以太网链路聚合通过将多条以太网物理链路捆绑在一起形成一条以太网逻辑链路，实现增加链路带宽的目的，同时这些捆绑在一起的链路通过相互动态备份，可以有效地提高链路的可靠性。
静态链路聚合不需要交互LACP报文，参考端口以及选中端口只需要在本端设备上进行选择即可，不受网络环境的变化而影响，稳定性较高；但是可靠性低，无法感知对端连接链路的状态信息；例如本端设备静态聚合，对端未做聚合或者动态聚合；静态聚合侧为正常状态：
实验：
1、SW1------SW2，SW1上配置静态聚合，SW2上配置动态聚合，观察SW1与SW2上聚合组状态信息
SW1：
//聚合配置
interface Bridge-Aggregation100
port link-type trunk
port trunk permit vlan all
interface GigabitEthernet1/0/1
port link-mode bridge
port link-type trunk
port trunk permit vlan all
port link-aggregation group 100
#
interface GigabitEthernet1/0/2
port link-mode bridge
port link-type trunk
port trunk permit vlan all
port link-aggregation group 100SW2：
//聚合配置
interface Bridge-Aggregation100
port link-type trunk
port trunk permit vlan all
link-aggregation mode dynamic
interface GigabitEthernet1/0/1
port link-mode bridge
port link-type trunk
port trunk permit vlan all
port link-aggregation group 100
#
interface GigabitEthernet1/0/2
port link-mode bridge
port link-type trunk
port trunk permit vlan all
port link-aggregation group 100
聚合组状态信息查看：
//SW1上查看链路聚合组成员状态：发现全部为选中端口状态
[SW1]dis link-aggregation verbose Bridge-Aggregation 100
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing
Port Status: S -- Selected, U -- Unselected, I -- Individual
Port: A -- Auto port, M -- Management port, R -- Reference port
Flags: A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,
D -- Synchronization, E -- Collecting, F -- Distributing,
G -- Defaulted, H -- Expired
Aggregate Interface: Bridge-Aggregation100
Aggregation Mode: Static
Loadsharing Type: Shar
Management VLANs: None
Port Status Priority Oper-Key
GE1/0/1(R) S 32768 1
GE1/0/2 S 32768 1
//SW2上查看链路聚合组成员状态：发现当动态链路聚合与静态链路对接时只有端口ID较小的端口成为选中端口，其余端口为非选中端口
[SW2]dis link-aggregation verbose Bridge-Aggregation 100
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing
Port Status: S -- Selected, U -- Unselected, I -- Individual
Port: A -- Auto port, M -- Management port, R -- Reference port
Flags: A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,
D -- Synchronization, E -- Collecting, F -- Distributing,
G -- Defaulted, H -- Expired
Aggregate Interface: Bridge-Aggregation100
Creation Mode: Manual
Aggregation Mode: Dynamic
Loadsharing Type: Shar
Management VLANs: None
System ID: 0x8000, 9acb-6b6b-0200
Local:
Port Status Priority Index Oper-Key Flag
GE1/0/1(R) S 32768 1 1 {ACDEFG}
GE1/0/2 U 32768 2 1 {ACG}
Remote:
Actor Priority Index Oper-Key SystemID Flag
GE1/0/1 32768 0 0 0x8000, 0000-0000-0000 {DEF}
GE1/0/2 32768 0 0 0x8000, 0000-0000-0000 {DEF}2、SW1------SW2，SW1上配置静态聚合，SW2不配置聚合，观察SW1上聚合组状态信息
SW1：
//聚合配置
interface Bridge-Aggregation100
port link-type trunk
port trunk permit vlan all
interface GigabitEthernet1/0/1
port link-mode bridge
port link-type trunk
port trunk permit vlan all
port link-aggregation group 100
#
interface GigabitEthernet1/0/2
port link-mode bridge
port link-type trunk
port trunk permit vlan all
port link-aggregation group 100聚合组状态信息查看：
//可以发现在本端配置为静态聚合，对端未配置聚合时，静态聚合侧也是能正常将成员端口设为选中端口的。
[SW1]dis link-aggregation verbose Bridge-Aggregation 100
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing
Port Status: S -- Selected, U -- Unselected, I -- Individual
Port: A -- Auto port, M -- Management port, R -- Reference port
Flags: A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,
D -- Synchronization, E -- Collecting, F -- Distributing,
G -- Defaulted, H -- Expired
Aggregate Interface: Bridge-Aggregation100
Aggregation Mode: Static
Loadsharing Type: Shar
Management VLANs: None
Port Status Priority Oper-Key
GE1/0/1(R) S 32768 1
GE1/0/2 S 32768 1
由如上实验可得知：
1、静态聚合稳定性高，不关注对端网络设备的环境变化以及配置信息
2、静态聚合可靠性低，因为他不关注对端网络环境的变化导致如对端链路异常或者环境变化而导致网络异常，可以通过联动BFD的方式实现对对端链路故障变化快速检测
