Planet IGSW-2840 User Manual page 235

4.10.2 Layer 3/4 Priority Settings
4.10.2.1 Mapping Layer 3/4 Priorities to CoS Values
This Industrial Managed Switch supports several common methods of prioritizing layer 3/4 traffic to meet application
requirements. Traffic priorities can be specified in the IP header of a frame, using the priority bits in the Type of Service (TOS)
octet or the number of the TCP port. If the priority bits are used, the TOS octet may contain three bits for IP Precedence, four
bits for IP TOS (see page 3-227), or six bits for Differentiated Services Code Point (DSCP) service. When these services are
enabled, the priorities are mapped to a Class of Service output queue.
Because different priority information may be contained in the traffic, the Industrial Managed Switch maps priority values to the
output queues in the following manner – The precedence for priority mapping is IP Port Priority, IP Precedence/DSCP/ToS
Priority, and then Default Port Priority.
4.10.2.2 IP DSCP Priority Status
The page includes the following fields:
Object
IP DSCP Priority Status
IP DSCP priority settings apply to all interfaces.
Figure 4-10-5 IP DSCP Priority Status screenshot
Description
Enables or disables IP DSCP priority.
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User's Manual of IGSW-2840