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USER’S GUIDE
Switched Rack PDU
116
TCP/IP options. The Switched Rack PDU uses the following options
within a valid DHCP response to define its TCP/IP settings:
• IP Address (from the yiaddr field of the DHCP response): Provides
the IP address that the DHCP server is leasing to the Rack PDU.
• Subnet Mask (option 1): Provides the subnet mask value needed by
the Rack PDU to operate on the network.
• Default Gateway (option 3): Provides the default gateway address
needed by the Rack PDU to operate on the network.
• Address Lease Time (option 51): Identifies the length of time for the
lease associated with the identified IP Address.
• Renewal Time, T1 (option 58): Identifies how long the Rack PDU must
wait after an IP address lease is assigned before it can request a
renewal of that lease.
• Rebinding Time, T2 (option 59): Identifies how long the Rack PDU
must wait after an IP address lease is assigned before it can seek to
rebind that lease.
Miscellaneous options. The Switched Rack PDU uses the following
options within a valid DHCP response to define NTP, DNS, hostname, and
domain name settings:
• NTP Server, Primary and Secondary (option 42): Identifies up to two
NTP servers that can be used by the Rack PDU.
• NTP Time Offset (option 2): Specifies the offset, in seconds, of the
subnet for the Rack PDU from Coordinated Universal Time (UTC).
• DNS Server, Primary and Secondary (option 6): Identifies one or two
DNS servers that can be used by the Rack PDU.
• Host Name (option 12): Identifies the hostname (maximum length of
32 characters) to be used by the Rack PDU.
• Domain Name (option 15): Identifies the domain name (maximum
length of 64 characters) to be used by the Rack PDU.