RACOM Ray2, Руководство пользователя

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Egress queue control
See also Output queue diagram.
Fig. 7.23: Menu Switch settings - Egress queue
Port name
Identification of the internal switch port. The switch ports are connected to an ex-
ternal port or to an internal device (radio modem, management CPU).
The external port (with RJ45 interface) labeled "E1+POE".
The external port (with SFP interface) labeled "E2".
The internal radio modem - link to the peer unit.
The internal port to management CPU. Eth1
Eth2
Air
CPU
Scheduling
mode
Port's Scheduling mode.
The device supports strict priority, weighted round robin, or a mixture on a per
egress port selection basis.
In the strict priority scheme all top priority frames egress for a port until that priority’s
queue is empty, then the next lower priority queue’s frames egress, etc. This ap-
proach can cause the lower priorities to be starved out preventing them from
transmitting any frames but also ensures that all high priority frames egress the
switch as soon as possible.
In the weighted scheme an 8, 4, 2, 1 weighting is applied to the four priorities unless
an alternate weighting is programmed into the QoS Weights Table. This approach
prevents the lower priority frames from being starved out with only a slight delay
to the higher priority frames.
Some applications may require the top priority queue, or the top two priority queues
to be in a fixed priority mode while the lower queues work in the weighted approach.
All scheduling modes are selectable on a per port basis.
The port scheduling mode can be one of the following values:
Use a weighted round robin queuing scheme. weighted RRB
RAy2 Microwave Link – © RACOM s.r.o. 98
Configuration