Intel S1200SPL Technical Spesification page 70

Intel® Server Board S1200SP Family Technical Product Specification
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.
6.11.3.5.3 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.
6.11.3.5.4 DHCP-related LAN Configuration Parameters
Users may not change the following LAN parameters while the DHCP is enabled:
LAN configuration parameter 3 (IP Address)
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LAN configuration parameter 6 (Subnet Mask)
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LAN configuration parameter 12 (Default Gateway Address)
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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."
6.11.3.6 DHCP BMC Hostname
The BMC allows setting a DHCP Hostname using the Set/Get LAN Configuration Parameters command.
DHCP Hostname can be set regardless of the IP Address source configured on the BMC. But this parameter
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is only used if the IP Address source is set to DHCP.
When Byte 2 is set to Update in progress, all the 16 Block Data Bytes (Bytes 3 – 18) must be present in the
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request.
When Block Size is less than 16, it must be the last Block request in this series. In other words Byte 2 is
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equal to "Update is complete" on that request.
Whenever Block Size is less than 16, the Block data bytes must end with a NULL Character or Byte (=0).
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