Trying to understand this a little better. Cisco's documentation is not written in very clear english. Very frustrating trying to understand the threshold values as well as the shape versus share bandwidth values.
QOS. Cos 5 for queue 1 queue 2 queue 3 queue 4 0 similar to lab 2 . Queue one has the 25% of the bandwidth. other bandwidth is shared as 30 40 30. If the queue 2 is saturated by 60% then the cos 4 has to be dropped. Here is what I think it is. Can someone please correct me if i am wrong and provide any positive feedback. ! mls qos srr-queue output cos-map queue 2 threshold 2 4 !maps cos 4 to queue 2 and threshold 2 mls qos srr-queue output cos-map queue 4 threshold 1 0 !maps cos 0 to queue 4 mls qos queue-set output 1 threshold 2 40 60 100 200 ! when queue 2 threshold 2 exceeds 60% cos packets with cos 4 will be dropped mls qos ! ! interface GigabitEthernet1/0/1 description Office_912_lab_a switchport access vlan 48 switchport mode access switchport voice vlan 51 srr-queue bandwidth share 1 30 40 30 ! sets queues 2 - 4 to 30 40 30 srr-queue bandwidth shape 4 0 0 0 ! sets queue 1 to 25% of the link mls qos trust cos spanning-tree portfast
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