GE StoreSafe Pro Series, Руководство пользователя

Страница: 10 / 26

B-10
User Guide for Cisco Network Registrar, 7.1
OL-16002-01
Part 6 : Appendices, Glossary, and Index Appendix B DHCP Options
Option Descriptions
DHCPv6 Options
Table B-8 on page B-11 lists the DHCPv6 options, along with their defined data types. All the option
packets include at least an option length (option-len) and a variable length data field. There can also be
additional parameter settings, as described in the table.
Mod in the Description column indicates that the
option is modifiable. Many of these options are described in RFC 3315.
Client-Identifier 61 2 octet
minimum Used by DHCP clients to specify their unique identifier. DHCP
servers use this value to index their database of address bindings.
This value is expected to be unique for all clients in an
administrative domain.
DHCP servers should treat identifiers as opaque objects. The client
identifier can consist of type-value pairs similar to the
htype / chaddr fields. For instance, it can consist of a hardware type
and hardware address. In this case, the type field should be one of
the ARP hardware types defined in STD2. A hardware type of 0
(zero) should be used when the value field contains an identifier
other than a hardware address (for example, a fully qualified
domain name).
For correct identification of clients, each client-identifier must be
unique among the client-identifiers used on the subnet to which the
client is attached. Vendors and system administrators are
responsible for choosing client-identifiers that meet this
requirement for uniqueness.
TFTP Server
Name 66 1 octet
minimum Identifies a TFTP server when the sname field in the DHCP header
has been used for DHCP options.
Bootfile Name 67 1 octet
minimum Identifies a bootfile when the file field is the DHCP header that has
been used for DHCP options.
Relay Agent
Information 82 Identifies the DHCP relay agent information.
iSNS 83 14 bytes
minimum Identifies the Internet Storage Name Service (see RFC 4174)
BCMS
Controller
Domain 88 Variable List of Broadcast and Multicast Service (BCMS) controller
domains (see RFC 4280)
BCMS Address 89 4 octets
minimum List of IP addresses for the BCMS controller (see RFC 4280)
Lease Query
Client Last
Transaction
Time 91 4 octets Time of the most recent access of the client sending a
DHCPLEASEQUERY (see RFC 4388).
Lease Query
Associated IP
Addresses 92 4 octets
minimum All IP addresses associated with the client specified in a particular
DHCPLEASEQUERY message (see RFC 4388).
Table B-7 DHCPv4 Extensions (continued)
Option Name No. Length Description