User`s guide

®
USER’S GUIDE
Metered Rack PDU
46
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
• Boot Mode Transition. Tag 2, Len 1, Data 1/2
This option 43 setting enables or disables the option Remain in DHCP & BOOTP
mode after accepting TCP/IP settings, which, by default, is disabled.
– A data value of 1 enables the option Remain in DHCP & BOOTP mode after
accepting TCP/IP settings. Whenever the Rack PDU reboots, it will request its
network assignment first from a BOOTP server, and then, if necessary, from a
DHCP server.
– A data value of 2 disables the option Remain in DHCP & BOOTP mode after
accepting TCP/IP settings. The TCP/IP Configuration setting option switches to
DHCP when the Rack PDU accepts the DHCP response. Whenever the Rack PDU
reboots, it will request its network assignment from a DHCP server only.
Following, in hexadecimal format, is an example of a Vendor Specific Information
option that contains the APC cookie and the disabled Boot Mode Transition setting:
Option 43 = 0x01 0x04 0x31 0x41 0x50 0x43 0x02 0x01 0x01
TCP/IP options. The Rack PDU uses the following options within a valid DHCP
response to define its TCP/IP settings. All of these options except the first are
described in RFC2132.
• IP Address (from the yiaddr field of the DHCP response, described in RFC2131):
The IP address that the DHCP server is leasing to the Rack PDU.
• Subnet Mask (option 1): The Subnet Mask value that the Rack PDU needs to
operate on the network.
• Router, i.e., Default Gateway (option 3): The default gateway address that the Rack
PDU needs to operate on the network.
• IP Address Lease Time (option 51): The time duration for the lease of the IP
Address to the Rack PDU.
• Renewal Time, T1 (option 58): The time that the Rack PDU must wait after an IP
address lease is assigned before it can request a renewal of that lease.