We are in the process of upgrading our 6509 switches from 12.2.18SXH3 to 12.2.33SXI1. The current image on the 6509E is System image file is "sup-bootdisk:s72033-ipservicesk9_wan-mz.122-33.SXH3.bin". We are looking to upgrade to 12.2(33)SXI1. I need the step by step process to upgrade this including what to avoid in the process. Any useful documentation will be good for me.