Have you tried to clean the fibre? >W dniu 2018-08-22 o 13:45, Roger Lowe pisze: >> On Wed, 22 Aug 2018 12:16:53 +0200, R.S. <r.skoru...@bremultibank.com.pl> >> wrote: >> >>> Two FICON channels were connected to a switch. >>> Both signal an error "Invalid attachment failure" (this is visible on SE) >>> I checked port#, zoning, HCD/IODF and have no idea what to check futher. >>> z13 FICON Express16S, DCX8510-4 with 8Gbps SFP. >>> >>> >>> Any clue? >> Try invoking the 'Channel Problem Determination' task on the HMC. There are >> various options associated with that task and hopefully that might give you >> a clue where the issue(s) may lie. > >I did. All the options. >I see "Not valid" as the other node (that means switch port) with no >details, except port speed. >The switch show the port as not connected, although Statistics show some >frames were exchanged. >The only thing is connection rate. It is set to real value. Indeed, it >is FICON Ex16 to 8Gbps SFP, but I also enforced 4Gbps on switch side >and "Analyze Channel Information" shows actual speed. So, the speed >negotiation was done succesfully. Something bad happened after that. >
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