[c-nsp] blackholed traffic on ether-channel

[Aaron DuShey]

Sorry for the earlier misfire.

On Wed, Apr 6, 2016 at 10:55 AM, selamat pagi <ketimun at gmail.com> wrote:

> Setup:
> 4 port LACP channel, C6880 <->  Nexus 7k
>
> Recently we had the issue that most (not all) traffic was black-holed on a
> C6880.
> No interface counters, nor the port-channel status, nor an NMS pointed to
> any abnormal behavior.
>
> Finally, the problem was resolved by shutting down a specific  interface on
> C6880.
> It seems that one defect port affected the function of the entire
> port-channel !!
>

FWIW We recently ran into a somewhat similar port-channel issue on 6880
15.2(1)SY1a. BU told us symptoms were possibly related to
CSCuw08272/CSCuy25743.
That issue is slated to be fixed in 15.2(1)SY2.
-Aaron