Edge-Core ECS4660-28F, Management Manual, Page: 1389 / 2020

C
HAPTER
41
| Class of Service Commands
Priority Commands (Layer 2)
– 1389 –
◆
Service time is shared at the egress ports by defining scheduling
weights for WRR, or for the queuing mode that uses a combination of
strict and weighted queuing. Service time is allocated to each queue by
calculating a precise number of bytes per second that will be serviced
on each round.
◆
The specified queue mode applies to all interfaces.
◆
Protocols used to synchronize distributed switches use packets of 1588
bytes to control the synchronization process. This switch therefore
assigns packets of this size to the highest priority queue to ensure
quick passage.
E
XAMPLE
The following example sets the queue mode to strict priority service mode:
Console(config)#queue mode strict
Console(config)#
R
ELATED
C
OMMANDS
queue weight (1389)
show queue mode (1391)
queue weight
This command assigns weights to the eight class of service (CoS) priority
queues when using weighted queuing, or one of the queuing modes that
use a combination of strict and weighted queuing. Use the no form to
restore the default weights.
S
YNTAX
queue weight weight0...weight7
no queue weight
weight0...weight7 - The ratio of weights for queues 0 - 7
determines the weights used by the WRR scheduler. (Range: 1-15)
D
EFAULT
S
ETTING
Weights 1, 2, 4, 6, 8, 10, 12, 14 are assigned to queues 0 - 7 respectively.
C
OMMAND
M
ODE
Interface Configuration (Ethernet, Port Channel)
C
OMMAND
U
SAGE
◆
This command shares bandwidth at the egress port by defining
scheduling weights for Weighted Round-Robin, or for the queuing mode
that uses a combination of strict and weighted queuing ( page 1388 ).
◆
Bandwidth is allocated to each queue by calculating a precise number
of bytes per second that will be serviced on each round.