SMC Networks TigerSwitch 100 manual Class of Service Configuration

CLASS OF SERVICE CONFIGURATION

Console(config)#interface ethernet	1/1	3-85
Console(config-if)#switchport acceptable-frame-types tagged		3-126
Console(config-if)#switchport ingress-filtering		3-127
Console(config-if)#switchport native vlan 3		3-128
Console(config-if)#switchport gvrp		3-132
Console(config-if)#garp timer join	10	3-134
Console(config-if)#garp timer leave 90		3-134
Console(config-if)#garp timer leaveall 2000		3-134
Console(config-if)#switchport mode	hybrid	3-125
Console(config-if)#

Class of Service Configuration

Class of Service (CoS) allows you to specify which data packets have greater precedence 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 queue will be transmitted before those in the lower-priority queues. You can set the default priority for each interface, and configure the mapping of frame priority tags to the switch’s priority queues.

Setting the Default Priority for Interfaces

You can specify the default port priority for each interface on the switch. All untagged packets entering the switch are tagged with the specified default port priority, and then sorted into the appropriate priority queue at the output port.

Command Usage

•This switch provides four priority queues for each port. It uses Weighted Round Robin to prevent head-of-queue blockage.

•The default priority applies if the incoming frame is an untagged frame received from a VLAN trunk or a static-access port. This priority does not apply to IEEE 802.1Q VLAN tagged frames. If the incoming frame is an IEEE 802.1Q VLAN tagged frame, the IEEE 802.1p User Priority bits will be used.

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