User's Manual

Chapter 3 - Configuration
Technical User Manual
InfiLINK XG
91
When the actual traffic load reached the egress rate, the switch will favor the
transmission of the highest priority packets in the detriment of the lower priority
ones.
Strict or weighted round robin packet scheduling algorithms
The strict priority queuing or weighted round robin scheduling alorithms can be
configured for the packets received at the radio interfaces and exiting the priority
queues:
- Strict priority queuing: packets from lower priority queues are delayed
in case higher priority queues has traffic
- Weighted round robin: weights are used for every queue of an interface,
which allows different queues to have different service shares depending
on the weight value.
No matter the interface on which the packets were received, one of the two packet
scheduling algorithms can be configured in order to determine the strategy for
emptying the priority queues.
Go to the “Switch” menu page in the Web interface and configure the “QoS mode”
parameter in the “Switch Port Settings” section. In the example below the
“Weighted Round Robin” is configured for the ge0 interface and the “Strict”
scheduling algorithm is configured for the radio interface:
Figure 69 - Configuring the packet scheduling algorithm
Three QoS strategies
Three QoS strategies are available for the radio interface transmission in order to
accommodate different packet loss requirements for the high priority packets:
- Aggressive: maximal throughput performance, but up to 10% priority
packet loss
- Conservative: no priority packet loss allowed, but up to 10% peak
throughput decrease compared to the aggressive strategy