ensp 鏈路聚合--lacp模式（二層鏈路聚合）

LACP模式

是一種國際標准的協商方式，根據自身配置自動形成聚合鏈路並啟動聚合鏈路收發數據。聚合鏈路形成以后，LACP負責維護鏈路狀態，在聚合條件發生變化時，自動調整或解散聚合鏈路。

LACP模式名詞解釋

--系統優先級

--接口優先級

--成員接口備份

LACP基於標准協議802.3ad

 1 二層鏈路聚合

eth-trunk可以捆綁相同類型的端口，在一個二層交換機上，一般把接入層sw和分布層sw之間的鏈路做成二層鏈路聚合。保持端口參數一致。

 交換機操作

[sw1]vlan batch 10 20
[sw2]vlan batch 10 20

配置聚合模式

[sw1]interface Eth-Trunk 10
[sw1-Eth-Trunk10]mode lacp-static
[sw2]interface Eth-Trunk 10
[sw2-Eth-Trunk10]mode lacp-static

將接口加入聚合組10

[sw1-Eth-Trunk10]trunkport GigabitEthernet 0/0/1 to 0/0/3
[sw2-Eth-Trunk10]trunkport GigabitEthernet 0/0/1 to 0/0/3

查看結果

[sw1-Eth-Trunk10]display eth-trunk 10
Eth-Trunk10's state information is:
Local:
LAG ID: 10                  WorkingMode: STATIC  //靜態的LACP模式                            
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 32768      System ID: 4c1f-ccc7-4165                         
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      2609    10111100  1     
GigabitEthernet0/0/2   Selected 1GE      32768   3      2609    10111100  1     
GigabitEthernet0/0/3   Selected 1GE      32768   4      2609    10111100  1     

Partner:
---------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
GigabitEthernet0/0/1   32768    4c1f-cc53-798c  32768   2      2609    10111100
GigabitEthernet0/0/2   32768    4c1f-cc53-798c  32768   3      2609    10111100
GigabitEthernet0/0/3   32768    4c1f-cc53-798c  32768   4      2609    10111100

#max active-linknumber 2 //定義上限活動接口閾值為2

修改了最大活動鏈路的條目為2，現在有3條鏈路，所以要1條鏈路為非活動端口，默認端口號選G0/0/3處於非活動端口

#lacp priority 100 //修改系統LACP優先級，選擇主動發起端

[sw1]lacp priority 100
[sw1]display eth-trunk 10 //交換機s1成為了主動端
Eth-Trunk10's state information is:
Local:
LAG ID: 10                  WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 100        System ID: 4c1f-ccc7-4165                         
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      2609    10111100  1     
GigabitEthernet0/0/2   Selected 1GE      32768   3      2609    10111100  1     
GigabitEthernet0/0/3   Selected 1GE      32768   4      2609    10111100  1     

Partner:
---------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
GigabitEthernet0/0/1   32768    4c1f-cc53-798c  32768   2      2609    10111100
GigabitEthernet0/0/2   32768    4c1f-cc53-798c  32768   3      2609    10111100
GigabitEthernet0/0/3   32768    4c1f-cc53-798c  32768   4      2609    10111100

修改接口LACP優先級，選擇那些是活動接口，哪些是非活動接口

#int g 0/0/2

#lacp priority 100

#int g 0/0/3

#lacp priority 100 //接口優先級變為100

#inter eth-trunk 10

#lacp preempt enable //開啟搶占功能

#load-balance src-dst-mac //配置負載分擔方式