Supported DHCP Server Options for ZTP

Table 1 lists the supported DHCP server options for ZTP.

Table 1. Supported DHCP Server Options for ZTP

Options

DHCP IPv4 Option

IPv4 Comments

DHCP IPv6 Option

IPv6 Comments

Subnet mask

Option 1

—

—

—

Router

Option 3

Default gateway

—

—

DNS server

Option 6

DNS server

—

—

Lease time

Option 51

Must be infinite

—

—

Server address

Option 54

Identifies the DHCP server

—

—

Classless static route

Option 121

Used to install static routes

—

—

NTP server 1

Option 42

—

Option 56

—

TFTP server name

Option 66

Server IP address

—

—

Bootfile name

Option 67

URL of the file

Can be used without Option 66, in which case it contains the server name and the URL

Option 59

Server name and URL of the file

Vendor-specific options

(See Nokia-specific TLV)

Option 43

Nokia proprietary file location

Can be used instead of Options 66 or 67, but Options 66 and 67 take precedence over Option 43

Option 17

Nokia proprietary file location

Can be used instead of Option 59, but Option 59 takes precedence over Option 17

1 When the node is running in ZTP mode, the date and time are set by NTP. This information is required for HTTPs certificate verification, and to record date and time stamps in events and logs.