Nomadix AG 2300, Руководство пользователя, Страница: 70 / 294

A
CCESS
G
ATEWAY
58 Installing the Access Gateway
Option Description Option Code
Sequence of 1 or more octets 43
Ascii string of 1 or more printable characters 12, 14, 17-18, 40, 47, 64, 66-67
Disallowed options: Some option codes are not allowed, for one of the following reasons:

Items that are already configured elsewhere as a separate DHCP pool or NSE configuration
parameter, and/or are derived from one that is. Includes options 1 (subnet mask), 3 (router), 6
(domain name server), 15 (domain name), 51 (lease time), 54 (server identifier), 58 (renewal time),
59 (rebinding time).

Items not valid in a DHCP offer or ACK message. Includes options 50 (requested IP address), 55
(parameter request list), 56 (error message), 57 (maximum message size), 60 (vendor class
identifier), 61 (client identifier).

Items generated automatically by the mechanism of DHCP message construction, which carry no
application information. Includes options 0 (pad), 52 (option overload), 53 (DHCP message type),
255 (end).
Unrecognized options: Options 62-63, 77-254 are unrecognized. Some of these codes are legitimate and are
defined in other RFCs, while others are not defined. These option codes are not explicitly disallowed on the
NSE, but the NSE is “unaware” of them – that is, it will make no attempt to validate either the code or the
data. It is the administrator’s responsibility to ensure that the option codes and data entered are legitimate.
The following screens illustrate adding additional DHCP options to a DHCP Pool.