We have got complaints from users about low network performance. The users are behind newly deployed ERS 4900 switches with 10Gbps uplinks. After some investigation we have addressed it as a QoS issue. When queue-set other than 1 is set it is not possible to use the whole bandwidth of the access port. For example, if you set queue-set to 4, the speed of 1Gbps port is shaped to 250Mbps (1000/4) and it is not possible to reach higher speed. This problem can be reproduced only on switches with HW revision 03. We also have switches with HW02 and they behave correctly.
Is there anyone else experiencing the same issue?
As a workaround we set only one queue which technically disables QoS, but the users are much happier.