Layer 3/4 Priority Settings; Mapping Layer 3/4 Priorities To Cos Values - Supermicro SSE-G2252 User Manual

Chapter 11: Class of Service
Figure 11-5. Mapping CoS Values to Egress Queues
To show the internal PHB to hardware queue map:
1. Click T > P > PHB Q .
RAFFIC RIORITY TO UEUE
2. Select S from the Action list.
HOW
Figure 11-6. Showing CoS Values to Egress Queue Mapping

11-2 Layer 3/4 Priority Settings

Mapping Layer 3/4 Priorities to CoS Values

The 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/UDP
port. If priority bits are used, the ToS octet may contain three bits for IP Precedence or
six bits for Differentiated Services Code Point (DSCP) service. When these services are
enabled, the priorities are mapped to a Class of Service value by the switch, and the
traffic then sent to the corresponding output queue.
11-7