H3C EWPA1PCID User manual

H3C RF MODULE EWPA1PCID
User Manual
Hangzhou H3C Technologies Co., Ltd.
Manual Version: 6P100-20100412

Copyright © 2010, Hangzhou H3C Technologies Co., Ltd. and its
licensors
H3C Technologies Co., Ltd., a subsidiary of 3Com Corporation.
All Rights Reserved
No part of this manual may be reproduced or transmitted in any form
or by any means without prior written consent of Hangzhou H3C
Technologies Co., Ltd.
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trademarks of Hangzhou H3C Technologies Co., Ltd.
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Notice
The information in this document is subject to change without notice.
Every effort has been made in the preparation of this document to
ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of
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Obtaining Documentation and Technical Support
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configuration, and maintenance.
[Technical Support & Document > Software Download]: Provides the
documentation released with the software version.
Technical Support
[e-mail]
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At http://www.h3cnetworks.com
Documentation
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2) Select Documentation for Type of File and select Product
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Technical Support
Register Your Product
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Warranty and other service benefits are enabled through product
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Contact your authorized reseller or 3Com for a complete list of the
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Troubleshoot Online
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The Knowledgebase helps you troubleshoot H3C products. This
query-based interactive tool contains thousands of technical
solutions.
Access Software Downloads
Software Updates are the bug fix / maintenance releases for the
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Product Registration.
First time users will need to apply for a user name and password. A
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downloads.
Software Upgrades are the software releases that follow the
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access upgrades and related documentation you must first purchase
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Telephone Technical Support and Repair
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first register your product at http://www.h3cnetworks.com/
Warranty and other service benefits start from the date of purchase,
so it is important to register your product quickly to ensure you get full
use of the warranty and other service benefits available to you.
When you contact 3Com for assistance, please have the following
information ready:
zProduct model name, part number, and serial number
zProof of purchase, if you have not pre-registered your product
zA list of system hardware and software, including revision level
zDiagnostic error messages
zDetails about recent configuration changes, if applicable
To send a product directly to 3Com for repair, you must first obtain a
return authorization number (RMA). Products sent to 3Com, without
authorization numbers clearly marked on the outside of the package,
will be returned to the sender unopened, at the sender’s expense. If
your product is registered and under warranty, you can obtain an
RMA number online at http://www.h3cnetworks.com under
support, Repair & Replacement Request. First time users will need
to apply for a user name and password.
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3Com offers telephone, e-mail and internet access to technical
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Find a current directory of contact information posted on the web site
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Support Contact.
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You can e-mail your comments about product documentation to
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We appreciate your comments.

Environmental Protection
This product has been designed to comply with the requirements on
environmental protection. For the proper storage, use and disposal of
this product, national laws and regulations must be observed.

i
Table of Contents
1 FCC NOTICE..........................................................................................1-1
2 FCC Compliance Statement.................................................................2-1
3 ICES 003 Statement..............................................................................3-1
4 Declaration of Conformity....................................................................4-1
5 Product Introduction ............................................................................5-1
6 Basic Setup ...........................................................................................6-1
Hardware Installation .........................................................................6-1
WLAN Service Configuration .............................................................6-1
WLAN Service Overview............................................................6-2
802.11 Overview.........................................................................6-5
WLAN Topologies.......................................................................6-5
Configuring WLAN Service.........................................................6-8
Displaying and Maintaining WLAN Service..............................6-13
On a Fat AP..............................................................................6-13
WLAN Service Configuration Example.....................................6-14

1-1
1 FCC NOTICE
This module has been tested and found to comply with the limits for a
Class B digital module, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This module generates, uses
and can radiate radio frequency energy and, if not installed and used
in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this module
does cause harmful interference to radio or television reception, the
user is encouraged to try to correct the interference by one or more of
the following measures:
zReorient or relocate the receiving antenna.
zConnect the computer into an outlet on a circuit different from
that to which the receiver is connected.
zIncrease the separation between the computer and receiver.
zConsult the dealer or an experienced radio/TV technician for
help.
Caution
Any changes or modifications not expressly approved by the grantee
of this module could void the user's authority to operate the
equipment.

2-1
2 FCC Compliance Statement
This module complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1) This module may not cause harmful interference
2) This module must accept any interference received, including
interference that may cause undesired operation.
This module must accept any interference received, including
interference that may cause undesired operation.
Products that contain a radio transmitter are labelledwith FCC ID and
may also carry the FCC logo.
Caution
Exposure to Radio Frequency Radiation.
To comply with the FCC RF exposure compliance requirements, the
following antenna installation and module operating configurations
must be satisfied:
For configurations using an approved external antenna, the
separation distance between the antenna and any person’s body
(including hands, wrists, feet and ankles) must be at least 20cm (8
inch).
The transmitter shall not be collocated with other transmitters or
antennas.
IEEE 802.11b or 802.11g operation of this product in the U.S.A. is
firmware-limited to channels 1 through 11.
This module is intended only for OEM integrators under the following
conditions:
1) The antenna must be installed such that 20 cm is maintained
between the antenna and users

2-2
2) The transmitter module may not be co-located with any other
transmitter or antenna.
As long as 2 conditions above are met, further transmitter test will not
be required. However, the OEM integrator is still responsible for
testing their endproduct for any additional compliance requirements
required with this module installed (for example, LVD TV …etc.).
Caution
This module only could work when being installed into “client device”
which could not transmit automatically, such as ROUTER or AP, with
the software driver limit.
IMPORTANT NOTE
In the event that these conditions can not be met (for example certain
laptop configurations or co-location withanother transmitter), then the
FCC authorization is no longer considered valid and the FCC ID can
not be used on the final product. In these circumstances, the OEM
integrator will be responsible for re-evaluating the end product
(including the transmitter) and obtaining a separate FCC
authorization.
WARNING
This Wireless Mini PCI Adapter does not support ad-hoc mode
function.
End Product Labeling
This transmitter module is authorized only for use in module where
the antenna may be installed such that 20 cm may be maintained
between the antenna and users. The final end product must be
labeled in a visible area with the following: “FCC ID:
U6IRTV1SAPPCID”.

3-1
3 ICES 003 Statement
This Class B digital apparatus complies with Canadian ICES-003.

4-1
4 Declaration of Conformity
H3C, Inc. declares the following:
Product Name: H3C RF Module
Model No.: EWPA1PCID
Conforms to the following Product Standards:
Radiated Emission Standards
ETSI EN 301489-1;
ETSI EN 301489-17;
ETSI EN 300 328;
FCC Part 15;
Conducted Emission Standards
ETSI EN 301489-1 ;
ETSI EN 301489-17;
FCC Part 15;
Immunity Standards
ETSI EN 301489-1 ;
ETSI EN 301489-17;
Low Voltage Directive:
EN 60950-1/A11: 2004
Therefore, this product is in conformity with the following
regional standards
FCC Class B  following the provisions of FCC Part 15 directive;
CE Mark  following the provisions of the EC directive.

5-1
5 Product Introduction
EWPA1PCID Module is dual-band, multi-mode, IEEE 802.11b/g
WLANs. It integrates a 2.4GHz radio, analog-to-digital and
digital-to-analog (ADC/DAC) converters, a base-band processor,
multi-protocol media access control (MAC), high speed UART, and a
PCI/Card Bus host interface. It enables a high performance, cost
effective, low power, compact solution that easily fit onto one side of a
Mini PCI or PCI Card.
EWPA1PCID RF Module is one part of H3C MSR 20-1X series
routers. With this module inside the Routers, which support WLAN
function. As high-quality governmental, business and commercial
sites oriented routers, the H3C MSR 20-1X series routers are
multifunction routers developed for small businesses, branches of
businesses, and home users. While “high-quality business and
commercial sites” need to satisfy users’ requirements for broadband,
wireless and voice access modes and provide VPN and QoS
supports, they have a high demand for the performance, stability,
security and manageability of the router devices. The most significant
characteristics of the MSR 20-1X series routers are high
performance-to-cost ratio and low price. The routers provide different
types of built-in communication interfaces to interface with networks
of different types of media, and provide an SIC/DSIC slot for interface
capability expansion.

6-1
6 Basic Setup
This chapter outlines the basic requirement for the installation and
configuration of the module.
This module is a part of H3C MSR 20-1X router. You must plug it into
the router’s PCI slot, then you can use it.
Hardware Installation
1) Turn off your router and switch off the power from the main power
supply.
2) Then insert the RF module into your PCI slot. Ensure that the RF
module is properly seated into the slot.
3) Power on your PC.
WLAN Service Configuration
The term "AP" or an APicon in this document refers to an AP-capable
router.
When configuring WLAN service, go to these sections for information
you are interested in:
zWLAN Service Overview
z802.11 Overview
zWLAN Topologies
zProtocols and Standards
zConfiguring WLAN Service
zDisplaying and Maintaining WLAN Service
zWLAN Service Configuration Example

6-2
WLAN Service Overview
Wireless Local Area Networks (WLAN) have become very popular
because they are very easy to setup and use, and users need not
care about the complex wiring connections and relocation problems.
A WLAN is not completely wireless because the servers in the
backbone are fixed and clients are mobile.
Using the WLAN solution, network operators and enterprises can
provide wireless LAN services to their customers. These services
include:
zWLAN client connectivity to conventional 802.3 LANs.
zSecured WLAN access with different authentication and
encryption methods.
zSeamless roaming of WLAN clients in the mobility domain.
Terminology:
1) Client
A handheld computer or laptop with a wireless Network Interface
Card (NIC) can be a WLAN client.
2) Access Point
A device that performs the bridging function from wireless to wired
conversion and wired to wireless conversion of frames between a
client and the LocalArea Network (LAN).
3) Access Controller (AC)
Adevice that controls and manages all theAPs in the WLAN. The AC
communicates with an Authentication server for WLAN client
authentication.
4) FAT Access Point (Fat AP)
A device that controls and manages all the wireless stations and
performs the bridging operation from wireless to wired conversion
and wired to wireless conversion of frames between a client and the
LAN.

6-3
5) Wireless Medium
A medium that is used for transmitting frames between clients. Radio
Frequency is used as the wireless medium in the WLAN system.
6) Distribution System
The distribution system is used to forward frames to their destination.
It is the backbone to transmit frames between access points.
7) Split MAC
In Split MAC mode, the services to be managed are distributed
between AP and AC. The AP manages real-time services like,
beacon generation, power management, fragmentation and
defragmentation. The AC manages services related to packet
distribution, association, dissociation and reassociation.
8) Active Scanning
Active Scanning is used by clients to scan surrounding wireless
networks and locate the compatible one. A client prepares a list of
channels and transmits a probe request frame on each of them.
When an AP receives these frames, it responds with its network
parameters. Thus the client knows whether the AP can provide
wireless services.
9) Passive Scanning
Type of scanning used by a client when it wants to save the battery
power. The client prepares a list of channels to scan and listens to
beacons on each of these channels. In this case, the AP needs to
periodically broadcast beacon frames.
10) Authentication
A mechanism to ensure secure connection between client and AC or
Fat AP. Two types of authentication mechanisms are used:
zOpen system authentication
zShared key authentication
Open SystemAuthentication is the default authentication mechanism.
In this mechanism, a client sends an authentication request frame to

6-4
the AP, which relays this frame to the AC. The AC sends an
authentication response to the AP, which conveys this response to
the client. See WLAN Security Configuration for more information on
shared key authentication.
11) De-Authentication
The AC or Fat APsends a de-authentication frame to remove client(s)
from the wireless system. De-authentication can occur due to many
reasons, such as:
zReceiving an association/disassociation frame from a client
which is unauthenticated.
zReceiving a data frame from a client which is unauthenticated.
zReceiving a PS-Poll frame from a client which is
unauthenticated.
zThe validity timer for a client expires and the port is not secured
and so on.
12) Association
A client that wants to access the wireless network via anAP, must be
associated with that particular AP.
Once the client chooses the compatible network and authenticate to
an AP, it sends an association request frame to the AP. The AP sends
an association response tothe client and adds the client’s information
in its database. At a time a client can associate with only one AP. The
association is always initiated by the client, but not by the AP.
13) Dissociation
Aclient sends a disassociation frame to theAP to end the association
between them. Dissociation can occur due to many reasons, such as:
zReceiving a data frame from a client which is authenticated and
unassociated.
zReceiving a PS-Poll frame from a client which is authenticated
and unassociated.
A dissociation frame is either unicast or broadcast.

6-5
14) Re-association
When a client is roaming from one AP area/BSS area to another, it
sends a re-association request to the new AP/BSS area. The AP
relays this re-association request to the AC. The AC then informs the
previous AP to delete the client’s information from its database,
informs the newAP to add the client’s information in its database and
conveys successful reassociation information to the client.
802.11 Overview
The following functions are provided by the WLAN-MAC:
zBeacon generation
zHandling Probe Requests
zHandling Open System Authentication
zHandling (Re) Association
zHandling Deauthentication
zHandling Disassociation
zPower Management
zFragmentation and Defragmentation
zDot11 to Ethernet Frame Conversion
zEthernet to Do11 Frame Conversion
zKeep Alive Mechanism
zIdle Timeout Mechanism
zClear Channel Search
WLAN Topologies
WLAN Topologies for Fat APs
WLAN topologies for FatAPs consist of:
zSingle BSS
zMulti-ESS
zSingle ESS Multi-BSS

6-6
Single BSS
The coverage of an AP is called a Basic Service Set (BSS). Each
BSS is identified by a BSSID. The most basic WLAN network can be
established with only one BSS. All wireless clients associate with
same BSS. If those clients have the same authorization, they can
communicate with each other. Figure 6-1 shows a single BSS
network.
Figure 6-1 Single BSS network
The clients can communicate with each other or reach a host in the
Internet. Communication between clients within the same BSS is
carried out through the FatAP.
Muti-ESS
This topology describes a scenario where more than one ESS exists.
When a mobile client joins the Fat AP, it can join one of the available
ESSs. Figure 6-2 shows the multi-ESS network.

6-7
Figure 6-2 Multiple ESS network
Generally a Fat AP can provide more than one logical ESS at the
same time. The Fat AP can broadcast the current information of ESS
by Beacon or Probe response frames. Clients can select an ESS it is
interested to join.
Different ESS domains can be configured on the fat AP. The fat AP
can be configured to allow advertising and accepting clients in these
ESS domains once their credentials are accepted.
Single ESS Muti-BSS (The multi-radio case)
This topology describes a scenario where a Fat AP has two radios
that are in the same ESS but belong to different BSSs.
Figure 6-3 Single ESS Multiple BSS network