Script Execution Phase; Using Poweron Auto Provisioning - Cisco MDS 9000 Series Configuration Manual

Using PowerOn Auto Provisioning

The POAP Process
If none of the DHCP offers meet the requirements, the switch does not complete the DHCP negotiation (request
and acknowledgment), and no IP address is assigned. However, the POAP process is not aborted because the
switch reverts to the USB phase.
Figure 6: DHCP Discovery Process

Script Execution Phase

After the device bootstraps itself using the information in the DHCP acknowledgment, the script file is
downloaded from the TFTP server.
The switch runs the configuration script, which downloads and installs the software image and downloads a
switch-specific configuration file.
However, the configuration file is not applied to the switch at this point, because the software image that
currently runs on the switch might not support all the commands in the configuration file. After the switch
reboots, it begins to run the new software image, if any. At that point, the configuration is applied to the
switch.
Note If script execution fails, the DHCP discovery process restarts.
Cisco MDS 9000 Family NX-OS Fundamentals Configuration Guide
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