二层链路聚合配置
一、手工负载分担模式配置
（1）
LSW1:
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sysn LSW1
[LSW1]int eth-trunk 1 //创建编号为1的eth-trunk端口
[LSW1-Eth-Trunk1]mode ?
lacp-static Static working mode
manual Manual working mode
注意：eth-trunk工作模式分为手工负载分担模式和lacp模式两种
[LSW1-Eth-Trunk1]mode manual load-balance //配置为手工分钟分担模式
[LSW1-Eth-Trunk1]trunkport GigabitEthernet 0/0/1 to 0/0/3 //将物理端口G0/0/1,G0/0/2,G0/0/3加入eth-trunk 1 端口
[LSW1-Eth-Trunk1]dis eth-trunk 1 //查看eth-trunk端口信息
Eth-Trunk1's state information is:
WorkingMode: NORMAL Hash arithmetic: According to SIP-XOR-DIP
Least Active-linknumber: 1 Max Bandwidth-affected-linknumber: 8
Operate status: up Number Of Up Port In Trunk: 3
--------------------------------------------------------------------------------
PortName Status Weight
GigabitEthernet0/0/1 Up 1
GigabitEthernet0/0/2 Up 1
GigabitEthernet0/0/3 Up 1
（2）LSW2也需要同样的配置
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sysn LSW2
[LSW2]int eth-trunk 1
[LSW2-Eth-Trunk1]mode manual load-balance
[LSW2-Eth-Trunk1]trunkport GigabitEthernet 0/0/1 to 0/0/3
Info: This operation may take a few seconds. Please wait for a moment...
[LSW2-Eth-Trunk1]dis eth-trunk 1
Eth-Trunk1's state information is:
WorkingMode: NORMAL Hash arithmetic: According to SIP-XOR-DIP
Least Active-linknumber: 1 Max Bandwidth-affected-linknumber: 8
Operate status: up Number Of Up Port In Trunk: 3
--------------------------------------------------------------------------------
PortName Status Weight
GigabitEthernet0/0/1 Up 1
GigabitEthernet0/0/2 Up 1
GigabitEthernet0/0/3 Up 1
（3）
回显信息中WorkingMode: NORMAL ，表示eth-trunk1的工作模式为收工负载分担模式，eth-trunk1包含了3个成员端口G0/0/1,G0/0/2,G0/0/3，
此时，两台设备之间的三条物理链路聚合在一起，已绑定成为一条逻辑上的链路。
二、静态LACP模式配置
（1）删除LSW1和LSW2上的G0/0/1，G0/0/2和G0/0/3接口下的配置。
LSW1：
[LSW1]int g0/0/1
[LSW1-GigabitEthernet0/0/1]undo eth-trunk
[LSW1-GigabitEthernet0/0/1]int g0/0/2
[LSW1-GigabitEthernet0/0/2]undo eth-trunk
[LSW1-GigabitEthernet0/0/2]int g0/0/3
[LSW1-GigabitEthernet0/0/3]undo eth-trunk
[LSW1-GigabitEthernet0/0/3]q
[LSW1]
LSW2：
[LSW2]int g0/0/1
[LSW2-GigabitEthernet0/0/1]undo eth-trunk
[LSW2-GigabitEthernet0/0/1]int g0/0/2
[LSW2-GigabitEthernet0/0/2]undo eth-trunk
[LSW2-GigabitEthernet0/0/2]int g0/0/3
[LSW2-GigabitEthernet0/0/3]undo eth-trunk
[LSW2-GigabitEthernet0/0/3]q
[LSW2]
（2）创建eth-trunk端口，配置为lacp模式，将g0/0/1,g0/0/2,g0/0/3加入eth-trunk端口
LSW1：
[LSW1]int Eth-Trunk 1
[LSW1-Eth-Trunk1]mode lacp
[LSW1-Eth-Trunk1]trunkport GigabitEthernet 0/0/1 to 0/0/3
[LSW1-Eth-Trunk1]dis eth-trunk 1 //查看链路协商信息
Local:
LAG ID: 1 WorkingMode: STATIC //此处工作模式为lacp-static
Preempt Delay: Disabled Hash arithmetic: According to SIP-XOR-DIP
System Priority: 32768 System ID: 4c1f-cce2-765e
Least Active-linknumber: 1 Max Active-linknumber: 8 //默认的最大活动端口数
Operate status: down Number Of Up Port In Trunk: 0
--------------------------------------------------------------------------------
ActorPortName Status PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/1 Unselect 1GE 32768 2 305 10100010 1
GigabitEthernet0/0/2 Unselect 1GE 32768 3 305 10100010 1
GigabitEthernet0/0/3 Unselect 1GE 32768 4 305 10100010 1
Partner:
--------------------------------------------------------------------------------
ActorPortName SysPri SystemID PortPri PortNo PortKey PortState
GigabitEthernet0/0/1 0 0000-0000-0000 0 0 0 10100011
GigabitEthernet0/0/2 0 0000-0000-0000 0 0 0 10100011
GigabitEthernet0/0/3 0 0000-0000-0000 0 0 0 10100011
LSW2：
[LSW2]interface Eth-Trunk 1
[LSW2-Eth-Trunk1]mode lacp
[LSW2-Eth-Trunk1]trunkport GigabitEthernet 0/0/1 to 0/0/3
[LSW2-Eth-Trunk1]dis eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1 WorkingMode: STATIC
Preempt Delay: Disabled Hash arithmetic: According to SIP-XOR-DIP
System Priority: 32768 System ID: 4c1f-cc59-12d7
Least Active-linknumber: 1 Max Active-linknumber: 8
Operate status: up Number Of Up Port In Trunk: 3
--------------------------------------------------------------------------------
ActorPortName Status PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/1 Selected 1GE 32768 2 305 10111100 1
GigabitEthernet0/0/2 Selected 1GE 32768 3 305 10111100 1
GigabitEthernet0/0/3 Selected 1GE 32768 4 305 10111100 1
Partner:
--------------------------------------------------------------------------------
ActorPortName SysPri SystemID PortPri PortNo PortKey PortState
GigabitEthernet0/0/1 32768 4c1f-cce2-765e 32768 2 305 10111100
GigabitEthernet0/0/2 32768 4c1f-cce2-765e 32768 3 305 10111100
GigabitEthernet0/0/3 32768 4c1f-cce2-765e 32768 4 305 10111100
（3）修改最大活动端口数为2 ，使g0/0/1和g0/0/2处于select状态，g0/0/3处于unselect状态。
LSW1：
[LSW1]interface Eth-Trunk 1
[LSW1-Eth-Trunk1]max active-linknumber 2 //设置最大活动端口数为2
LSW2：
[LSW2]interface Eth-Trunk 1
[LSW2-Eth-Trunk1]max active-linknumber 2
查看：
[LSW1]dis Eth-Trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1 WorkingMode: STATIC
Preempt Delay: Disabled Hash arithmetic: According to SIP-XOR-DIP
System Priority: 32768 System ID: 4c1f-cce2-765e
Least Active-linknumber: 1 Max Active-linknumber: 2
Operate status: up Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
ActorPortName Status PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/1 Selected 1GE 32768 2 305 10111100 1
GigabitEthernet0/0/2 Selected 1GE 32768 3 305 10111100 1
GigabitEthernet0/0/3 Unselect 1GE 32768 4 305 10100000 1 //此处g0/0/3链路已处于unselect状态
Partner:
--------------------------------------------------------------------------------
ActorPortName SysPri SystemID PortPri PortNo PortKey PortState
GigabitEthernet0/0/1 32768 4c1f-cc59-12d7 32768 2 305 10111100
GigabitEthernet0/0/2 32768 4c1f-cc59-12d7 32768 3 305 10111100
GigabitEthernet0/0/3 32768 4c1f-cc59-12d7 32768 4 305 10100000
当g0/0/1或者g0/0/2的端口处于中断状态时，lacp将会自动协商，将g0/0/3转变为转发（select）状态，维持链路的正常，这就是lacp模式的作用
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三层链路聚合配置与二层链路聚合配置类似，假如在路由器上配置三层链路聚合，需要先创建Eth-Trunk接口，然
后在Eth-Trunk逻辑口上执行undo portswitch命令，把聚合链路从二层转为三层链路。执行undo portswitch命令后，可以为Eth-Trunk逻辑口
分配一个IP地址。
原文地址：http://blog.51cto.com/12184141/2148209