Port Trunking - Dell PowerConnect 3048 User Manual

In the Default Port CoS page, you can specify the priority for each port on your switch.
Layer 3 Priority — DiffServ
DiffServ — You can change the default Type of Service (ToS) priority by selecting Normal Priority or High Priority for each class of services. This setting
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leverages the IETF definition of the IPv4 ToS octet in the IP packet-header by using the Differentiated Services Code.
Point (DSCP) field (6 bits) classifies packets into any of the 64 possible classes.
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Port Trunking

In the Port Trunking page, you can create multiple links between switches that work as one virtual, aggregate link. Trunks can be defined for similar port
types only. For example, a 10/100 port cannot form a Port Trunk with a gigabit port. For 10/100 ports, trunks can only be formed within the same cluster. A
cluster is a set of eight ports. Four trunks can be created at the same time. Spanning Tree will treat trunked ports as a single virtual port.
NOTICE: Fast Ethernet trunks can only include ports from a single eight-port cluster: Ports 1 to 8, ports 9 to 16, ports 17 to 24, ports 25 to 32, ports 33
to 40, or ports 41 to 48.