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3.
CoS (Class of Service)
There are 4 transmit queues per port in the switch to support CoS function and you
configure the CoS function of the switch with this function.
1. Global
Because this switch can perform CoS function with Port-base, VLAN-base or TOS-
base, you can configure it with this function.
TOS Over VLAN priority
: If enabled, the priority information in TOS will be
processed first then priority information in VLAN tag. If disabled, the priority
information in VLAN tag will be processed first.
Port-Base Priority
: If enabled, all the packets received from this port will be always
sent with the assigned priority and the priority information in VLAN tag and TOS
will be ignored.
Port Priority
: Assign the transmit priority of packets received from the port if "Port-
Base Priority" is enabled.
2. VLAN/TOS Priority Map
You can map the priority value in VLAN/TOS to the four transmit queues with this
function.
There could be eight different priority values in VLAN tag and TOS and these values
will be mapped to the four transmit queues in each port of the switch. You can
arrange the mapping here.
