B-11
User Guide for Cisco Network Registrar, 7.1
OL-16002-01
Appendices, Glossary, and Index
Appendix B DHCP Options
Option Descriptions
Table B-8
DHCPv6 Options
Network Registrar Name
(Type)
No. Description (Mod=modifiable)
client-identifier
1
DUID identifying a client between a client and a server.
server-identifier
2
DUID identifying a server between a client and a server.
ia-na
3
Nontemporary Addresses option with the associated parameters and
addresses. Parameters are the unique ID, time the client contacts the
addresses in the IA to extend the lifetime, and time the client contacts
any available server to extend the lifetime of the addresses.
ia-ta
4
Temporary Addresses option with the associated parameters and
addresses.
iaaddr
5
IPv6 addresses associated with an IA_NA or IA_TA. (The IAADRR
must be encapsulated in the options field of an IA_NA or IA_TA
option.) The IAADDR option includes preferred and valid lifetime
fields, and the options field that encapsulates the options specific to
this address.
oro
6
Option Request option (ORO) that identifies a list of options in a
message between a client and a server. A client can include this option
in a Solicit, Request, Renew, Rebind, Confirm, or Information-request
message to inform the server about options the client wants from the
server. A server can include this option in a Reconfigure message to
indicate which option updates the client should request.
preference
7
A server sends this option to a client to affect what server the client
selects (Mod).
elapsed-time
8
A client sends this option to a server to indicate how long the client
has been trying to complete a message exchange (Mod).
relay-message
9
DHCP message in a Relay-forward or Relay-reply message.
auth
11
Authenticates the identity and contents of a DHCP message. The
parameters are the authentication protocol, the authentication
algorithm, the replay detection method (RDM), and the authentication
information.
server-unicast
12
The server sends this option to a client to indicate that the client can
unicast messages to the server.
status-code
13
Returns a status indication related to the DHCP message or option in
which it appears. The parameters are the status code and status
message.
rapid-commit
14
Signals use of the two-message exchange for address assignment.
user-class
15
Clients use this option to identify the type or category of user or
applications it represents. A zero type count value field followed by
user data (as a blob).
vendor-class
16
Clients use this option to identify the vendor that manufactured the
hardware on which they are running.
