SW3-L3
GIGABIT/FAST ETHERNET SWITCH/ROUTER TYPE SW3-L3
74/180
USER GUIDE - M0SW3M1902Iv07 - V06 February 2019
•
Use IEEE 802.1p.
The enabled option indicates that the priority field present in the
frames must be used when they include tag 802.1p. The assigning of internal
priorities is done based on the values selected in the section entitled
VLAN
Priority Mapping.
•
Use DSCP.
The enabled option indicates that the DSCP field of the frames
received must be processed, to assign the internal frame priority of the frame,
based on the values selected in the section entitled
DSCP Priority Mapping.
The options
Use IEEE 802.1p
and
Use DSCP
may be activated simultaneously.
The hierarchy for the final priority assigned to the frame is the following:
DSCP
,
IEEE 802.1p
and
Priority
(user); so that:
- The priority selected as default value in the input port will be associated with a
frame without tag 802.1.
- Regardless of whether the priority was already included in the original frame or
assigned by the mechanism described in the previous paragraph, if header is
IPv4, the choice of the process queue will take into account the value of the
DSCP field. If the traffic is not IPv4, the choice of the process queue will be
based on the priority 802.1.
QoS layer 2 (VLANs):
This section includes a table that supports adding and removing sets of parameters.
•
#.
Indicator of position in the table.
•
VID.
VLAN identifier value included in the tag 802.1.
•
PRI Override.
This sets whether the priority of the frames belonging to the VLAN
that matches the VID field should be modified (option enabled) or must remain the
priority received (option NOT enabled).
•
PRI.
If the
PRI Override
option is enabled, it modifies the priority assigned to the
frames belonging to the VLAN that matches the VID field.
