APC Battery Management System User Manual download pdf (Page 113)

USER’S GUIDE

Battery Management System

106

DHCP response options

Each valid DHCP response contains options that provide the TCP/IP

settings a Management Card needs to operate on a network and other

information that affects the Battery Management System’s operation.

The Management Card uses the Vendor Specific Information option (option

43) in a DHCP response to determine whether the DHCP response is valid.

Vendor Specific Information (option 43). The Vendor Specific

Information option contains up to two APC-specific options encapsulated in

TAG/LEN/DATA format: the APC cookie and the Boot Mode Transition.

APC Cookie. Tag 1, Len 4, Data “1APC”

Option 43 communicates to the Management Card that a DHCP server has

been configured to service APC devices. By default, the APC cookie must be

present in this DHCP response option before a Management Card can accept

the lease.

Following, in hexadecimal format, is an example of a Vendor Specific

Information option that contains the APC cookie:

Option 43 = 0x01 0x04 0x31 0x41 0x50 0x43

To disable the requirement of an APC cookie, see

Management Card settings for information on the DHCP

Cookie Is setting.

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APC Battery Management System User Manual Page 113