Prerequisites for FPD Image Upgrades
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You must install the FPD pie before you install the SMUs or Service Packs. If you install the SMU or Service Packs before the FPD pie, the FPDs on the line card may not upgrade. In such cases, you must remove the SMUs and Service Packs and reload the router.
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When upgrading ASR 9006 router from a 32-bit IOS-XR to 64‑bit IOS-XR, the corresponding RSPs and line cards must have ROMMON version 18.33 or later and a compatible FPD version (18.30 or later). If upgrading from a 32‑bit IOS XR release, an intermediate upgrade (for example, IOS XR 7.1.2) may be required to update the line card ROMMON and FPD before proceeding to newer 64‑bit IOS XR releases.

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