on the contrary, they
only include the priority, they are processed in accordance with the section entitled
QoS
Layer 2 (ports).
