User`s guide

DGS-3100 Gigabit Ethernet Switch Manual
78
12
QOS COMMANDS
The QoS commands in t Line Interface (CLI) are listed (along with the appropriate parameters) in
e following table.
he Command
th
Command Parameter
config sch <classeduling _id 0-3> max_packet <value 1-15>
show scheduling
config 802
user_prio
<prior
.1p
rity
ity 0-7> <class_id 0-3>
show 802.1p
user_priority
config 802.1p
default_priority
[<portlist> | all] <priority 0-7>
show 802.1p
default_priority
{<portlist>}
config
scheduling_mechanism
<class in] _id 0-3> [strict | round_rob
show
scheduling_mechanism
config rate_limit [<port 500-1000000>] list> | all] [disable | <value 3
show rate_limit [<portlist> | all]
Each comma detail, as
nd is listed in follows:
config scheduling
Purpose To configure traffic scheduling for each of the Switch’s QoS queues.
Syntax
config scheduling <class_id 0-3> max_packet <value 1-15>
Description The config scheduling command configures traffic scheduling for
The Switch contains four hardware classes of service. Incoming
s must be mapped to one of these four hardware queues.
This command is used to specify the rotation by which these four
ware queues are emptied.
e Switch’s default (if the config scheduling command is not
used, or if the config scheduling command is entered with the
max_packet set to 0) is to empty the hardware queues in order –
priority queue (hardware class 3) to the lowest
rdware class 0). Each hardware queue transmits
eue can again transmit any packets it may have
each of the Switch’s QoS queues.
packet
hard
Th
from the highest
priority queue (ha
all of the packets in its buffer before allowing the next lower priority
queue to transmit its packets. When the lowest hardware priority
queue has finished transmitting all of its packets, the highest
hardware priority qu