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LAG simplifies controller configuration because you no longer require to configure primary and secondary ports for each interface. If any of the controller ports fail, traffic is automatically migrated to one of the other ports. As long as at least one controller port is functioning, the system continues to operate, access points remain connected to the network, and wireless clients continue to send and receive data.
The CAPWAP LAG support feature is applicable for access points that support multiple ethernet ports for CAPWAP.
The 11AC APs with dual ethernet ports require the CAPWAP AP LAG support for data channel.
Cisco Aironet 1850, 2800, and 3800 Series APs' second Ethernet port is used as a link aggregation (LAG) port, by default. It is possible to use this LAG port as an RLAN port when LAG is disabled.
The following APs use LAG port as an RLAN port:
1852E
1852I
2802E
2802I
3802E
3802I
3802P
APs must be specifically enabled for CAPWAP AP LAG support.
CAPWAP data does not support IPv6.
Data DTLS must not be enabled when LAG is enabled.
APs behind NAT and PAT are not supported.
| Step 1 |
Choose . |
| Step 2 |
Check the AP LAG Mode check box. |
| Step 3 |
Click Apply. |
| Command or Action | Purpose | |||
|---|---|---|---|---|
| Step 1 |
configure terminal Example: |
Enters global configuration mode. |
||
| Step 2 |
ap lag support Example: |
Enables CAPWAP LAG support on the controller.
Thus, all APs with LAG capability reboots and joins the enabled CAPWAP LAG. |
||
| Step 3 |
end Example: |
Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode. |
If the CAPWAP LAG is enabled globally on the controller, the following occurs:
AP joins the controller.
AP exchanges its CAPWAP support.
LAG mode starts, if LAG is enabled on AP.
If the CAPWAP LAG is disabled globally on the controller, the following occurs:
AP joins the controller.
AP exchanges its CAPWAP support.
AP LAG config is sent to AP, if LAG is already enabled on AP.
AP reboots.
AP joins back with the disabled LAG.
| Step 1 |
Choose . |
| Step 2 |
Click Add. |
| Step 3 |
Under the General tab, enter the Name of the AP Profile and check the LAG Mode check box to set the CAPWAP LAG for the AP profile. |
| Step 4 |
Click Apply to Device. |
| Command or Action | Purpose | |||
|---|---|---|---|---|
| Step 1 |
configure terminal Example: |
Enters global configuration mode. |
||
| Step 2 |
ap profile ap-profile Example: |
Configures an AP profile and enters AP profile configuration mode.
|
||
| Step 3 |
lag Example: |
Enables CAPWAP LAG for an AP profile. |
||
| Step 4 |
end Example: |
Exits configuration mode and returns to privileged EXEC mode. |
| Command or Action | Purpose | |||
|---|---|---|---|---|
| Step 1 |
configure terminal Example: |
Enters global configuration mode. |
||
| Step 2 |
ap profile ap-profile Example: |
Configures an AP profile and enters AP profile configuration mode.
|
||
| Step 3 |
no lag Example: |
Disables CAPWAP LAG for an AP profile. |
||
| Step 4 |
end Example: |
Exits configuration mode and returns to privileged EXEC mode. |
| Command or Action | Purpose | |||
|---|---|---|---|---|
| Step 1 |
configure terminal Example: |
Enters global configuration mode. |
||
| Step 2 |
no ap lag support Example: |
Disables CAPWAP LAG support on the controller .
|
||
| Step 3 |
end Example: |
Exits configuration mode and returns to privileged EXEC mode. |
To verify the global LAG status for all Cisco APs, use the following command:
Device# show ap lag-mode
AP Lag-Mode Support Enabled
To verify the AP LAG configuration status, use the following command:
Device# show ap name <ap-name> config general
Cisco AP Identifier : 0008.3291.6360
Country Code : US
Regulatory Domain Allowed by Country : 802.11bg:-A 802.11a:-AB
AP Country Code : US - United States
::
AP Lag Configuration Status : Enabled/Disabled
Has AP negotiated lag based on AP capability and per AP config.
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