4000 Router Series Fundamentals Configuration Guide

109

This procedure assumes that the main image set and the backup image set have feature packages and

patch packages. If an image set does not have feature packages or patch packages, the system can use

the image set to start up after the boot and system images pass verification.

If both of the main and backup boot images are invalid or unavailable, connect to the console port and

power cycle the device to access the Boot menu for loading a boot image. For more information about

downloading and loading a boot image, see the release notes for the software version.

After accessing the emergency shell, connect to the console port and load a system image so you can

access the Comware system. For more information about using the emergency shell, see "Using the

emergency shell."

Figure 42 Comware image loading procedure

System startup process

Upon power-on, the Boot ROM image runs to initialize hardware, and then the startup software images

run to start up the entire system, as shown in Figure 43. T

o access the Boot menu, press Ctrl + B within 4

seconds.