09-15-2014 12:03 AM
I have Aruba IAP-255 access points. I'd like to have both ethernet ports on the AP available in a LAG, should one port go down, the other will take over.
I have Cisco 3750 switches that these Aruba AP's are connected too.
Is there any settings on the IAP's that I need to configure or change for the above to work?
09-15-2014 04:24 AM - edited 09-15-2014 04:25 AM
Currently the Cisco switch is set to "mode active', so we are using LACP.
On the Cisco switch, I can see the port channel is up. If I look at the Aruba AP, I can see that it has joined the LAG.
Why would the Cisco end need to be passive?
09-15-2014 01:16 PM
07-09-2015 09:38 AM
MAC flap happens until the port-channel comes up.
I would add one line of config to the port-channel to ensure the individual channel members don't go down when the port-channel doesn't negotiate. It's common for Cisco switches to down ports where no LACP neighbor is detected. "no port-channel standalone-disable" applied to the port-channel resolves this. The member will come up but as an individual link, which allows the AP to connect to the network and fetch its config.
Once the AP has its config it will try to negotiate LACP. As stated you have to use channel-group mode active, other modes will not work.