Parameter Descriptions

This section describes the following parameters:

Note: In any parameter list values should be listed in order of preference.

BOOTP Parameters

The Dynamic Host Configuration Protocol (DHCP), as implemented in JOIN, fully supports the BOOTP parameters listed. If a BOOTP request is made of a JOIN server, JOIN acts as a BOOTP server.

Boot File

Specifies the fully qualified path name of the client's default boot image.

Boot File Server Address

Specifies the IP address of the client's boot server.

Boot File Server Name

Specifies the hostname of the server with the boot file.

Bootfile Size

Specifies the length in 512-octet blocks of the default boot image for the client. The file length is specified as a number.

Cookie Servers

Specifies a list of RFC 865 cookie servers available to the client.

DNS Domain Name

Specifies the domain name the client should use when resolving hostnames via Domain Name System.

DNS Servers

Specifies a list of DNS (STD 13, RFC 1035) name servers available to the client.

Extensions Path

Specifies a string to specify a file, retrievable via TFTP, which contains information that can be interpreted in the same way as the 64-octet vendor-extension field in the BOOTP response.

The length of the file is unconstrained.

Home Directory

Specifies the directory where the bootfile resides, if it is not specified in the boot file name.

Hostname

Specifies the hostname parameter if you are setting up a configuration for a single client identified by its MAC address.

Specifies the name of the client. The name may or may not be qualified with the local Domain Name. See RFC 1035 for character-set restrictions.

IEN-116 Name Servers

Specifies a list of IEN-116 name servers available to the client.

Impress Servers

Specifies a list of Imagen Impress servers available to the client.

Log Servers

Specifies a list of MIT-LCS UDP log servers available to the client.

LPR Servers

Specifies a list of RFC 1179 line-printer servers available to the client.

Merit Dump File

Specifies the pathname of a file to which the client's core image should be dumped in the event the client crashes.

Resource Location Servers

Specifies a list of RFC 887 Resource Location servers available to the client.

Root Path

Specifies the pathname that contains the client's root directory or partition.

Routers

Specifies the list of IP addresses for routers (gateways) on the client's subnet.

Note: If you specify a default gateway of 0.0.0.0, the server will use the client's IP address as the default gateway address.

Subnet Mask

Specifies the client's subnet mask as per RFC 950.

Send Client's Hostname

Specifies whether the server should send the client's hostname to the client in the reply.

Swap Server

Specifies the IP address of the client's swap server.

TFTP Root Directory

Specifies the root directory for TFTP.

Time Offset

Specifies the offset of the client in seconds from Universal Coordinated Time (UTC).

Time Servers

Specifies a list of RFC 868 time servers available to the client.

Vendor Magic Cookie

Specifies a vendor magic cookie for the client.

IP Parameters

IP layer parameters affect the operation of the IP layer on a per-host basis.

Broadcast Address

Specifies the broadcast address in use on the client's subnet.

Forward Non-Local Datagrams

Specifies whether the client should configure its IP layer to allow forwarding of datagrams with non-local source routes.

False disable forwarding of such datagrams
True enable forwarding

IP forwarding

 Specifies whether the client should configure its IP layer for packet forwarding.

False disable IP forwarding
True enable IP forwarding

IP Time-to-Live

 Specifies the default time-to-live that the client should use on outgoing datagrams. Time-to-Live is specified as an octet.

Minimum value 1
Maximum value 255

Interface MTU

 Specifies the MTU to use on this interface. MTU is the maximum transmit unit (frame size) in a TCP/IP network. MTU is specified as a 16-bit unsigned integer.
Minimum value 68

Maximum reassembly size

 Specifies the maximum size datagram that the client should be prepared to reassemble. The size is specified as a 16-bit unsigned integer.

Minimum value 576

MTU Plateaus

 Specifies a table of MTU (maximum transmit unit) sizes to use when performing Path MTU Discovery as defined in RFC 1191. The table is formatted as a list of 16-bit unsigned integers, ordered from smallest to largest.

Minimum value 68

PMTU Timeout

 Specifies the timeout to use when aging Path MTU values discovered by the mechanism defined in RFC 1191.

The timeout is specified in seconds as a 32-bit unsigned integer.

Perform Mask Discovery

Specifies whether or not the client should perform subnet mask discovery using ICMP (Internet Control Message Protocol).

False client should not perform mask discovery
True client should perform mask discovery

Perform Router Discovery

 Specifies whether or not the client should solicit routers using the Router Discovery mechanism defined in RFC 1256.

False client should not perform router discovery
True client should perform router discovery

Policy Filters

 Specifies policy filters for non-local source routing. The filters consist of a list of IP addresses and masks that specify destination/mask pairs with which to filter incoming source routes.

Any source-routed datagram whose next-hop address does not match one of the filters should be discarded by the client.

Solicit Router

Specifies the IP address to which the client should transmit router solicitation requests.

Static Routes

Specifies a list of static routes that the client should install in its routing table. If multiple routes to the same destination are specified, list them in descending order of priority.

The routes consist of a list of IP address pairs. The first address is the destination address, and the second address is the router for the destination.

Note: The default route (0.0.0.0) is an illegal destination for a static route.

Subnets Are Local

Specifies whether or not the client may assume that all subnets of the IP network to which the client is connected use the same MTU (maximum transmit unit) as the subnet of the network to which the client is directly connected.

False the client should assume that some subnets of the directly connected network may have smaller MTUs.
True all subnets share the same MTU.

Supply Masks

 Specifies whether or not the client should respond to subnet mask requests using ICMP (Internet Control Message Protocol).

False client should not respond
True client should respond

Lease Parameters

 Lease parameters allow you to change information about IP lease times. Lease times determine the length of time an IP address can be used.

DHCP Rebinding Time

Specifies the time interval in seconds from address assignment until the client requests a new lease from any server on the network.

DHCP Renewal Time

Specifies the time interval in seconds from address assignment until the client attempts to extend the duration of its lease with the original server.

DHCP Lease Time

This option is used in a client request (DHCPDISCOVER or DHCPREQUEST) to allow the client to request a lease time for the IP address. In a server reply (DHCPOFFER), a JOIN server uses this option to specify the lease time it is willing to offer.

The time may be entered in months, days, hours, minutes, and seconds. By default, lease time is interpreted in seconds.

Link Parameters

ARP Cache Timeout

 Specifies the time-out in seconds for ARP cache entries. The time is specified as a 32-bit unsigned integer.

Ethernet Encapsulation

If the interface is an Ethernet, use this option to specify whether or not the client should use Ethernet Version 2 (RFC 894) or IEEE 802.3 (RFC 1042) encapsulation.

False use RFC 894 encapsulation
True use RFC 1042 encapsulation

Trailer Encapsulation

 Specifies whether or not the client should negotiate the use of trailers (RFC 893) when using the ARP protocol.

False client should not attempt to use trailers
True client should attempt to use trailers

NetBIOS Parameters

NetBIOS Datagram Distribution Server

 Specifies a list of RFC 1001/1002 NBDD servers listed in order of preference.

NetBIOS Name Server/WINS Server

Specifies a list of RFC 1001/1002 NBNS name servers listed in order of preference.

NetBIOS Node Type

Allows NetBIOS over TCP/IP clients that are configurable to be configured as described in RFC 1001/1002. The value is specified as a single octet (from 0 to 255) that identifies the client type as follows:

Node TypeValue
B-node
1
P-node
2
M-node
4
H-node
8

NetBIOS Scope

 The NetBIOS scope option specifies the NetBIOS scope text parameter for the client as specified in RFC 1001/1002.

Network Parameters

Network parameters allow you to change basic network information.

Finger Servers

Specifies a list of Finger servers available to the client. Servers should be listed in order of preference.

IRC Servers

Specifies a list of IRC (Internet Relay Chat) servers available to the client. Servers should be listed on order of preference.

MobileIP Home Agents

Specifies a list of IP addresses indicating mobile IP home agents available to the client. Agents should be listed in order of preference.

NIS Domain Name

Specifies the name of the client's NIS domain.

NIS Name Server

Specifies a list of IP addresses indicating NIS servers available to the client. Servers should be listed in order of preference.

Note: If you plan to use a server with NIS, you must create a public key for DES authentication and create a JOIN pseudo map.

NIS+ Domain Name

Specifies the name of the client's NIS+ domain.

NIS+ Servers

Specifies a list of IP addresses indicating NIS+ servers available to the client. Servers should be listed in order of preference.

NNTP Servers

Specifies a list of NNTP (Network News Transfer Protocol) servers available to the client. Servers should be listed in order of preference.

POP3 Servers

Specifies a list of POP3 (Post Office Protocol 3) servers available to the client. Servers should be listed in order of preference.

SMTP Servers

Specifies a list of SMTP (Simple Mail Transfer Protocol) servers available to the client. Servers should be listed in order of preference.

STDA Servers

Specifies a list of STDA (StreetTalk Directory Assistance) servers available to the client. Servers should be listed in order of preference.

StreetTalk Servers

Specifies a list of StreetTalk servers available to the client. Servers should be listed in order of preference.

WWW Servers

Specifies a list of WWW (World Wide Web) servers available to the client. Servers should be listed in order of preference.

TCP Parameters

Keep Alive Interval

 Specifies the interval that the client should wait before sending a keepalive message on a TCP connection. The time is specified in seconds as a 32-bit unsigned integer. A value of zero indicates that the client should not generate keepalive messages on connections unless specifically requested to do so by an application.

Keep Alive Octet

This parameter specifies whether or not the client should send TCP keepalive messages with a garbage octet for compatibility with older implementations.

False a garbage octet should not be sent
True a garbage octet should be sent

TCP Default Time to Live

 This option specifies the default time-to-live that the client should use when sending TCP segments.

Minimum value 1

Time Parameters

 Time parameters allow you to change information about network time services available to clients on the network.

Network Time Protocol (NTP) Servers

Specifies a list of RFC 868 time servers available to the client.

X Window Parameters

X Window Display Manager

 Specifies a list of IP addresses of systems that are running the X Window system display manager and are available to the client.

X Windows Font Server

Specifies a list of X Window system font servers available to the client.

Last Modified: 11:29am , November 11, 1996