LACP 模式鏈路聚合：為了提高Eth-Trunk的容錯性，並且能提供備份功能，保證成員鏈路的高可靠性，出現了鏈路聚合控制協議LACP（Link Aggregation Control Protocol），LACP模式就是采用LACP 的一種鏈路聚合模式。
LACP為交換數據的設備提供一種標准的協商方式，以供設備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，自動調整或解散鏈路聚合。
1、拓撲圖
2、創建vlan，並將接口加入到vlan中
SWA
[SWA]vlan batch 101 102 Info: This operation may take a few seconds. Please wait for a moment...done. [SWA]int g0/0/1 [SWA-GigabitEthernet0/0/1]port link-type access [SWA-GigabitEthernet0/0/1]port default vlan 101 [SWA-GigabitEthernet0/0/1]quit [SWA]int g0/0/2 [SWA-GigabitEthernet0/0/2]port link-type access [SWA-GigabitEthernet0/0/2]port default vlan 102 [SWA-GigabitEthernet0/0/2]quit
SWB
[Huawei]sysname SWB [SWB]vlan batch 101 102 Info: This operation may take a few seconds. Please wait for a moment...done. [SWB]int g0/0/1 [SWB-GigabitEthernet0/0/1]port link-type access [SWB-GigabitEthernet0/0/1]port default vlan 101 [SWB-GigabitEthernet0/0/1]quit [SWB]int g0/0/2 [SWB-GigabitEthernet0/0/2]port link-type access [SWB-GigabitEthernet0/0/2]port default vlan 102 [SWB-GigabitEthernet0/0/2]quit
3、創建Eth-Trunk接口，設置為LACP模式，並將成員加入進來,同時將接口設置為trunk模式，允許vlan101和vlan102通過
SWA
[SWA]int Eth-Trunk 1 [SWA-Eth-Trunk1]mode lacp-static [SWA-Eth-Trunk1]trunkport GigabitEthernet 0/0/21 to 0/0/24 Info: This operation may take a few seconds. Please wait for a moment...done. [SWA-Eth-Trunk1]port link-type trunk [SWA-Eth-Trunk1]port trunk allow-pass vlan 101 102 [SWA-Eth-Trunk1]quit
SWB
[SWB]int Eth-Trunk 1 [SWB-Eth-Trunk1]mode lacp-static [SWB-Eth-Trunk1]trunkport GigabitEthernet 0/0/21 to 0/0/24 Info: This operation may take a few seconds. Please wait for a moment...done. [SWB-Eth-Trunk1]port link-type trunk [SWB-Eth-Trunk1]port trunk allow-pass vlan 101 102 [SWB-Eth-Trunk1]quit
4、配置SWA為LACP的主動端，將其優先級設為100，並配置活動接口上限為2，設置接口優先級確定初始活動鏈路。
SWA
[SWA]lacp priority 100 [SWA]int Eth-Trunk 1 [SWA-Eth-Trunk1]max active-linknumber 2 [SWA-Eth-Trunk1]quit [SWA]int g0/0/21 [SWA-GigabitEthernet0/0/21]lacp priority 100 [SWA-GigabitEthernet0/0/21]quit [SWA]int g0/0/22 [SWA-GigabitEthernet0/0/22]lacp priority 100 [SWA-GigabitEthernet0/0/22]quit
5、查看配置效果
21和22接口為活動接口，實現負載鏈路聚合。
同時23、24接口為備份接口，當21、22出現故障的時候立刻啟動備份鏈路，提高可靠性。
[SWA]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: 100 System ID: 4c1f-cc64-1d11 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 GigabitEthernet0/0/21 Selected 1GE 100 22 305 10111100 1 GigabitEthernet0/0/22 Selected 1GE 100 23 305 10111100 1 GigabitEthernet0/0/23 Unselect 1GE 32768 24 305 10100000 1 GigabitEthernet0/0/24 Unselect 1GE 32768 25 305 10100000 1 Partner: -------------------------------------------------------------------------------- ActorPortName SysPri SystemID PortPri PortNo PortKey PortState GigabitEthernet0/0/21 32768 4c1f-cc35-195e 32768 22 305 10111100 GigabitEthernet0/0/22 32768 4c1f-cc35-195e 32768 23 305 10111100 GigabitEthernet0/0/23 32768 4c1f-cc35-195e 32768 24 305 10110000 GigabitEthernet0/0/24 32768 4c1f-cc35-195e 32768 25 305 10110000 [SWA]
將21接口shutdown查看效果
[SWA]int g0/0/21 [SWA-GigabitEthernet0/0/21]shutdown [SWA-GigabitEthernet0/0/21]dis eth [SWA-GigabitEthernet0/0/21]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: 100 System ID: 4c1f-cc64-1d11 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 GigabitEthernet0/0/21 Unselect 1GE 100 22 305 10100010 1 GigabitEthernet0/0/22 Selected 1GE 100 23 305 10111100 1 GigabitEthernet0/0/23 Selected 1GE 32768 24 305 10111100 1 GigabitEthernet0/0/24 Unselect 1GE 32768 25 305 10100000 1 Partner: -------------------------------------------------------------------------------- ActorPortName SysPri SystemID PortPri PortNo PortKey PortState GigabitEthernet0/0/21 0 0000-0000-0000 0 0 0 10100011 GigabitEthernet0/0/22 32768 4c1f-cc35-195e 32768 23 305 10111100 GigabitEthernet0/0/23 32768 4c1f-cc35-195e 32768 24 305 10111100 GigabitEthernet0/0/24 32768 4c1f-cc35-195e 32768 25 305 10110000 [SWA-GigabitEthernet0/0/21]
切換時基本感受不到網絡變化。
讀書和健身總有一個在路上