Technical Product Specification

Platform Management Functional Overview Intel® Server Board S1400FP TPS
68 Intel order number G64246-003 Revision 2.0
2. The user may only set a default gateway address that can potentially exist within the
subnet specified above. Default gateway addresses outside the BMC’s subnet are
technically unreachable and the BMC will not set the default gateway address to an
unreachable value. The BMC returns a 0xCC (Invalid Data Field in Request) completion
code for default gateway addresses outside its subnet.
3. If a command is issued to set the default gateway IP address before the BMC’s IP
address and subnet mask are set, the default gateway IP address is not updated and the
BMC returns 0xCC.
If the BMC’s IP address on a LAN channel changes while a LAN session is in progress over that
channel, the BMC does not take action to close the session except through a normal session
timeout. The remote client must re-sync with the new IP address. The BMC’s new IP address is
only available in-band through the Get LAN Configuration Parameters command.
6.12.3.5.3 Enabling/Disabling Dynamic Host Configuration (DHCP) Protocol
The BMC DHCP feature is activated by using the Set LAN Configuration Parameter command
to set LAN configuration parameter 4, IP Address Source, to 2h: “address obtained by BMC
running DHCP”. Once this parameter is set, the BMC initiates the DHCP process within
approximately 100 ms.
If the BMC has previously been assigned an IP address through DHCP or the Set LAN
Configuration Parameter command, it requests that same IP address to be reassigned. If the
BMC does not receive the same IP address, system management software must be
reconfigured to use the new IP address. The new address is only available in-band, through the
IPMI Get LAN Configuration Parameters command.
Changing the IP Address Source parameter from 2h to any other supported value will cause the
BMC to stop the DHCP process. The BMC uses the most recently obtained IP address until it is
reconfigured.
If the physical LAN connection is lost (that is, the cable is unplugged), the BMC will not re-
initiate the DHCP process when the connection is re-established.
6.12.3.5.4 DHCP-related LAN Configuration Parameters
Users may not change the following LAN parameters while the DHCP is enabled:
 LAN configuration parameter 3 (IP Address)
 LAN configuration parameter 6 (Subnet Mask)
 LAN configuration parameter 12 (Default Gateway Address)
To prevent users from disrupting the BMC’s LAN configuration, the BMC treats these
parameters as read-only while DHCP is enabled for the associated LAN channel. Using the Set
LAN Configuration Parameter command to attempt to change one of these parameters under
such circumstances has no effect, and the BMC returns error code 0xD5, “Cannot Execute
command. Command, or request parameter(s) are not supported in present state.”
6.12.3.6 DHCP BMC Hostname
The BMC allows setting a DHCP Hostname using the Set/Get LAN Configuration Parameters
command.