Does anyone know how CBWFQ scheduling really works - Cisco doesn't seem to share the low level details on this.
I have a situation where the class class-default is being starved by other queues.
I'm flooding a link with simulated UDP traffic that I have defined separate queues for (i.e. not in the class-default queue). This non class-default traffic is consuming almost 100% of the link. The traffic in the class-default queue is effectively being starved.
I have Flow based WFQ and WRED enabled on the class-default queue. But have tried all combinations of this without success.
According to Cisco docs the max-reserved-bandwidth 75, should ensure that 25% of the bandwidth is reserved for the class-default queue. This doesn't appear to work from my testing.