Hi All,
I have a problem in understanding how LLQ is implemented in different platforms of Cisco.
Idealy QoS should kick in only when there is a congestion in the link irrespective of queueing / scheduling (LLQ and CBWFQ).
But in certain platforms like GSR and IOS-XR, LLQ is confiugred only with priority and police command not with "prioirity percent <value>" command. In priority and police command since policer is used, LLQ is always on even there is no period of congestion. Of course with police you can re-mark the exceed traffic to different marking but thats not the requirement in my case.
In platforms like 7206, LLQ is configured with "prioirty percent <value>" which works ideally only when there is a period of congestion. When there is no congestion, LLQ class can use scanvenge other classes as well.
Would like to know is there any specific reason why there is a difference in the implentation of LLQ between different platforms of Cisco.
thanks in advance
Arun