I'm having a bit of a trouble prioritizing some multicast traffic through a Nexus 3064 - basically I need ~700Mbps of multicast traffic entering Ethernet1/45 (speed 10G) to be sent without any drops to Ethernet1/16 (speed 1G) which gets congested from time to time. That traffic comes with IP precedence 4, so I assign that precedence to qos-group 1 on the ingress of E1/45, then put qos-group 1 in the priority queue on the egress of E1/16 - I must be missing something though since, although "show policy-map interface ethernet 1/45" shows incrementing matches for the relevant class-map, multicast traffic keeps getting dropped on E1/16 ("show queuing interface ethernet 1/16" shows the same number of dropped multicast pkts as "show interface ethernet 1/16" shows output discards).
I'm including the output of "show running-config ipqos", maybe someone can tell me what I'm missing... thank you.
version 7.0(3)I4(8a) class-map type qos match-any cqos-ipprec4 match precedence 4 class-map type queuing cque-ipprec4 match qos-group 1 policy-map type qos pqos-ipprec4 class cqos-ipprec4 set qos-group 1 class class-default policy-map type queuing pque-ipprec4 class type queuing cque-ipprec4 priority bandwidth percent 70 class type queuing class-default bandwidth percent 30 class-map type network-qos cnet-qos-group-1 match qos-group 1 policy-map type network-qos jumbo-frames class type network-qos class-default mtu 9216 policy-map type network-qos pnet-qos-groups class type network-qos cnet-qos-group-1 mtu 9216 class type network-qos class-default mtu 9216 system qos service-policy type network-qos pnet-qos-groups qos qos-policies statistics
interface Ethernet1/16 service-policy type queuing output pque-ipprec4
interface Ethernet1/45 service-policy type qos input pqos-ipprec4
It seems that qos-group 1 is somehow special (for example, WRED and ECN are not avaialble for it), so I changed it to qos-group 4. There is a difference (with qos-group 1 "show queuing interface e1/16" would report identical multicast counters for qos groups 0 and 1, while now they differ), but still traffic is only dropped from qos group 4 (which is supposed to be assigned to the priority queue):
# show interface ethernet 1/16 | i discard 0 input with dribble 0 input discard 0 lost carrier 0 no carrier 0 babble 2364 output discard
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