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MAC Address

5

Subnet Mask

6

IPv4 Header Parms

7

48

Parameter IP Address Source

CHAPTER 3. IPMI INTERFACES

Table 3.16: LAN Configuration Parameters

# 4

Description One byte field telling the BMC where to get its IP address. Bits 4-7 are reserved. Values for bits 0-3 are:

As you probably can tell, static address and DHCP are really the only useful values. A 6 byte field. This is the Ethernet Media Access Code? (MAC) ad- dress to use as the source when transmitting packets, in network order. You must set this value properly. A 4 byte field holding the subnet mask for the IP connection, in network order. A 3 byte field controlling some parameters in the IP header. The bytes are: byte 0 - time to live (default 40h) - The number of network hops allowed for IP packets sent by the BMC. byte 1 bits 0-4 - reserved bits 5-7 - flags. Sets the of the flags field in the IP header. The default value is 010b, or do not fragment. byte 2 This is the setting of the 8-bit type of service field in the IP header. Only one of bits 1-4 should be set. bit 0 - unused, set to zero. bit 1 - minimize monetary cost bit 2 - maximize reliability bit 3 - maximize throughput bit 4 - minimize delay bits 5-7 - Precedence, which is unused by IP systems now. The default value is 00010000b.

0 1 2 3 4

  • -

    unspecified (I don’t know what that means)

  • -

    static address, configured from parameter 3

  • -

    get address from DHCP

  • -

    get address from BIOS or system software

  • -

    get address by some other method

Primary RMCP port number (optional) Secondary RMCP port number (op- tional)

8

9

A 2 byte field holding the UDP port number to use for primary RMCP. Default value is 623. A 2 byte field holding the UDP port number to use for the secure aux bus RMCP port. IPMI does not use this, but it is here for complete- ness. Default value is 664.

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