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Cisco Wireless LAN Controller Configuration Guide
OL-9141-03
Chapter 3 Configuring Ports and Interfaces
Enabling Link Aggregation
Using the CLI to Enable Link Aggregation
Follow these steps to enable LAG on your controller using the CLI.
Step 1 Enter config lag enable to enable LAG.
Note Enter config lag disable if you want to disable LAG.
Step 2 Enter save config to save your settings.
Step 3 Reboot the controller.
Verifying LAG Settings Using the CLI
To verify the new LAG settings, enter show lag summary.
To show the physical port used for a specific MAC address, enter show lag eth-port-hash mac_address.
Use this command for Layer 2 packets (LWAPP Layer 2 mode).
To show the physical port used for a specific IP address, enter show lag ip-port-hash ip_address. Use
this command for Layer 3 packets (LWAPP Layer 3 mode).
Examples:
>show lag summary
LAG Enabled
>show lag eth-port-hash 00:0b:85:1b:e2:b0
Destination MAC 00:0b:85:1b:e2:b0 currently maps to port 2
>show lag ip-port-hash 10.9.4.128
Destination IP 10.9.4.128 currently maps to port 2
Configuring Neighbor Devices to Support LAG
The controller’s neighbor devices must also be properly configured to support LAG.
• Each neighbor port to which the controller is connected should be configured as follows:
interface GigabitEthernet <interface id>
switchport
channel-group <id> mode on
no shutdown
• The port channel on the neighbor switch should be configured as follows:
interface port-channel <id>
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan <native vlan id>
switchport trunk allowed vlan <allowed vlans>
switchport mode trunk
no shutdown
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