Router type R2611 and Version 1.74 Release 0107, Bootrom Version4.71. It is planned to upgrad to VRP174-R0119P02, Bootrom Version 7.08.
The bootrom version spans too much. According to upgrade guideline, it is required to upgrade 824X-BOOTROM-7.08-UPGRADE.BIN and restart router. Press ctrl+d and enter into bootrom upgrade menu. Upgrade bootrom through Xmoden and load it. Restart the device and it is found that bootrom version is still 4.71. Load 824X-BOOTROM-7.08.BIN in bootrom upgrade program and it still fails to start.
Enable ftp server on the router and load it with put 824X-BOOTROM-7.08.BIN bootromfull on DOS. Restart the router and upgrade bootrom to Version 7.08.