Why Increasing Buffer Credits Is Not A Cure For A Slow Drain Device
When I am working on performance problems, a frequent question I get is why increasing buffer credits for a particular port is not a fix for a slow drain device attached to that port. In this video, I explain the concept of congestion and illustrate why increasing the number of buffer credits is not a fix, without addressing the underlying cause of the congestion. There are some exceptions to this rule. The most common is when dealing with long-distance links, but that will be addressed in a future blog post (and perhaps a future video).
As always, you can leave feedback in the comments, or find me on LinkedIn or Twitter