B-14
User Guide for Cisco Network Registrar, 7.1
OL-16002-01
Appendices, Glossary, and Index
Appendix B DHCP Options
Option Tables
Option Tables
The following tables display the DHCP options in various ways. They show the options sorted
numerically, by Network Registrar name, and by category.
DHCP options have a prescribed format and allowed values for their option parameters.
lists
each DHCP option and parameter type (in the Validation column). The parameter formats and allowed
values come from the DHCP and Internet RFCs. All the DHCP options appear, but clients control only
some, and the CLI only others.
Options by Number
shows the DHCPv4 options sorted by option number, and includes the validation type. (See
for details on the option validation types found in the Validation column.) A
0+
in the Comments column means a repeat count of zero or more occurrences,
1+
means one or more
occurrences,
2n
means multiple occurrences in multiples of 2. Comments also indicate whether the
option includes suboptions, and, if so, how many, and whether the option is nonmodifiable (
NM
).
Tip
For the syntax for adding more complex option data values for suboptions, see the
Values for Suboptions” section on page 21-7
domain-name-servers 6
IP address of the name servers
netbios-name-servers 44
WINS server address
netbios-node-type
46
Identifies the NetBIOS client type; note that Network Registrar displays
a warning if it is not present
routers
3
IP address of the router for this subnet
Table B-9
Microsoft DHCP Client Options (continued)
Option Name
No. Description
Table B-10
DHCPv4 Options by Number
No. Network Registrar Name
Protocol Name
Validation
Comments
0
pad
Pad
NM
1
subnet-mask
Subnet Mask
2
time-offset
Time Offset
Replaced by tz-
options
(RFC 4833)
3
routers
Router
1+
4
time-servers
Time Server
1+
5
name-servers
Name Server
1+
6
domain-name-servers
Domain Server
1+
7
log-servers
Log Server
1+
8
cookie-servers
Quotes Server
1+
