7506 二层静态端口聚合总是提示有环路

核心交换机：

 link-aggregation global load-sharing mode destination-ip source-ip 

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interface Bridge-Aggregation89

 description "2haolou"

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 3999

 undo stp enable

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interface Ten-GigabitEthernet1/3/0/3

 port link-mode bridge

 description ** 2#4F H3C 7503 10.250.31.243 **

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 3999

 undo stp enable

 mirroring-group 2 mirroring-port both

 port link-aggregation group 89

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interface Ten-GigabitEthernet2/3/0/3

 port link-mode bridge

 description ** 2#4F H3C 7503 2/0/48 **

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 3999

 shutdown

 undo stp enable

 mirroring-group 4 mirroring-port both

 port link-aggregation group 89

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2号楼交换机：

interface Bridge-Aggregation100

 description *WAN-S7510*

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 4094

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interface Ten-GigabitEthernet2/0/47

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 4094

 port link-aggregation group 100

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interface Ten-GigabitEthernet2/0/48

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 4094

 port link-aggregation group 100

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设备配置检查没有发现异常，确提示有环路。想知道怎么检查确认。或者其他方法决绝。