WAGO-ETHERNET-Zubehör 852
Enhanced Features
51
852-1305 8/4-Port 100BASE-T/1000BASE-SX/LX
Manual
1.1.0
QoS Enhancement
You can configure the switch to prioritize data traffic even if the incoming
packets are not marked with “IEEE 802.1p Priority Tags” or change the
existing
ׅ◌
“Priority Tags” based on the criteria you select. The switch allows you
to choose one of the following methods for assigning priority to incoming
packets:
•
802.1p Tag Priority
- Assign priority to packets based on the packet's “802.1p Tag Priority”.
•
Port-based QoS
- Assign priority to packets based on the incoming port on the switch.
•
DSCP-based QoS
- Assign priority to packets based on their DSCP (“
D
ifferentiated
S
ervices
C
ode
P
oints”).
Advanced QoS Methods
Advanced QoS methods only affect the internal “Priority Queue” mapping for the
switch. The switch does not modify the IEEE 802.1p value for the egress frames.
You can choose one of these options above to alter the way incoming packets are
prioritized or you can choose not to use any QoS extension setting on the switch.
802.1p Priority
When using the 802.1p priority mechanism, the packet is examined for the
presence of a valid “802.1p Priority Tag”. If it has a tag, the packet is designated
to a configurable “Egress Queue” based on its priority value. The “Tag Priority”
can be designated to any of the available “Queues”.
ETHERNET Packet
6
6
2
42-1496
4
DA SA Type / Length
Data
FCS
6
6
4
2
42-1496
4
DA SA
802.1Q Tag
Type / Length
Data
FCS
