二层聚合：
一、静态聚合
[SW]int Bridge-Aggregation 1
[SW-Ethernet1/0/1]port link-aggregation group 1
[SW-Ethernet1/0/2]port link-aggregation group 1
[SW-Bridge-Aggregation1]port link-type trunk
[SW-Bridge-Aggregation1]port trunk permit vlan all 必须先加入端口再起Trunk，要不然会出错
二、动态聚合
[SW]int Bridge-Aggaregation 1
[SW-Bridge-Aggregation1]link-aggregation mode dynamic
[SW-Ethernet1/0/1]port link-aggregation group 1
[SW-Ethernet1/0/2]port link-aggregation group 1
[SW-Bridge-Aggregation1]port link-type trunk
[SW-Bridge-Aggregation1]port trunk permit vlan all
查看命令：
display link-aggregation summary
[S1]display link-aggregation verbose
负载分担：
[S1]link-aggregation load-sharing mode destination-mac 两端都配置（貌似接口也可以配置）
三层聚合：
[R2]int Route-Aggregation 1
[R2-Route-Aggregation1]ip add 12.1.1.2 24
[R2]int g0/0
[R2-GigabitEthernet0/0]port link-aggregation group 1
[R2-GigabitEthernet0/0]int g0/1
[R2-GigabitEthernet0/1]port link-aggregation group 1
负载分担：
[R1]link-aggregation global load-sharing mode source-ip destination-ip基于源IP，目的IP
