Default Gateway - Dell iDRAC 8 User Manual

1. The filename specified in DHCP option 60.
2. <ServiceTag>-config.xml — If a filename is not specified in DHCP option 60, use the system Service Tag to uniquely identify
the SCP file for the system. For example, CDVH7R1-config.xml
3. <Model number>-config.xml — If the option 60 filename is not specified and the <Service Tag>-config.xml file is not found,
use the system model number as the basis for the SCP file name to use. For example, R520-config.xml.
4. config.xml — If the option 60 filename, service tag-based, and model number-based files are not available, use the default
config.xml file.
NOTE: If none of these files are on the network share, then the server configuration profile import job is marked as failed
for file not found.
Related links
Auto Config sequence
DHCP options
Enabling Auto Config using iDRAC web interface
Enabling Auto Config using RACADM
Auto Config sequence
1. Create or modify the SCP file that configures the attributes of Dell servers.
2. Place the SCP file in a share location that is accessible by the DHCP server and all the Dell servers that are assigned IP address
from the DHCP server.
3. Specify the SCP file location in vendor-option 43 field of DHCP server.
4. The iDRAC as part of acquiring IP address advertises vendor class identifier iDRAC. (Option 60)
5. The DHCP server matches the vendor class to the vendor option in the dhcpd.conf file and sends the SCP file location and, if
specified the SCP file name to the iDRAC.
6. The iDRAC processes the SCP file and configures all the attributes listed in the file
DHCP options
DHCPv4 allows many globally defined parameters to be passed to the DHCP clients. Each parameter is known as a DHCP option.
Each option is identified with an option tag, which is a 1-byte value. Option tags 0 and 255 are reserved for padding and end of
options, respectively. All other values are available for defining options.
The DHCP Option 43 is used to send information from the DHCP server to the DHCP client. The option is defined as a text string.
This text string is set to contain the values of the XML filename, share location and the credentials to access the location. For
example,
option myname code 43 = text;
subnet 192. 168.0.0 netmask 255.255.255.0 {

# default gateway

option routers 192.168.0.1;
option subnet-mask 255.255.255.0;
option nis-domain
option domain-name "domain.org";
option domain-name-servers 192.168.1.1;
option time-offset -18000; #Eastern Standard Time
option vendor-class-identifier "iDRAC";
set vendor-string = option vendor-class-identifier;
option myname "-f system_config.xml -i 192.168.0.130 -u user -p password -n cifs -s 2 -
d 0 -t 500";
where, -i is the location of the Remote File Share and –f is the file name in the string along with the credentials to the Remote File
Share.
The DHCP Option 60 identifies and associates a DHCP client with a particular vendor. Any DHCP server configured to take action
based on a client's vendor ID should have Option 60 and Option 43 configured. With Dell PowerEdge servers, the iDRAC identifies
itself with vendor ID: iDRAC. Therefore, you must add a new 'Vendor Class' and create a 'scope option' under it for 'code 60,' and
then enable the new scope option for the DHCP server.
"domain.org";
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