SMC Networks 10/100 manual Class of Service Configuration, 137

CLASS OF SERVICE CONFIGURATION

CLI – This example shows the switch configured with primary VLAN 5 and secondary VLAN 6. Port 3 has been configured as a promiscuous port and mapped to VLAN 5, while ports 4 and 5 have been configured as a host ports and associated with VLAN 6. This means that traffic for port 4 and 5 can only pass through port 3.

Console(config)#interface ethernet	1/3	3-89
Console(config-if)#switchport mode	private-vlan promiscuous	3-136
Console(config-if)#switchport private-vlan mapping 5		3-138
Console(config-if)#exit
Console(config)#interface ethernet	1/4	3-136
Console(config-if)#switchport mode	private-vlan host
Console(config-if)#switchport private-vlan host-association 6		3-137
Console(config-if)#exit
Console(config)#interface ethernet	1/5
Console(config-if)#switchport mode	private-vlan host

Console(config-if)#switchport private-vlan host-association 6 Console(config-if)#

Class of Service Configuration

Class of Service (CoS) allows data packets that have greater precedence to receive higher service priority when traffic is buffered in the switch due to congestion. This switch supports CoS with four priority queues for each port. Data packets in a port’s high-priority queues will be transmitted before those in the lower-priority queues.

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 for each queue. WRR uses a predefined 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

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