3802i connecting 2nd Ethernet to C2960X

[rschwart]

We are deploying 3802i's using Cisco C2960X's. When a lag the 2 ethernet ports on the switch the ap disconnects form the WLC. If I shut eth1 from the AP the device connects to the WLC. We really want to utilize both ethernet connections on the AP. Has anybody encountered this and been able to resolve it.

[Scott Fella]

It supported on the switch the switch you have:

How Does AUTO-Link Aggregation (LAG) work with the AP 2800 and AP 3800?
Both the 2800 and 3800 support LAG across their primary ethernet interfaces and AUX ports. This would provide 2Gbps of uplink to the access point. When operating in LAG, the 3800's multigigabit port will operate as a single GE port.
The following Cisco switching series support LAG with the APs:

Catalyst 3850 / all models (non‐CA mode)
Catalyst 3650 / all models (non‐CA mode)
Catalyst 4500/Sup‐8E
Catalyst 6500/Sup 720 or newer

-Scott 

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[rschwart]

We are using the C2960X in this deployment. The 2960 is not listed as supporting auto lag.So I am configuring a port channel per AP to support the 2 ethernet ports to the switch.

[Scott Fella]

Since it's not supported, it most likely will not work.

-Scott 

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[rschwart]

I have located the configuration document . The Cat 2960 does support the 3802i. Tjhis was very helpful in configuring the switch interfaces and port channels.

http://www.cisco.com/c/en/us/support/docs/wireless/aironet-3800-series-access-points/200898-Link-aggregation-on-1800-2800-3800-AP.html