三层链路聚合口异常

大家好，

目前交换机有一个三层链路聚合口的一成员端口状态是UP/DOWN的

Route-Aggregation 100是核心交换机的上联口

<SW>dis link-aggregation verbose Route-Aggregation 100

Aggregate Interface: Route-Aggregation100

Aggregation Mode: Static 

Loadsharing Type: Shar

Management VLANs: None

  Port Status Priority Oper-Key

  GE1/3/0/48(R) S 10 9        

  GE2/3/0/48 U 100 9     

<SW>dis int gi 2/3/0/48 

GigabitEthernet2/3/0/48 

Current state: UP 

Line protocol state: DOWN(LAGG)

交换机配置如下：

<SW>dis cu int gi1/3/0/48

interface GigabitEthernet1/3/0/48

 port link-mode route

 mirroring-group 16 mirroring-port both

 link-aggregation port-priority 10

 port link-aggregation group 100

#

<SW>dis cu int gi2/3/0/48

interface GigabitEthernet1/3/0/48

 port link-mode route

 mirroring-group 16 mirroring-port both

 link-aggregation port-priority 100

 port link-aggregation group 100

#

供应商说是因为做了端口联动才显示DOWN，但我看配置好像又没什么特别

  link-aggregation port-priority 100 这条命令只是设置端口的优先级？

请问如何解决呢？谢谢！