We're seeing these errors on the 40G link between cr2-esams (MX480) and asw-esams (QFX5100):

Nov 10 14:16:26  re0.cr2-esams fpc0 qsfp-0/2/0 failed to init hw
Nov 10 14:16:27  re0.cr2-esams fpc0 qsfp_tk_write_repeated_value: qsfp-0/2/0 failed to write block at addr 0x64  data 0x13e72aa8 err 1

This is basically the same as T92616. Since we're seeing it in a very similar but still different setup now too and since replacing this link with fibers is expensive, it'd be nice to know once and for all if this is a supported configuration or not.

A Juniper case will be opened about this, so hopefully we can have our answer (and possibly, a fix) soon.