Cisco Cisco Packet Data Interworking Function (PDIF)
Software Management Operations
Configuring the Boot Stack ▀
ASR 5000 System Administration Guide, StarOS Release 18 ▄
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Configuring the Boot Stack
The boot stack consists of a prioritized listing of operating system software image-to-CLI configuration file
associations. These associations determine the software image and configuration file that gets loaded during system
startup or upon a reload/reboot. Though multiple associations can be configured, the system uses the association with
the highest priority. In the event that there is an error processing this association (for example, one of the files cannot be
located), the system attempts to use the association with the next highest priority. Priorities range from 1 to 100, with 1
being the highest priority. The maximum number of boot stack entries that may be configured in the boot.sys file is 10.
associations. These associations determine the software image and configuration file that gets loaded during system
startup or upon a reload/reboot. Though multiple associations can be configured, the system uses the association with
the highest priority. In the event that there is an error processing this association (for example, one of the files cannot be
located), the system attempts to use the association with the next highest priority. Priorities range from 1 to 100, with 1
being the highest priority. The maximum number of boot stack entries that may be configured in the boot.sys file is 10.
boot stack entries, the boot.sys file contains any configuration commands required to define the system boot method as
explained in the section that follows.
explained in the section that follows.
System Boot Methods
The local-boot method uses software image and configuration files stored locally on the system. Upon system startup or
reboot, the system looks on one of its local devices or /hd-raid located on the active SMC for the specific software
image and accompanying configuration text file. When using the local-booting method, you only need to configure boot
stack parameters.
reboot, the system looks on one of its local devices or /hd-raid located on the active SMC for the specific software
image and accompanying configuration text file. When using the local-booting method, you only need to configure boot
stack parameters.
The system can also be configured to obtain its software image from a specific external network server while it is paired
with a configuration text file that resides on the system. When using network booting, you need to configure the
following:
with a configuration text file that resides on the system. When using network booting, you need to configure the
following:
Boot stack parameters, which define the files to use and in what priority to use them
Boot interface and network parameters defining the SPIO management LAN interface and the methods to use to
reach the external network server
Network booting delay time and optional name server parameters defining the delay period (in seconds) to allow
for network communications to be established, and the IP address of any Domain Name Service (DNS) name
server that may be used
server that may be used
Viewing the Current Boot Stack
To view the boot stack entries contained in the boot.sys file run the Exec mode show boot command.
Important:
Operator and inspector-level users can execute the show boot command.
The examples below shows the command output for a local booting configuration. Notice that in these examples both
the image file (operating system software) and configuration file (CLI commands) are located on the /flash device.
the image file (operating system software) and configuration file (CLI commands) are located on the /flash device.
Important:
The StarOS image filename scheme changed with release 16.1. Pre-16.1, format =
“production.image.bin”. For 16.1 onwards, format = “asr5500-image_number.bin”. This change is reflected in the
examples provided below.
examples provided below.