实验

理解链路聚合的作用和配置

拓扑

此时存在拓扑存在环路，配置STP生成树，STP生成树通过阻塞端口破环，这样两条链路将不会工作，在此场景下有更好的方式解决，链路聚合，将GE0/0/1-3绑定为一根逻辑的链路，在传输流量时，以负载均衡的方式分担给三条链路，因为是逻辑上的一条链路，所以没有环，还不会环,接下来配置链路聚合，将三条链路合为一条逻辑链路

配置

配置LSW1和LSW2之间的链路为链路聚合

PC1配置，PC2参考PC1

LSW1配置

<Huawei>sys
[Huawei]sys LSW1
[LSW1]interface Eth-Trunk 1  \\创建一个逻辑口
[LSW1-Eth-Trunk1]mode manual load-balance   \\手工聚合模式（手动将成员接口加入），且开启负载均衡
[LSW1-Eth-Trunk1]trunkport GigabitEthernet 0/0/1 \\将物理接口绑定到逻辑口上
[LSW1-Eth-Trunk1]trunkport GigabitEthernet 0/0/2
[LSW1-Eth-Trunk1]trunkport GigabitEthernet 0/0/3

LSW2配置

<Huawei>sys
[Huawei]sys LSW2
[LSW2]inte Eth-Trunk 1
[LSW2-Eth-Trunk1]mode manual load-balance 
[LSW2-Eth-Trunk1]trunkport GigabitEthernet 0/0/1
[LSW2-Eth-Trunk1]trunkport GigabitEthernet 0/0/2
[LSW2-Eth-Trunk1]trunkport GigabitEthernet 0/0/3

验证

查看逻辑接口状态

[LSW1]dis interface Eth-Trunk 1
Eth-Trunk1 current state : UP
Line protocol current state : UP
Description:
Switch Port, PVID :    1, Hash arithmetic : According to SIP-XOR-DIP,Maximal BW:
 3G, Current BW: 3G, The Maximum Frame Length is 9216
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 4c1f-cc68-0339
Current system time: 2023-09-20 17:28:24-08:00
    Input bandwidth utilization  :    0%
    Output bandwidth utilization :    0%
-----------------------------------------------------
PortName                      Status      Weight
-----------------------------------------------------
GigabitEthernet0/0/1          UP          1      //链路状态都为UP，权重为1，根据权重负载均衡分配流量
GigabitEthernet0/0/2          UP          1
GigabitEthernet0/0/3          UP          1
-----------------------------------------------------
The Number of Ports in Trunk : 3
The Number of UP Ports in Trunk : 3

查看stp状态，可以发现三个接口被划分为一个逻辑接口，所以不会出现阻塞状态的接口，都处于工作状态

[LSW2]dis stp brief 
 MSTID  Port                        Role  STP State     Protection
   0    GigabitEthernet0/0/4        DESI  FORWARDING      NONE
   0    Eth-Trunk1                  ROOT  FORWARDING      NONE
[LSW1]dis stp brief 
 MSTID  Port                        Role  STP State     Protection
   0    GigabitEthernet0/0/4        DESI  FORWARDING      NONE
   0    Eth-Trunk1                  DESI  FORWARDING      NONE

PC1 ping PC2（通信正常）

PC>ping 192.168.1.2

Ping 192.168.1.2: 32 data bytes, Press Ctrl_C to break
From 192.168.1.2: bytes=32 seq=1 ttl=128 time=47 ms
From 192.168.1.2: bytes=32 seq=2 ttl=128 time=62 ms
From 192.168.1.2: bytes=32 seq=3 ttl=128 time=63 ms
From 192.168.1.2: bytes=32 seq=4 ttl=128 time=78 ms
From 192.168.1.2: bytes=32 seq=5 ttl=128 time=78 ms

--- 192.168.1.2 ping statistics ---
  5 packet(s) transmitted
  5 packet(s) received
  0.00% packet loss
  round-trip min/avg/max = 47/65/78 ms