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9Automatic Transfer Switch Installation and Quick Start

2. A properly configured DHCP server responds with a DHCP offer that includes all of the settings

that the Automatic Transfer Switch needs for network communication. The DHCP offer also

includes the Vendor Specific Information option (DHCP option 43). By default, the Automatic

Transfer Switch will ignore DHCP offers that do not encapsulate the APC cookie in the Vendor

Specific Information option using the following hexidecimal format:

Option 43 = 01 04 31 41 50 43

where

– the first byte (

01) is the code

– the second byte (

04) is the length

– the remaining bytes (

31 41 50 43) are the APC cookies

See your DHCP server documentation to add code to the Vendor Specific Information option.

To disable the APC cookie requirement or to change the control console DHCP Cookie Is

setting, use the Advanced option in the TCP/IP menu. See “Remote access to the control

console” on page 13.

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APC Automatic Transfer Switch Specifications

General