Users Guide

Auto Cong sequence

1 Create or modify the SCP le that congures the attributes of Dell servers.

2 Place the SCP le 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 le location in vendor-option 43 eld of DHCP server.

4 The iDRAC as part of acquiring IP address advertises vendor class identier iDRAC. (Option 60)

5 The DHCP server matches the vendor class to the vendor option in the dhcpd.conf le and sends the SCP le location and, if

specied the SCP le name to the iDRAC.

6 The iDRAC processes the SCP le and congures all the attributes listed in the le

DHCP options

DHCPv4 allows many globally dened parameters to be passed to the DHCP clients. Each parameter is known as a DHCP option. Each

option is identied 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 dening options.

The DHCP Option 43 is used to send information from the DHCP server to the DHCP client. The option is dened as a text string. This text

string is set to contain the values of the XML lename, 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 "domain.org";

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 le name in the string along with the credentials to the Remote File Share.

The DHCP Option 60 identies and associates a DHCP client with a particular vendor. Any DHCP server congured to take action based on

a client’s vendor ID should have Option 60 and Option 43 congured. With Dell PowerEdge servers, the iDRAC identies 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.