How Are Traffic Queues Defined?
For each queue, you can specify:
Minimum bandwidth guarantee: A percentage of the port's maximum
negotiated bandwidth reserved for the queue.
Scheduler type – strict/weighted:
Strict priority scheduling gives an absolute priority, with traffic in the
highest priority queues always sent first, and traffic in the lowest
priority queues always sent last.
Weighted scheduling requires a specification of priority for each
queue relative to the other queues, based on their minimum
Which Queue Management Methods Are Supported?
The switch supports the following methods, configurable per-interface-
queue, for determining which packets are dropped when the queue is full:
Taildrop: Any packet forwarded to a full queue is dropped regardless of its
Weighted Random Early Detection (WRED) drops packets selectively
based their drop precedence level. For each of four drop precedence levels
on each WRED-enabled interface queue, you can configure the following
Minimum Threshold: A percentage of the total queue size below
which no packets of the selected drop precedence level are dropped.
Maximum Threshold: A percentage of the total queue size above
which all packets of the selected drop precedence level are dropped.
Drop Probability: When the queue depth is between the minimum
and maximum thresholds, this value provides a scaling factor for
increasing the number of packets of the selected drop precedence level
that are dropped as the queue depth increases.