https://www.experts-exchange.com/questions/29114728/NEXUS-9000-queuing-or-shaping-foroutbound-traffic.html
https://networklessons.com/quality-of-service/policing-configuration-example
Hello,
cisco TAC have found the solution.
egress qos tcam need to be configured to make policy work
N9K1# show hardware access-list tcam region | i egr-l3
Egress L3/VLAN QOS [egr-l3-vlan-qos] size = 0 , policing cannot happen if this is 0
so we need configure tcam for egress
hardware access-list tcam region egr-racl 512
hardware access-list tcam region egr-l2-qos 512
hardware access-list tcam region egr-l3-vlan-qos 512
and reload the nexus
configure policy and interface :
policy-map type qos POLICE-10M
class class-default
police cir 10 mbps bc 1 mbytes conform transmit violate drop
interface Ethernet1/20
service-policy type qos output POLICE-10M no-stats
and it's works.