Code
|
Option Name
|
Meaning
|
0
|
Pad
|
Causes subsequent fields to align on word boundaries.
|
255
|
End
|
Indicates end of options in the DHCP packet.
|
1
|
Subnet Mask
|
|
2
|
Time offset
|
Specifies the Universal Coordinated Time (UCT) offset in seconds.
|
3
|
Router
|
Specifies a list of IP addresses for routers on the client's subnet.¹
|
4
|
Time server
|
Specifies a list of IP addresses for time servers available to the client.¹
|
5
|
Name servers
|
Specifies a list of IP addresses for name servers available to the client.¹
|
6
|
DNS servers
|
Specifies a list of IP addresses for DNS name servers available to the client.¹
|
7
|
Log servers
|
Specifies a list of IP addresses for MIT_LCS User Datagram Protocol (UDP) log servers available to the client.2
|
8
|
Cookie servers
|
Specifies a list of IP addresses for RFC 865 cookie servers available to the client.¹
|
9
|
LPR servers
|
Specifies a list of IP addresses for RFC 1179 line-printer servers available to the client.¹
|
10
|
Impress servers
|
Specifies a list of IP addresses for Imagen Impress servers available to the client.¹
|
11
|
Resource location servers
|
Specifies a list of RFC 887 Resource Location servers available to the client.¹
|
12
|
Host name
|
Specifies the host name of up to 63 characters for the client. The name must start with a letter, end with a letter or digit, and have as interior characters only letters, numbers, and hyphens. The name can be qualified with the local DNS domain name.
|
13
|
Boot file size
|
Specifies the size of the default boot image file for the client, in 512-octet blocks.
|
14
|
Merit dump file
|
Specifies the ASCII path name of a file where the client's core image is dumped if a crash occurs.
|
15
|
Domain name
|
Specifies the DNS domain name that the client should use for DNS host name resolution.
|
16
|
Swap server
|
Specifies the IP address of the client's swap server.
|
17
|
Root path
|
Specifies the ASCII path for the client's root disk.
|
18
|
Extensions path
|
Specifies a file retrievable through TFTP, containing information interpreted like the vendor-extension field in the BOOTP response, except that the file length is unconstrained and references to Tag 18 in the file are ignored.
|
