Understanding Slow Drain : Fibre Channel flow control - Part 1

Slow Drain is the highest point of concern for storage administrators. Still, it is one of the least understood problems. Watch the videos to understand the basic concept and full gamut of features provided by Cisco MDS switches for detection, troubleshooting and automatic recovery. Deploy these features today to have your own self-healing fabric.

[@bhanuakula5511]

Awesome explanation!! appreciate your way of explaining.

[@stargazer7644]

If no rrdy frames are coming back, how does the sender know it can send more than the 3 credits its neighbor has?

[@saintly_guy]

What if txb2b=0 counter frequently increases for 60minutes in ISLs due to some host reading data at high throughput across ISL?

[@reach2paresh]

This may be due to congestion at a edge-port, spreading to the ISL. Please refer to this detailed white paper: www.cisco.com/c/dam/en/us/products/collateral/storage-networking/mds-9700-series-multilayer-directors/whitepaper-c11-737315.pdf. Page 26 explains the methodology. Page 29 talks about your situation.

[@saintly_guy]

How to find latency in fabric???

[@stargazer7644]

This series is annoyingly useless. Why 4 videos? You can put in more than one fact per vid.