[c-nsp] blackholed traffic on ether-channel

[Aaron DuShey]

Aaron

> On 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 !!
> 
> Have you ever encountered a similar issue ?
> 
> How could these be monitored ?
> Would a ping across each link  be a recommended  approach (load-balance
> hashing would need to be considered)?
> 
> cheers, keti
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