Unable to link up when connected to the 100G switch

The two THOR devices can link up to the 100G , but the speed is insufficient. Now, when each THOR is connected to the 100G switch, they cannot link up. The opposite switch works fine with the same optical modules and cables when performing a 100G loopback. Is it possible that the insufficient speed is affecting auto-negotiation, preventing a normal link up?

i have try to close the fec from the switch , there is no improvement too.

i have solve it ,thank you

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