Customer Service Center

Environment/Versions Issue: B2B getting FCS Case 1 - Module: FX3-QSFP28-4 LR4 / AN-OFF / FEC-OFF) Speed: 100 G STC version: 5.05 LR4 Transceivers Source photonics - SPQCELRCDFB Finisar - FTLC1154RDPL Finisar - FTLC1151RDPL2  Case 2 - Module: MX3-100GQ-T2  LR4 / AN-OFF / FEC-OFF) Speed 100 G STC version: 5.11 LR4 Transceivers Finisar - FTLC1154RDPL Case 3 - Module MX3-100GQ-T2  (SR4) Speed 25G STC version: 5.29 SR4 Transceivers Avago - AFBR-89CDDZ-CS1 /AFBR-89CDDZ-CS1  Avago- SFBR-89CDDZ-CS5  Answer Case 1 - FX3-QSFP28-4 Cause: Auto-detect is causing FCS to appear as soon as traffic stream starts in LR4 / AN-OFF / FEC-OFF Solution 1: change to Manual - Optical Go to Port > Advanced  Under De-emphasis and Main tap swing Change to Manual Change to Optical Solution 2: change emphasis to 0/8/0 Go to Port > Advanced  Under De-emphasis and Main tap swing Change to Advanced Pre = 0, Post = 0, Main = 8 Case 2 - MX3-100GQ-T2 Cause: Output Amplitude from TestCenter is low.  Solution: Set hwmgrd to configure these optics with Rx Output Amplitude Control = 0x2 for all lanes. This required a patch at the time (v5.11) This has also been implemented into v5.15 Emphasis setting is set to Auto-Detect  Auto-Detect set the values to: Pre = 0, Post = 10, Main =8 Case 3 - MX3-100GQ-T2 Cause: The Avago optics were not transmitting with the ideal settings. it’s possible that it was using the settings from a different Avago transceiver.  Solution: Changed the config to manual/optical on all Avago ports and left the setup running traffic over the weekend.  Attachments Attachment test results summary.JPG Attachment Description CR4 and LR4 FEC results