Configuring a Layer 2 dynamic aggregation group

Prerequisites

You must be in the global configuration context:switch(config)#

Procedure

Create a Layer 2 aggregate interface and access the Layer 2 aggregate interface view by entering:
```
switch(config)#接口延迟
```
The range of the LAG interface ID is 1 to 256.

While creating the Layer 2 aggregate interface, the system automatically creates a Layer 2 dynamic aggregation group numbered the same.
Set the operational state of every interface in the LAG to up by entering:
```
switch(config-lag-if)#no shutdown
```
NOTE:
This command does not impact the administrative state of the member interfaces because the command was entered at the level of the LAG. To change the administrative state of a member interface, enter the command at the interface level. For example:
```
switch(config)#interface 1/1/2switch(config-if)#no shutdown
```
On the 8320, 8325, 8360, and 8400, disable routing by entering:
```
switch(config-lag-if)#no routing
```
See theCommand-Line Interface Guidefor your switch and software version for more information about theno routingcommand.

NOTE:
On the 6100 and 6200 Switch Series, routing is not supported on physical interfaces.

On the 6300 and 6400 Switch Series, routing is disabled by default.

Configure the aggregation group to operate in dynamic mode by entering:

switch(config-lag-if)#lacp模式|{活跃passive}

For example:

switch(config-lag-if)#lacp mode active

Configure the aggregation group to operate in fast or slow mode by entering:
```
switch(config-lag-if)#lacp rate {fast | slow}
```
For example:
```
switch(config-lag-if)#lacp rate fast
```

Assign a native VLAN ID to a trunk interface by entering:

switch(config-lag-if)#vlan trunk native< vlan id >

For example:

switch(config-lag-if)#vlan trunk native 1

Use the following steps to add a maximum of 16 interfaces to the LAG:
1. To assign an interface to the LAG:
```
switch(config-lag-if)#interface
```
  To assign a range of interfaces to a LAG:
```
switch(config-lag-if)#interface-
```
  For example:
```
switch(config-lag-if)#interface 1/1/1-1/1/4
```
  See theCommand-Line Interface Guidefor your switch and software version for more information about theinterface command.
2. Assign an ID to the LAG:
```
switch(config-if)#lag
```
  For example:
```
switch(config-if-<1/1/1-1/1/4>)#lag 20
```
3. Set the administrative state of the member interface to up:
```
switch(config-if-<1/1/1-1/1/4>)#no shutdown
```

View the configuration by entering:

For 6100, 6200, 6300, and 6400 switch series:

switch(config-if-<1/1/1-1/1/4>)#show running-configCurrent configuration: ! vlan 1 interface lag 20 no shutdown vlan trunk native 1 vlan trunk allowed all lacp mode active lacp rate fast interface 1/1/1 no shutdown lag 20 switch(config-if-<1/1/1-1/1/4>)#show lacp aggregatesAggregate name : lag100 Interfaces : 1/1/3 1/1/1 1/1/4 1/1/2 Heartbeat rate : Fast Hash : l3-src-dst Aggregate mode : Active

For 8320, 8325, 8360, and 8400 switch series:

switch(config-if-<1/1/1-1/1/4>)#show running-configCurrent configuration: ! vlan 1 interface lag 20 no shutdown no routing vlan trunk native 1 vlan trunk allowed all lacp mode active lacp rate fast interface 1/1/1 no shutdown lag 20 switch(config-if-<1/1/1-1/1/4>)#show lacp aggregatesAggregate name : lag100 Interfaces : 1/1/3 1/1/1 1/1/4 1/1/2 Heartbeat rate : Fast Hash : l3-src-dst Aggregate mode : Active