Address Resoluton Protocol (Arp) - Intel S2600CO series User Manual

Platform Management Functional Overview
6.10.3.5.4 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."
6.10.3.6 DHCP BMC Hostname
The BMC allows setting a DHCP Hostname using the Set/Get LAN Configuration Parameter
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 "Upgrade 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 purpose.
6.10.4

Address Resoluton Protocol (ARP)

The BMC can receive and respond to ARP requests on BMC NICs. Gratuitous ARPs supported,
and disabled by default.
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Intel order number G42278-004
Intel® Server Board S2600CO Family TPS
Revision 1.4