ensp-链路聚合实验

链路聚合介绍

链路聚合特性:
虚拟技术的一种,将多个以太网链路捆绑为一条逻辑的以太网链路;
所有链路的带宽都可以充分用来转发两台设备之间的流量;
三层链路连接两台设备,可以起到节省IP地址的作用。

二层环境中多条上行链路:
ensp-链路聚合实验_第1张图片三层环境中部署有多条上行链路:
ensp-链路聚合实验_第2张图片ensp-链路聚合实验_第3张图片

链路聚合的模式

手动模式:将多条连接同一台交换机的端口都添加到这个Eth-Trunk当中,然后再在对端交换机上执行对应的操作;
LACP模式:根据协商协议建立起来的Eth-Trunk

手动模式Eth-Trunk使用故障链路外的其他链路执行负载分担

ensp-链路聚合实验_第4张图片缺点:手动模式Eth-Trunk可能因配置错误而无法正常通信
ensp-链路聚合实验_第5张图片

LACP模式的工作

选取主被动设备:双方交换机会使用系统优先级来判断谁充当两者中的LACP主动端;如双方系统优先级相同,则MAC地址较小的交换机会成为LACP主动端;

选取主备用链路:主动端交换机根据自身端口优先级来决定,端口优先级的数值越低,代表优先级越高。

LACP模式Eth-Trunk的主用链路和备用链路

ensp-链路聚合实验_第6张图片

链路聚合的配置

网络拓扑示意图:
ensp-链路聚合实验_第7张图片

在SW1和SW2上实施手动配置的链路聚合功能

SW1:

<Huawei>system-view 
[Huawei]sysname SW1
[SW1]interface Eth-Trunk 10
[SW1-Eth-Trunk10]trunkport Ethernet 0/0/1 to 0/0/3
[SW1-Eth-Trunk10]port trunk allow-pass vlan all

SW2:

<Huawei>system-view 
[Huawei]sysname SWB
[SWB]interface Eth-Trunk 10
[SWB-Eth-Trunk10]trunkport Ethernet 0/0/1 to 0/0/3
[SWB-Eth-Trunk10]port link-type trunk 
[SWB-Eth-Trunk10]port trunk allow-pass vlan all

在SW1上检查Eth-Trunk的配置和状态

[SW1]display eth-trunk 10
Eth-Trunk10'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 
Ethernet0/0/1                 Up          1      
Ethernet0/0/2                 Up          1      
Ethernet0/0/3                 Up          1 

在SW1和SW2上配置LACP

SW1:

[SW1]interface Eth-Trunk 20
[SW1-Eth-Trunk20]mode lacp-static
[SW1-Eth-Trunk10]trunkport Ethernet 0/0/1 to 0/0/3

SW2:

[SW2]interface Eth-Trunk 20
[SW2-Eth-Trunk20]mode lacp-static
[SW2-Eth-Trunk10]trunkport Ethernet 0/0/1 to 0/0/3

在SW1上检查Eth-Trunk的配置和状态

[SW1]display eth-trunk 20
Eth-Trunk20's state information is:
Local:
LAG ID: 20                  WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 32768      System ID: 4c1f-cc5e-760e                         
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
Ethernet0/0/1          Selected 100M     32768   2      5153    10111100  1     
Ethernet0/0/2          Selected 100M     32768   3      5153    10111100  1     
Ethernet0/0/3          Selected 100M     32768   4      5153    10111100  1     

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
Ethernet0/0/1          32768    4c1f-ccd8-5056  32768   2      5153    10111100
Ethernet0/0/2          32768    4c1f-ccd8-5056  32768   3      5153    10111100
Ethernet0/0/3          32768    4c1f-ccd8-5056  32768   4      5153    10111100

在SW1上设置LACP系统优先级并查看相关信息

[SW1]lacp priority 2000
[SW1]display eth-trunk 20
Apr 14 2020 09:11:04-08:00 SW1 DS/4/DATASYNC_CFGCHANGE:OID 1.3.6.1.4.1.2011.5.25
.191.3.1 configurations have been changed. The current change number is 7, the c
hange loop count is 0, and the maximum number of records is 4095.	
[SW1]display eth-trunk 20
Eth-Trunk20's state information is:
Local:
LAG ID: 20                  WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 2000       System ID: 4c1f-cc5e-760e     #这里优先级已经修改为2000                      
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
Ethernet0/0/1          Selected 100M     32768   2      5153    10111100  1     
Ethernet0/0/2          Selected 100M     32768   3      5153    10111100  1     
Ethernet0/0/3          Selected 100M     32768   4      5153    10111100  1     

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
Ethernet0/0/1          32768    4c1f-ccd8-5056  32768   2      5153    10111100
Ethernet0/0/2          32768    4c1f-ccd8-5056  32768   3      5153    10111100
Ethernet0/0/3          32768    4c1f-ccd8-5056  32768   4      5153    10111100

在SW1上设置LACP接口优先级并查看相关信息

[SW1]interface e0/0/1
[SW1-Ethernet0/0/1]lacp priority 1000
[SW1-Ethernet0/0/1]interface e0/0/2
[SW1-Ethernet0/0/2]lacp priority 2000
[SW1-Ethernet0/0/2]interface e0/0/3
[SW1-Ethernet0/0/3]lacp priority 3000
[SW1-Ethernet0/0/3]quit
[SW1]display eth-trunk 20
Eth-Trunk20's state information is:
Local:
LAG ID: 20                  WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 2000       System ID: 4c1f-cc5e-760e                         
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
Ethernet0/0/1          Selected 100M     1000    2      5153    10111100  1  # e/0/1接口优先级修改为1000    
Ethernet0/0/2          Selected 100M     2000    3      5153    10111100  1  # e/0/2接口优先级修改为2000     
Ethernet0/0/3          Selected 100M     3000    4      5153    10111100  1   # e/0/3接口优先级修改为3000    

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
Ethernet0/0/1          32768    4c1f-ccd8-5056  32768   2      5153    10111100
Ethernet0/0/2          32768    4c1f-ccd8-5056  32768   3      5153    10111100
Ethernet0/0/3          32768    4c1f-ccd8-5056  32768   4      5153    10111100

在SW1上设置Eth-Trunk 20中的活动接口数量并查看相关信息

[SW1]interface Eth-Trunk 20
[SW1-Eth-Trunk20]max active-linknumber 2
[SW1-Eth-Trunk20]quit
[SW1]display eth-trunk 20
Local:
LAG ID: 20                  WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 2000       System ID: 4c1f-cc5e-760e                         
Least Active-linknumber: 1  Max Active-linknumber: 2     # 活动接口的最大数量为2                    
Operate status: up          Number Of Up Port In Trunk: 2                     
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
Ethernet0/0/1          Selected 100M     1000    2      5153    10111100  1     
Ethernet0/0/2          Selected 100M     2000    3      5153    10111100  1     
Ethernet0/0/3          Unselect 100M     3000    4      5153    10100000  1   #  接口e0/0/3未被选中

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
Ethernet0/0/1          32768    4c1f-ccd8-5056  32768   2      5153    10111100
Ethernet0/0/2          32768    4c1f-ccd8-5056  32768   3      5153    10111100
Ethernet0/0/3          32768    4c1f-ccd8-5056  32768   4      5153    10110000

在SW1上禁用E0/0/1并查看Eth-Trunk状态

[SW1]display eth-trunk 20
Eth-Trunk20's state information is:
Local:
LAG ID: 20                  WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 2000       System ID: 4c1f-cc5e-760e                         
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
Ethernet0/0/1          Unselect 100M     1000    2      5153    10100010  1  # 接口e0/0/1未被选中其他两个接口已经被选中   
Ethernet0/0/2          Selected 100M     2000    3      5153    10111100  1     
Ethernet0/0/3          Selected 100M     3000    4      5153    10111100  1     

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
Ethernet0/0/1          0        0000-0000-0000  0       0      0       10100011
Ethernet0/0/2          32768    4c1f-ccd8-5056  32768   3      5153    10111100
Ethernet0/0/3          32768    4c1f-ccd8-5056  32768   4      5153    10111100

在SW1上配置LACP抢占功能并查看相关信息

[SW1]interface Eth-Trunk 20
[SW1-Eth-Trunk20]lacp preempt enable 
[SW1-Eth-Trunk20]lacp preempt delay 
[SW1-Eth-Trunk20]quit
[SW1]interface e0/0/1
[SW1-Ethernet0/0/1]undo shutdown 
[SW1-Ethernet0/0/1]quit
[SW1]display eth-trunk 20
Eth-Trunk20's state information is:
Local:
LAG ID: 20                  WorkingMode: STATIC                               
Preempt Delay Time: 10      Hash arithmetic: According to SIP-XOR-DIP   #preempt delay的时间为10      
System Priority: 2000       System ID: 4c1f-cc5e-760e                         
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
Ethernet0/0/1          Selected 100M     1000    2      5153    10111100  1     
Ethernet0/0/2          Selected 100M     2000    3      5153    10111100  1     
Ethernet0/0/3          Unselect 100M     3000    4      5153    10100000  1     

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
Ethernet0/0/1          32768    4c1f-ccd8-5056  32768   2      5153    10111100
Ethernet0/0/2          32768    4c1f-ccd8-5056  32768   3      5153    10111100
Ethernet0/0/3          32768    4c1f-ccd8-5056  32768   4      5153    10110000

在SW2上查看Eth-Trunk 20状态

[SW1]display eth-trunk 20
Eth-Trunk20's state information is:
Local:
LAG ID: 20                  WorkingMode: STATIC                               
Preempt Delay Time: 10      Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 2000       System ID: 4c1f-cc5e-760e                         
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
Ethernet0/0/1          Selected 100M     1000    2      5153    10111100  1  #发现与SW1连接的e0/0/1又重新被选择    
Ethernet0/0/2          Selected 100M     2000    3      5153    10111100  1     
Ethernet0/0/3          Unselect 100M     3000    4      5153    10100000  1     

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
Ethernet0/0/1          32768    4c1f-ccd8-5056  32768   2      5153    10111100
Ethernet0/0/2          32768    4c1f-ccd8-5056  32768   3      5153    10111100
Ethernet0/0/3          32768    4c1f-ccd8-5056  32768   4      5153    10110000

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