Intel S1400FP Intel Server Board S1400FP Technical Product Specification - Page 81

DHCP BMC Hostname, 6.12.4 Address Resolution Protocol (ARP)

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Intel® Server Board S1400FP TPS Platform Management Functional Overview 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.  DHCP Hostname can be set regardless of the IP Address source configured on the BMC. But this parameter 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 request.  When Block Size < 16, it must be the last Block request in this series. In other words Byte 2 is equal to "Update is complete" on that request.  Whenever Block Size < 16, the Block data bytes must end with a NULL Character or Byte (=0).  All Block write requests are updated into a local Memory byte array. When Byte 2 is set to "Update is Complete", the Local Memory is committed to the NV Storage. Local Memory is reset to NULL after changes are committed.  When Byte 1 (Block Selector = 1), firmware resets all the 64 bytes local memory. This can be used to undo any changes after the last "Update in Progress".  User should always set the hostname starting from block selector 1 after the last "Update is complete". If the user skips block selector 1 while setting the hostname, the BMC will record the hostname as "NULL," because the first block contains NULL data.  This scheme effectively does not allow a user to make a partial Hostname change. Any Hostname change needs to start from Block 1.  Byte 64 ( Block Selector 04h byte 16) is always ignored and set to NULL by BMC which effectively means we can set only 63 bytes.  User is responsible for keeping track of the Set series of commands and Local Memory contents. While BMC firmware is in "Set Hostname in Progress" (Update not complete), the firmware continues using the Previous Hostname for DHCP purposes. 6.12.4 Address Resolution Protocol (ARP) The BMC can receive and respond to ARP requests on BMC NICs. Gratuitous ARPs are supported, and disabled by default. 6.12.5 Internet Control Message Protocol (ICMP) The BMC supports the following ICMP message types targeting the BMC over integrated NICs:  Echo request (ping): The BMC sends an Echo Reply.  Destination unreachable: If message is associated with an active socket connection within the BMC, the BMC closes the socket. Revision 1.0 69 Intel order number G64246-001

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Intel® Server Board S1400FP TPS
Platform Management Functional Overview
Revision 1.0
Intel order number G64246-001
69
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.
DHCP Hostname can be set regardless of the IP Address source configured on the BMC.
But this parameter 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 request.
When Block Size < 16, it must be the last Block request in this series. In other words Byte
2 is equal to “Update is complete” on that request.
Whenever Block Size < 16, the Block data bytes must end with a NULL Character or Byte
(=0).
All Block write requests are updated into a local Memory byte array. When Byte 2 is set to
“Update is Complete”, the Local Memory is committed to the NV Storage. Local Memory is
reset to NULL after changes are committed.
When Byte 1 (Block Selector = 1), firmware resets all the 64 bytes local memory. This can
be used to undo any changes after the last “Update in Progress”.
User should always set the hostname starting from block selector 1 after the last “Update
is complete”. If the user skips block selector 1 while setting the hostname, the BMC will
record the hostname as “NULL,” because the first block contains NULL data.
This scheme effectively does not allow a user to make a partial Hostname change. Any
Hostname change needs to start from Block 1.
Byte 64 ( Block Selector 04h byte 16) is always ignored and set to NULL by BMC which
effectively means we can set only 63 bytes.
User is responsible for keeping track of the Set series of commands and Local Memory
contents.
While BMC firmware is in “Set Hostname in Progress” (Update not complete), the firmware
continues using the Previous Hostname for DHCP purposes.
6.12.4
Address Resolution Protocol (ARP)
The BMC can receive and respond to ARP requests on BMC NICs. Gratuitous ARPs are
supported, and disabled by default.
6.12.5
Internet Control Message Protocol (ICMP)
The BMC supports the following ICMP message types targeting the BMC over integrated NICs:
Echo request (ping): The BMC sends an Echo Reply.
Destination unreachable: If message is associated with an active socket connection within
the BMC, the BMC closes the socket.