I am in the process of migrating to a new controller. My current controller is working fine and connects with a LAG configuration to a 2248FEX hanging off a 5548. My new controller is dropping packets when I ping the management interface from an AP and connects with a LAG configuration to a 2248FEX hanging off a 56128. What's interesting is when I ping a separate interface on the new controller I drop no packets and from the same AP I can ping my production controller and not drop packets. I have a ticket open with TAC and am getting poor response from him, so I thought I would put the question out to the PROS.
Here is my switch configuration which is identical for the production and new controller.
interface port-channel209
description PADC1-CWLC1
switchport mode trunk
switchport trunk native vlan 900
--------------------------------------------------------------------------------
Group Port- Type Protocol Member Ports
Channel
--------------------------------------------------------------------------------
209 Po209(SU) Eth NONE Eth102/1/9(P) Eth102/1/10(P) Eth120/1/9(P)
Eth120/1/10(P)
interface Ethernet102/1/9
description PADC1-CWLC1
switchport mode trunk
switchport trunk native vlan 900
channel-group 209
The only thing I think of is the code on the 56128 is doing something different than the 5548's. I can ping any other device on the same subnet as the new controller and not drop packets.
