Service Manual

• File server (required) — a network device for storing and servicing files.
• Domain name server (DNS) (optional) — a server that associates domain names in the network with IP
addresses.
• Relay agent (optional) — an intermediary network device that passes messages between the DHCP
clients and the DHCP server when the server is not on the same subnet. It can also provide IP addresses
for multiple subnets.
For more information, see Domain Name Server Settings and File Server Settings.
Industry Standard Upgrades with BMP
Dell Networking OS follows the Industry Standard Upgrades with BMP. Following are the steps to perform the
upgrade process:
1 The chassis loads in BMP mode.
2 The BMP_BOOT is a special variable in Nonvolatile Random Access Memory (NVRAM) for Industry
Standard Upgrade during BMP BOOT process.
3 The BMP_BOOT variable in NVRAM validates the presence of BOOT configuration.
4 If you did not configure BMP_BOOT variable, the system initiates the DHCP process and receives the
offer. However, if you did configure BMP_BOOT variable, the system applies and commits the BOOT
configurations present in the NORMAL_BOOT variable. Then, the system starts the DHCP process and
receives the offer.
5 The offer validates the presence of image file.
6 If the image file is present in the DHCP offer, the system validates the current active boot partition with
the DHCP offer image header.
7 If the image header matches, the system skips the image file download process and validates the
presence of configuration file in the offer.
8 If the image header mismatches, the system initiates the image upgrade process.
9 The system validates the BMP_BOOT variable in the NVRAM as part of the upgrade process. If you did
not configure BMP_BOOT variable, the system assigns the inactive boot partition to BMP_BOOT variable.
Then, it stores the copy of the current BOOT parameters in NORMAL_BOOT variable of NVRAM. It also
upgrades the image to the inactive boot partition.
10 The BMP process exits and the system cleans up the BMP_BOOT and NORMAL_BOOT variables, if the
configuration or script file is not present in the DHCP offer. However, if the configuration or script file is
present, download and apply the configuration or script file.
11 The system validates the auto-save BMP option. If you enabled the auto-save option, the system
commits the configuration changes and cleans up the BMP_BOOT variables and exits the BMP process.
If you disabled the
auto-save option, the changes to the configurations do not take effect. The system
cleans up the BMP_BOOT and NORMAL_BOOT variables and exits the BMP process.
Bare Metal Provisioning 19