关于二层交换机链路汇聚

交换机A与B,C与D堆叠 ，
A堆叠 与 D堆叠 进行静态链路汇聚 ； A与D 有相同VLAN 10  20  30 
先进行A堆叠 1/0/51 to 1/0/52   与   D堆叠1/0/51 to 2/0/52 端口 ；

两边端口配置为[A-Bridge-Aggregation1]dis this 

# 

interface Bridge-Aggregation1 

 port link-type trunk 

 port trunk permit vlan all 

#

return 

 [D-Bridge-Aggregation1]dis this

 # 

interface Bridge-Aggregation1 

port link-type trunk 

port trunk permit vlan all 

# 

return 


A堆叠能够把2/0/51 to 2/0/52 配置进入 port link-aggregation group 1 中
 [A-if-range]dis this
#
interface Ten-GigabitEthernet2/0/51
 port link-mode bridge combo enable fiber
 port link-aggregation group 1

但是D堆叠加入时提示
[D-if-range]port link-aggregation group 1

 Can't assign the port to the aggregation group because its attribute configurations are different than the aggregate interface. 

Can't assign the port to the aggregation group because its attribute configurations are different than the aggregate interface.

这个知识点未学习到，希望大佬伸出援手帮小弟解答一二，谢谢！