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Update attribution and document relay agent information options.

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Ted Lemon
1999-03-16 00:39:29 +00:00
parent 6b74a7a8cf
commit 660dfc0f8f
1 changed files with 42 additions and 6 deletions
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48
common/dhcp-options.5
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@@ -567,13 +567,49 @@ This option can be used to specify the a DHCP client identifier in a
host declaration, so that dhcpd can find the host record by matching host declaration, so that dhcpd can find the host record by matching
against the client identifier. against the client identifier.
.RE .RE
.SH RELAY AGENT INFORMATION OPTION
An IETF draft, draft-ietf-dhc-agent-options-03.txt, defines a series
of encapsulated options that a relay agent can add to a DHCP packet
when relaying it to the DHCP server. The server can then make
address allocation decisions (or whatever other decisions it wants)
based on these options. The server also returns these options in any
replies it sends through the relay agent, so that the relay agent can
use the information in these options for delivery or accounting
purposes.
.PP
The current draft defines two options. To reference
these options in the dhcp server, specify the option space name,
"agent", followed by a period, followed by the option name. It isn't
useful to specify these options to be sent, nor is it useful to
reference them at all in the client.
.B option \fBagent.circuit-id\fR \fIdata-string\fR\fB;\fR
.RS 0.25i
.PP
The circuit-id suboption encodes an agent-local identifier of the
circuit from which a DHCP client-to-server packet was received. It is
intended for use by agents in relaying DHCP responses back to the
proper circuit. The format of this option is currently defined to be
vendor-dependent, and will probably remain that way, although the
current draft allows for for the possibility of standardizing the
format in the future.
.RE
.PP
.B option \fBagent.circuit-id\fR \fIdata-string\fR\fB;\fR
.RS 0.25i
.PP
The remote-id suboption encodes information about the remote host end
of a circuit. Examples of what it might contain include caller ID
information, username information, remote ATM address, cable modem ID,
and similar things. In principal, the meaning is not well-specified,
and it should generally be assumed to be an opaque object that is
administratively guaranteed to be unique to a particular remote end of
a circuit.
.SH SEE ALSO .SH SEE ALSO
dhcpd.conf(5), dhcpd.leases(5), dhclient.conf(5), dhcpd(8), dhcpd.conf(5), dhcpd.leases(5), dhclient.conf(5), dhcp-eval(5), dhcpd(8),
dhclient(8), RFC2132, RFC2131. dhclient(8), RFC2132, RFC2131, draft-ietf-dhc-agent-options-??.txt.
.SH AUTHOR .SH AUTHOR
.B dhcpd(8) The Internet Software Consortium DHCP Distribution was written by Ted
was written by Ted Lemon <mellon@vix.com> Lemon <mellon@isc.org> under a contract with Vixie Labs. Funding for
under a contract with Vixie Labs. Funding this project was provided through the Internet Software Consortium.
for this project was provided by the Internet Software Corporation.
Information about the Internet Software Consortium can be found at Information about the Internet Software Consortium can be found at
.B http://www.isc.org/isc. .B http://www.isc.org/isc.