交换机报stp错误，请求大佬分析原因
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问题描述：
2个核心交换机之间做 了m-lag，和他们的流量通过镜像端口发给交换机3，交换3再做镜像端口把流量传给审计设备，但一直报stp错误，关掉交换机3的2号口依然报错，这3台交换机都开了stp
组网及组网描述：
日志内容：
%Jan 14 09:56:50:359 2012 CQDZJ-WZLLFZQ-S6520X-01 STP/4/STP_DISPUTE: Instance 0's port Ten-GigabitEthernet1/0/1 received an inferior BPDU from a designated port which is in forwarding or learning state. The designated bridge ID contained in the BPDU is 32768.94a6-d8c7-6800, and the designated port ID contained in the BPDU is 128.40.
%Jan 14 09:56:50:360 2012 CQDZJ-WZLLFZQ-S6520X-01 STP/6/STP_DISCARDING: Instance 0's port Ten-GigabitEthernet1/0/1 has been set to discarding state.
%Jan 14 09:56:50:365 2012 CQDZJ-WZLLFZQ-S6520X-01 STP/6/STP_DISPUTE_RESTORATION: Instance 0's port Ten-GigabitEthernet1/0/1 exited the dispute state.
%Jan 14 09:56:50:365 2012 CQDZJ-WZLLFZQ-S6520X-01 STP/6/STP_FORWARDING: Instance 0's port Ten-GigabitEthernet1/0/1 has been set to forwarding state.
undo %Jan 14 09:56:51:357 2012 CQDZJ-WZLLFZQ-S6520X-01 STP/4/STP_DISPUTE: Instance 0's port Ten-GigabitEthernet1/0/1 received an inferior BPDU from a designated port which is in forwarding or learning state. The designated bridge ID contained in the BPDU is 32768.94a6-d8c7-6800, and the designated port ID contained in the BPDU is 128.45.
%Jan 14 09:56:51:357 2012 CQDZJ-WZLLFZQ-S6520X-01 STP/6/STP_DISCARDING: Instance 0's port Ten-GigabitEthernet1/0/1 has been set to discarding state.
%Jan 14 09:56:51:362 2012 CQDZJ-WZLLFZQ-S6520X-01 STP/6/STP_DISPUTE_RESTORATION: Instance 0's port Ten-GigabitEthernet1/0/1 exited the dispute state.
%Jan 14 09:56:51:363 2012 CQDZJ-WZLLFZQ-S6520X-01 STP/6/STP_FORWARDING: Instance 0's port Ten-GigabitEthernet1/0/1 has been set to forwarding state.
STP_DISPUTE
可能stp报文单通了，检查下vlan放行情况
交换机3interface Ten-GigabitEthernet1/0/1 port link-mode bridge description TO-HX-01 port link-type trunk undo port trunk permit vlan 1 port trunk permit vlan 4090 核心交换机1 interface Ten-GigabitEthernet2/0/9 port link-mode bridge description TO-jingxiang port link-type trunk undo port trunk permit vlan 1 port trunk permit vlan 4090 mirroring-group 1 monitor-egress 好像配置都一样
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交换机3interface Ten-GigabitEthernet1/0/1 port link-mode bridge description TO-HX-01 port link-type trunk undo port trunk permit vlan 1 port trunk permit vlan 4090 核心交换机1 interface Ten-GigabitEthernet2/0/9 port link-mode bridge description TO-jingxiang port link-type trunk undo port trunk permit vlan 1 port trunk permit vlan 4090 mirroring-group 1 monitor-egress 好像配置都一样