Internet DRAFT - draft-grochla-80211-dhcp-option
draft-grochla-80211-dhcp-option
INTERNET-DRAFT Krzysztof Grochla
Intended Status: <draft> (Proximetry)
Expires: March 2, 2011 August 29 2010
IEEE 802.11 parameters DHCP Option
draft-grochla-80211-dhcp-option-00
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INTERNET DRAFT IEEE 802.11 parameters DHCP Option August 29, 2010
Abstract
The wireless access points and other devices requires configuration
of parameters such as channel, ESSID. This document describes the
DHCP options to be used to configure these parameters.
Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Terminology . . . . . . . . . . . . . . . . . . . . . . . . 3
2 IEEE 802.11 radio configuration DCHP option . . . . . . . . . . 4
3 IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
4. Security consideration . . . . . . . . . . . . . . . . . . . . . 5
5. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 5
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.1. Normative References . . . . . . . . . . . . . . . . . . . 5
Author's Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5
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INTERNET DRAFT IEEE 802.11 parameters DHCP Option August 29, 2010
1 Introduction
The IEEE 802.11 networks are very popular for providing Internet
access. The IP address of wireless network access points are
typically configured using DHCP protocol, but require manual
configuration of radio parameters. There exists also a few
autoconfiguration schemas for wireless mesh networks relaying on DHCP
protocol to configure the 802.11 interfaces. The additional options
proposed in this document allow to use DHCP to provide the radio
parameters in addition to the IP address, allowing to enable the
autoconfiguration procedure. This option may be also used for easy
manual configuration of basic parameters of wireless access points in
one central point and distributing it by DHCP protocol.
1.1 Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
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2 IEEE 802.11 radio configuration DCHP option
This section defines the DHCP option that configures the SSID and the
channel number of IEEE 802.11 network. The options have the same
structure for both DHCPv4 and DHCPv6. The option has the format shown
on the following figure:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| option-code | option-length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| channel | SSID length | |
+---------------+---------------+ +
| |
+ +
| SSID |
+ +
| |
+ +
| |
+ +
| |
+ +
| |
+ +
| |
+ +-------------------------------|
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
option-code: OPTION_80211_CHANN_SSID (TBD)
option-length: Length of the option in octet, must be multiple of
sixteen (16).
A DHCP client while requesting the parameters for a IEEE 802.11
interface that supports this option MAY request the 80211 Channel and
SSID option.
The DHCP server returns the option to the client if the server policy
is configured to do so. The SSID and channel may be preconfigured or
selected by any algorithm implemented on the server side. If the
option is received the interface SHOULD be configured to SSID and
channel transmitted, as long as they are valid for the device.
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3 IANA Considerations
The following DHCP option code for channel and SSID assignment must
be assigned by IANA:
Option Name Value Described in
---------------------------------------------------
OPTION_80211_CHANN_SSID TBD Section 2
4. Security consideration The security considerations in [RFC2131],
[RFC2132] and [RFC3315] apply. If an adversary manages to modify the
response from a DHCP server or insert its own response, the interface
may be configured to a SSID and channel provided by the intruder. In
security sensitive environment this should be taken into
consideration by network administrator.
5. Acknowledgments The following individuals are acknowledged for their
contributions to this protocol specification: Walter Buga
6. References
6.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2131] Droms, R., "Dynamic Host Configuration Protocol", RFC
2131, March 1997.
[RFC2132] Alexander, S. and R. Droms, "DHCP Options and BOOTP Vendor
Extensions", RFC 2132, March 1997
Author's Addresses
Krzysztof Grochla,
Proximetry Poland,
Al. Rozdzienskiego 91
40-203 Katowice, Poland
EMail: kgrochla@proximetry.com
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