I am trying to understand why the following SPECIFIC share/shape settings have been applied on a 3560, I understand some of the principles involved.
Outside of Call Signalling and Bearer traffic, all other traffic is default (0)
mls qos srr-queue output dscp-map queue 1 threshold 3 46
mls qos srr-queue output dscp-map queue 2 threshold 2 24 26
mls qos srr-queue output dscp-map queue 3 threshold 3 0
mls qos srr-queue output cos-map queue 3 threshold 3 0
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 2 3
ânon-voice portâ (port A)
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
âvoice portâ (port B)
srr-queue bandwidth share 1 70 25 5
srr-queue bandwidth shape 3 0 0 0
mls qos trust device cisco-phone
mls qos trust cos
I understand the traffic queue mapping, I understand the priority queue on voice ports.
Why share 60% to Q3 on port A, but only 25% on port B ?
Port B shares 70% to Q2, but if the majority of traffic is in Q3, why ?
Once voice is prioritised (where applicable) why are the other Q bandwidth allocations so different between the 2 switch ports ?
Are these AutoQOS settings / default settings ? I BELIEVE that there is no issue in practice (because only Q3 traffic would congest the interface anyway). Is this true ?