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1 JV1W_Arief_Hidayat commented Permalink

nice seb' <br />

2 youcangetabhi commented Permalink

Thanks Seb. This post definitely clears some things out about Slow drain devices. In a Cisco fabric, I am wondering how to detect the slow drain devices. There is this port monitor counter called "TX Credit not available" which is alerting everytime that value for a port reaches greater than 10. And I noticed that the ports that are getting that alert are all target ports on the same storage array. So what does that counter mean? Does that mean that array is a slow drain device? What should I do to fix it? Any help is greatly appreciated. Thanks in advance.

3 Hemant23 commented Permalink

I have routed fabrics in my environment. It is a dual fabric environment,cross site environment and both fabrics have exactly same configuration and number of devices attached. <div>&nbsp;</div> I have several c3 discards occuring only on one side and in one fabric, othe fabric is perfectly ok with zero c3 discards. <div>&nbsp;</div> we have done lots of setting chagnes, including QOS disabling on MAN and IFL links etc but nothing has helped so far. <br /> Any suggestions ?