S5560监控VLAN流量问题

S5560的G1/0/1口有2个VLAN，分别是VLAN 10和VLAN 20。我想snmp监控VLAN 10出入流量，话说只能通过流监控方式实现，我计划将G1/0/1对应监控VLAN 10镜像到G1/0/2口，用于监控G1/0/2口来确定流量。但我已经配置了对应的配置G1/0/2口还是没有流量，为什么呢？

一、流配置如下：

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traffic classifier mirror_vlan10 operator and

if-match customer-vlan-id 10

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traffic behavior mirror_vlan10

mirror-to interface GigabitEthernet1/0/1

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qos policy mirror_vlan10

classifier mirror_vlan10 behavior mirror_vlan10

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interface GigabitEthernet1/0/1

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10 20

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interface GigabitEthernet1/0/2

port link-mode bridge

port access vlan 20

undo stp enable

qos lr inbound cir 61440 cbs 3840000

qos lr outbound cir 61440 cbs 3840000

qos apply policy mirror_vlan235 inbound

qos apply policy mirror_vlan235 outbound

二、G1/0/2口本来是划VLAN 20通信。