Cisco Systems SLM2008RF manual Configuring QoS Settings

Advanced Configuration	5
QoS

•Multicast Rate—Select the storm control multicast rate threshold from the list or select the default value, No Limit.

STEP 3 Click Save.

QoS

Configuring QoS Settings

Network traffic is usually unpredictable and the only basic assurance that can be offered is best effort traffic delivery. To overcome this challenge, QoS is applied throughout the network. This ensures that network traffic is prioritized according to specified criteria, and that specific traffic receives preferential treatment. QoS in the network optimizes network performance and entails two basic facilities:

Classifying incoming traffic into handling classes, based on an attribute, including:

•The ingress interface

•Packet content

•A combination of these attributes

•Providing various mechanisms for determining the allocation of network resources to different handling classes, including:

•The assignment of network traffic to a particular hardware queue

•The assignment of internal resources

You can set the switch to service the queues based on a strict rule that requires all traffic in a higher priority queue to be processed before lower priority queues are serviced, or use Weighted Round-Robin (WRR) queuing that specifies a relative weight of each queue. WRR uses a pre-defined relative weight for each queue that determines the percentage of service time the switch services each queue before moving on to the next queue. This prevents the head-of-line blocking that can occur with strict priority queuing.

Cisco SLM2008 8-Port Gigabit Smart Switch with PD and AC Power Administration Guide 35