ProLiant BL p-Class GbE Interconnect Switch Command Line Interface Reference Guide

Configuring the GbE Interconnect Switch using the Command Line Interface
Configuring Class of Service, Default Port Priority, and Traffic
Class
Class of Service (CoS) for packet prioritization allows you to set priority levels for
forwarding packets based on the priority setting information in the packets.
The GbE Interconnect Switch supports four classes (0-3) of traffic (buffers or queues) per
egress port. You can map eight priority levels (0-7) to the four queues. Traffic from a specific
server port can be given priority over packets from other devices according to the range of
priority levels. Seven (7) is the highest priority; zero (0) is the lowest priority. By default,
queue 3 has the highest priority setting; queue 0 has the lowest priority setting.
You can set the following queue scheduling algorithms:
•
•
Strict Priority Based Scheduling (Strict): If there are any packets residing in the high
priority of the transaction, then they are taken up first for transmission.
Weighted Priority Based Scheduling (Round-robin): This option provides continuous
transmitting packet count at each queue. If the count is used up, the next priority queue is
taken up for the transmission. The range of packet count is from 1 to 255 per queue.
You can also enable or disable a latency-based limit on a per queue basis. If any packet
latency is greater than the maximum latency, the packet is dropped.
The following shows the CoS factory default settings:
Feature Default Value
Scheduling Mechanism for CoS Queues Strict
CoS—Max Packets 10
CoS—Max Latency 0
Default Port Priority 0
Class of Traffic
• Priority 0, 1: Class 0
• Priority 2, 3: Class 1
• Priority 4, 5: Class 2
• Priority 6, 7: Class 3
Setting Class of Service, Default Port Priority, and Traffic Class
Use the following command to set Class of Service (CoS), default port priority, and traffic
class parameters:
HP ProLiant BL p-Class GbE Interconnect Switch Command Line Interface Reference Guide 2-25