I got a router interface configuration regarding LLQ and a concern came...
For the strict priority queue, there is only the command priority, without bandwidth amount.
I want to calculate the amount of available bandwidth for other classes when using bandwidth remaining command. If I do not know the bandwidth for priority queue, how can I calculate for others?
I saw also that there is a policy applied on priority queue. It makes sense, since the bandwidth defined for priority queue is a self policed (it is the nature of priority queue) and it is not configured, the police limits the traffic for priority queue, avoiding starvation.
priority <------- no definition for bandwidth
police 2000000 215000 215000 conform-action set-dscp-transmit ef exceed-action drop violate-action drop
By default, 25% is reserved.
Priority queue bandwidth is subtracted from the 75%.
The rest is available for other queues/classes
If I have a 1 mbps bandwidth... I will have 750 K available for QoS
If I define a police of 250 k on priority queue for normal burst and 350 k for exceeded, from my point of view, I will have dedicated a 350 k for priority queue and not 250. This is my thought because of the nature of priority queue (if there is traffic enough to use 300 K, it will not be policed until get 350 K).
My questions are:
When not defining the bandwidth for the priority queue, what is its limit?
If using police on priority queue, what will be the bandwidth available for other classes - will be the result of a subtration from the exceed value or the normal burst?
Thanks in advance!