Hello @Farmah
Router1, fa0/1 should be the Gw of the Server0. You must have a subnet (/30) configured between Routeur0 Fa0/0 and Router1 Fa0/0. And another subnet (/30) between the L3 switch Fa0/6 and Router0 Fa0/1.
Also, you need to configure routing (static?) on your L3 Sw, Router 0 and Router1 to reach Server 0 from PC and from PC to Server 0.
Best regards
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