Dell S3048-ON User Manual

Setting a dot1p Value for Egress Packets
To set a dot1p value for egress packets, use the following command.
• Set a dscp or dot1p value for egress packets.
QOS-POLICY-IN mode
set mac-dot1p
Creating an Output QoS Policy
To create an output QoS policy, use the following commands.
1 Create an output QoS policy.
CONFIGURATION mode
qos-policy-output
2 After you congure an output QoS policy, do one or more of the following:
Scheduler Strict — Policy-based Strict-priority Queueing conguration is done through scheduler strict. It is applied to Qos-policy-
output. When scheduler strict is applied to multiple Queues, high queue number takes precedence.
Allocating Bandwidth to Queue
Specifying WRED Drop Precedence
Conguring Policy-Based Rate Shaping
To congure policy-based rate shaping, use the following command.
• Congure rate shape egress trac.
QOS-POLICY-OUT mode
rate-shape
Allocating Bandwidth to Queue
The switch schedules packets for egress based on Decit Round Robin (DRR). This strategy oers a guaranteed data rate.
Allocate bandwidth to queues only in terms of percentage in 4-queue and 8-queue systems. The following table shows the default
bandwidth percentage for each queue.
The following table lists the default bandwidth weights for each queue, and their equivalent percentage which is derived by dividing the
bandwidth weight by the sum of all queue weights.
Table 56. Default Bandwidth Weights
Queue Default Bandwidth Percentage for 4–
Queue System
Default Bandwidth Percentage for 8–
Queue System
0 6.67% 1%
1 13.33% 2%
2 26.67% 3%
3 53.33% 4%
4 - 5%
Quality of Service (QoS) 645

Dell S3048-ON Specifications

General

Rack Units	1U
Form Factor	Rack-mountable
Input Voltage	100-240V AC
Power Supply	2 hot-swappable power supplies
Management	CLI, Web, SNMP
Product Type	Switch
MAC Address Table Size	32K entries
Jumbo Frame Support	Yes
Latency	< 3 microseconds
Ports	48 x 1GbE RJ45, 4 x 10GbE SFP+