Dell PowerConnect B - MLXe 4 Hardware Installation Guide - Page 139

Important software upgrade considerations 6 General upgrade considerations • The combined interface module FPGA image can exceed 32 MB, which is greater than the file size limit in older versions of TFTP server applications. Before using TFTP to transfer image files, be sure that you are using an updated TFTP server capable of handling larger file sizes. • In most cases boot and monitor images do not need to be upgraded, regardless of whether you are using the combined IronWare image, or are copying images to the management module and interface modules individually. Do not upgrade boot or monitor images unless you are explicitly instructed to do so in the upgrade instructions for the version you are using. • Hitless OS upgrades are only supported for upgrades within the same major software release. Hitless OS upgrades are not supported for upgrades from one major release to another major release. For more information about hitless upgrades, refer to "Hitless IS Upgrades". Special upgrade information for PowerConnect B-MLXe routers • PowerConnect B-MLXe routers require a minimum software release of R05.1.0. • In rare circumstances, you may receive management modules that are running Pre 5.1.0 code. In this instance, follow the instructions below to upgrade the management module and the MLXe router to R05.1.00. Interface module software upgrade considerations The following sections contain important upgrade information for interface modules. Interface module FPGA image upgrade considerations NOTE You must use FPGA images that are specified for PowerConnect B-MLXe series routers. Use of FPGA images intended for other products will render your chassis inoperable. The following rules apply when upgrading FPGA images on interface modules: • FPGA images on interface modules must be compatible with the software version running on the router. • You can upgrade FPGA images • individually, or upgrade all FPGA images using the combined FPGA image. • When you copy the • combined FPGA image from to the management module, the management module selects the FPGA images to be downloaded based on the types of interface modules installed and checks for duplicates before downloading the images. • The FPGA upgrade utility compar • es the FPGA image version currently installed to new images being downloaded. If the versions are identical, the download is aborted and a warning message is displayed. You can use the force-overwrite option with the FPGA upgrade command to override this feature. • The bundled FPGA image is more than 32 MB in size. If you are using a TFTP server, be sure that it is capable of handling larger file sizes. PowerConnect B-MLXe Hardware Installation Guide 127 53-1002111-01