Quality of Service (QoS) Overview
Overview
ML700 units apply user configured QoS on traffic received on the Ethernet ports and again
on the same traffic as it is processed and forwarded to the HSL ports.
The following QoS elements can be configured on each Ethernet port:
Classification method - forced, COS or TOS/DSCP, according to the method which the
data received on that port is analyzed and classified.
Queuing - assignment of the original data traffic to one of four or eight queues (model
dependent) according to its classification marking (i.e. COS frame 3 to queue 4, COS
frame 6 to queue 8, etc.). The markings to queue allocation are determined by the (system
level) classification tables (on page 7-6).
Scheduling - priority mechanisms to be applied to the queues to match Traffic
Management objectives of jitter, latency and frame loss ratio.
On Ethernet (ETH-x) ports, L2/L3 Priority-to-Traffic Class mapping is applied on original
frame data. On an HSL port, L2 Priority-to-Traffic Class mapping is applied only after L2
Priority COS bits translation (regeneration) is applied, see CoS Marking Configuration. Thus,
Classification result on an HSL port depends on the configuration of two tables (Translation
and then Classification).
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