If you do not explicitly specify the IP address of the default router in the Provision OS profile, OSP will use the IP address of installation server to create a /etc/defaultrouter file.
Workaround: Specify the IP address of the default router in the Provision OS Profile or modify the /etc/defaultrouter file to make it point to the correct router information and reboot the system.
EIS compliance requires the /etc/defaultrouter file to be present.