Qos Commands - D-Link xStack DES-3800 Series Cli Manual

xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch CLI Manual

QoS Commands

The DES-3800 Series supports 802.1p priority queuing. The Switch has 8 priority queues. These priority
queues are numbered from 7 (Class 7) — the highest priority queue — to 0 (Class 0) — the lowest
priority queue. The eight priority tags specified in IEEE 802.1p (p0 to p7) are mapped to the Switch's
priority queues as follows:
• Priority 0 is assigned to the Switch's Q2 queue.
• Priority 1 is assigned to the Switch's Q0 queue.
• Priority 2 is assigned to the Switch's Q1 queue.
• Priority 3 is assigned to the Switch's Q3 queue.
• Priority 4 is assigned to the Switch's Q4 queue.
• Priority 5 is assigned to the Switch's Q5 queue.
• Priority 6 is assigned to the Switch's Q6 queue.
• Priority 7 is assigned to the Switch's Q7 queue.
Priority scheduling is implemented by the priority queues stated above. The Switch will empty the four
hardware priority queues in order, beginning with the highest priority queue, 7, to the lowest priority
queue, 0. Each hardware queue will transmit all of the packets in its buffer before permitting the next
lower priority to transmit its packets. When the lowest hardware priority queue has finished transmitting
all of its packets, the highest hardware priority queue will begin transmitting any packets it may have
received.
The commands in the Command Line Interface (CLI) are listed (along with the appropriate parameters) in
the following table.
Command
config bandwidth_control
show bandwidth_control
config scheduling
show scheduling
config 802.1p user_priority
show 802.1p user_priority
config 802.1p default_priority
show 802.1p default_priority
config
scheduling_mechanism
show scheduling_mechanism
Each command is listed, in detail, in the following sections.
Parameters
<portlist>{rx_rate [ no_limit | <value 64-1000000>] |
tx_rate [ no_limit | <value 64-1000000>]}
{<portlist>}
<class_id 0-7> {max_packet <value 0-15>}
<priority 0-7> <class_id 0-7>
[<portlist> |all ] <priority 0-7>
{<portlist>}
[strict|weight_robin]
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