Users Guide

Switch Management Commands 1993
Syntax
option code {ascii string1|hex[string1...string8]|ip[ip-address1...ip-
address8]}
no option code
• code—The DHCP TLV option code.
• ascii string1—An ASCII character string. Strings with embedded blanks
must be wholly contained in quotes.
• hex string1—A hexadecimal string containing the characters [0-9A-F].
The string should not begin with 0x. A hex string consists of two characters
which are parsed to fill a single byte. Multiple values are separated by
blanks.
• ip-address1—An IPv4 address in dotted decimal notation.
Default Configuration
There is no default option configured.
Command Mode
DHCP Pool Configuration mode
User Guidelines
The option information must match the selected option type and length.
Options cannot be longer than 255 characters in length. The option
information is conveyed in the TLV specified by the code parameter in the
DHCP OFFER, DHCP ACK, DHCP INFORM ACK and DHCP
BOOTREPLY messages.
Option 125 strings must conform to the relevant TLV format as specified in
RFC 3925 beginning with a 2 byte pad filled in by the switch (option code
125 and option length), the 2 byte enterprise number, the data length and the
sub-option values. For example, option 125 might be written on the
command line as:
option 125 hex 0000.02a2.1205.1061.7574.6f69.6e73.7461.6c6c.5f64.6863.70
which translates to:
• 0x0000 - Two byte pad filled in by switch (option-code 125 and option-len)
• 0x02A2 - Dell Vendor code 674