In Interlaken PHY IP Core, the Quartus II software reports minimum pulse width violations for Interlaken PHY design on the following clock signals:
altera_pcs|ilkn_pcs_10gbps_inst|sv_ilk_inst|bonded_lane_inst|inst_sv_xcvr_native[0].interlaken_inst|inst_sv_pma|rx_pma.sv_rx_pma_inst|rx_pmas[0].rx_pma.rx_pma_deser|clk90b
altera_pcs|ilkn_pcs_10gbps_inst|sv_ilk_inst|bonded_lane_inst|inst_sv_xcvr_native[0].interlaken_inst|inst_sv_pma|tx_pma.sv_tx_pma_inst|tx_pma_insts[0].sv_tx_pma_ch_inst|tx_pma_ch.tx_cgb|pclk[1]
These minimum pulse width violations are for false paths. Please ignore these paths. This issue has been fixed in Quartus II v12.0SP2 for Stratix V production device.