Atop Technology EH7510 User manual - Manual (Page 22)

Atop Industrial Managed Ethernet Switch
EH7510
User Manual V 1.0
16
QoS Mode:
- WRR: Weighted Round Robin. This method services all the traffic queues, but higher
priority queues still retain their advantage; this mode guarantees that in the event that
high-priority traffic exceeds the link capacity, lower priority traffic will still proceed and not
be blocked.
- Strict is Strict-Priority Scheduling. The QoS scheduler preempts the highest queue as long
as there are packets. When all the packets are exhausted from the highest queue, the
QoS scheduler reverts back to the weighed fair algorithm to process the remaining
queues. This mode guarantees that traffic in the highest queue always flows first.
QoS Type:
- 802.1p CoS: IEEE standard of layer 2 marking scheme. It specifies a priority value
between 0 and 7 that can be used by QoS to differentiate traffic. When this option is
enabled, EH7510 inspects the 802.1p CoS tag in the MAC frame to determine the priority
of each frame.
- DiffServ/ToS : DiffServ stands for Differentiated Services. It’s a networking architecture
that specifies a simple but scalable mechanism for classifying network traffic and
providing QoS guarantees on networks. It uses the DiffServ Code Point (DSCP, which is
the modern redefinition of the ToS). DiffServ/ToS function allows users to use up to 64
values to define service levels and set priority.
Settings of CoS and ToS can be accessed on the mapping tables in next two options.