Cisco Nexus 5K's Tx Pause Frames with no Rx frames
I cannot answer your question but confirm what you are seeing. As far as I am aware of these Tx pause frames are send from the SP when it cannot catch up with switch. If you will re-act on the pause frames you have to activate flow-control on that particular interface. I would expect that the iSCSI protocol handles the session so that it doesn't loose any packets
It is local control packets between the SP's I/F and the Nexus I/F and the nexus hasn't got much buffering to pace a flow with.
We are seeing this behavior between nx5010 switches and EMC VNX5500 SAN. I don't think your disconnects have any thing to do with the pause frames.
Topology & Design:
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