端口聚合

端口聚合

端口聚合一般使用在交换机与交换机之间，解决交换机大量连接PC机，通过两个物理接口转发数据，只有2个接口，流量会非常大，负载高，还有可能堵塞，这时候就需要交换机把负载大的端口进行多个端口聚合，提高负载，说白了就是两个交换机之间接入多个接口，让交换机以为是一条线

聚合接口的数量，最多支持64个接口聚和

[SW3]int Eth-Trunk ?
  <0-63>  Eth-Trunk interface number

聚合的类型

• 静态端口聚合
  • 缺点：无法检测到对方是否配置，一方不配置数据无法发送，单向聚和没有用
  • 自己本地配置就显示up了，对端不管

[SW3-Eth-Trunk13]mode manual load-balance

• LACP协商，动态监测，动态端口聚合

添加需要聚合的端口

[SW3-Eth-Trunk13]trunkport g0/0/2

[SW3-Eth-Trunk13]dis eth-trunk 13
Eth-Trunk13'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: 1                     
--------------------------------------------------------------------------------
PortName                      Status      Weight 
GigabitEthernet0/0/2          Up          1

华为

练习静态端口聚合

把SW3和SW2上的端口进行聚合

SW3

[SW3]int Eth-Trunk 13

[SW3-Eth-Trunk13]mode manual load-balance 

[SW3-Eth-Trunk13]trunkport g0/0/2 
[SW3-Eth-Trunk13]trunkport g0/0/4

[SW3]dis eth-trunk    
Eth-Trunk13'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: 2                     
--------------------------------------------------------------------------------
PortName                      Status      Weight 
GigabitEthernet0/0/2          Up          1      
GigabitEthernet0/0/4          Up          1

SW2

[SW2]int Eth-Trunk 13

[SW2-Eth-Trunk13]mode manual load-balance 

[SW2-Eth-Trunk13]trunkport g0/0/2 
[SW2-Eth-Trunk13]trunkport g0/0/4

[SW2-Eth-Trunk13]dis eth-trunk    
Eth-Trunk13'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: 2                     
--------------------------------------------------------------------------------
PortName                      Status      Weight 
GigabitEthernet0/0/2          Up          1      
GigabitEthernet0/0/4          Up          1

再次查看stp

[SW2-Eth-Trunk13]dis stp bri
 MSTID  Port                        Role  STP State     Protection
   0    GigabitEthernet0/0/1        ROOT  FORWARDING      NONE
   0    GigabitEthernet0/0/3        DESI  FORWARDING      NONE
   0    Eth-Trunk13                 DESI  FORWARDING      NONE

[SW3]dis stp bri
 MSTID  Port                        Role  STP State     Protection
   0    GigabitEthernet0/0/1        ROOT  FORWARDING      NONE
   0    GigabitEthernet0/0/3        DESI  FORWARDING      NONE
   0    Eth-Trunk13                 ALTE  DISCARDING      NONE

练习LACP动态链路聚合

[SW3]int Eth-Trunk 13

[SW3-Eth-Trunk13]mode lacp-static

[SW3-Eth-Trunk13]trunkport g0/0/2

[SW3-Eth-Trunk13]trunkport g0/0/4

[SW3-Eth-Trunk13]dis eth-trunk 
Eth-Trunk13's state information is:
Local:
LAG ID: 13                  WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 32768      System ID: 4c1f-ccd9-1e52                         
Least Active-linknumber: 1  Max Active-linknumber: 8                          
Operate status: down        Number Of Up Port In Trunk: 0                     
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/2   Unselect 1GE      32768   3      3377    10100010  1     
GigabitEthernet0/0/4   Unselect 1GE      32768   5      3377    10100010  1     

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
GigabitEthernet0/0/2   0        0000-0000-0000  0       0      0       10100011
GigabitEthernet0/0/4   0        0000-0000-0000  0       0      0       10100011

[SW3]int Eth-Trunk 13

[SW3-Eth-Trunk13]mode lacp-static

[SW3-Eth-Trunk13]trunkport g0/0/2

[SW3-Eth-Trunk13]trunkport g0/0/4

[SW2-Eth-Trunk13]dis eth-trunk 
Eth-Trunk13's state information is:
Local:
LAG ID: 13                  WorkingMode: STATIC                               
Preempt Delay: Disabled     Hash arithmetic: According to SIP-XOR-DIP         
System Priority: 32768      System ID: 4c1f-ccaf-6722                         
Least Active-linknumber: 1  Max Active-linknumber: 8                          
Operate status: up          Number Of Up Port In Trunk: 2                     
--------------------------------------------------------------------------------
ActorPortName          Status   PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/2   Selected 1GE      32768   3      3377    10111100  1     
GigabitEthernet0/0/4   Selected 1GE      32768   5      3377    10111100  1     

Partner:
--------------------------------------------------------------------------------
ActorPortName          SysPri   SystemID        PortPri PortNo PortKey PortState
GigabitEthernet0/0/2   32768    4c1f-ccd9-1e52  32768   3      3377    10111100
GigabitEthernet0/0/4   32768    4c1f-ccd9-1e52  32768   5      3377    10111100

别忘记了，把eht-trunk 13接口改为trunk接口