Black Box LWN600CM-1 Uživatelská příručka stáhnout pdf (Strana 85)

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Chapter 8: Basic Configuration Examples

Enable MAC Authentication: (clear)

User profile assigned to users that associate with this SSID: default-profile

The predefined user profile "default-profile" applies the standard SmartPath Quality of Service level through the

predefined QoS policy "def-user-qos" and assigns user traffic to VLAN 1.

SSIDBroadcastBand:2.4GHz(11n/b/g)

 SmartPathAPshavetworadios:a2.4-GHzradio,whichsupports802.11n/b/g,anda5-GHzradio,whichsupports

802.11n/a. On all SmartPath AP models, both radios can function concurrently. This setting broadcasts the SSID on the

wifi0interface,whichisboundtothe2.4-GHzradio.(Thereisanassumptionthatyourclientssupportatleastoneofthe

following IEEE standards: 802.11n, 802.11g, or 802.11b.)

As will be seen later in this chapter, one SmartPath AP will be deployed as a mesh point; that is, it will not have an

Ethernet connection but will connect to the wired network over a wireless backhaul link through another SmartPath AP

that does have an Ethernet connection (see Section 8.5). Because of this, the SmartPath APs must use one radio for

wirelessbackhaulcommunicationsandtheotherradioforclientaccess.Bydefault,boththe2.4-GHzand5-GHzradios

are in access mode.

 Intheseriesofexamplesinthischapter,yousetthe5-GHzradioinbackhaulmode,andthe2.4-GHzradioinaccess

mode.Therefore,youassigntheSSIDtothe2.4-GHzband.

To see how the different SSID settings determine the way that the SmartPath AP advertises the SSID and how clients form

associations with it, see Figure 8-2.

Beacons

Client

SSID: test1-psk

Key method: WPA-PSK or WPA2-PSK

Encryption: CCMP (AES) or TKIP

Supported rates and capabilities

The SmartPath AP broadcasts beacons advertising

the SSID “test1-psk” and its security and network

capabilities on the 2.4 GHz band.

If the client sends a probe request to discover

available SSIDs, the SmartPath AP responds with

the same information as that in its beacons.

The client sends an authentication request, and

because WPA and WPA2 use open authentication,

the response always accepts the request.

The client sends its capabilities, and the SmartPath AP

replies if these are acceptable or not. If they are, it

creates an association ID and sends it to the client.

The SmartPath AP and client exchange the preshared

key and other information to derive keys to encrypt

unicast traffic. (Later, they derive encryption keys for

multicast and broadcast traffic as well.)

Beacons

Probe Request

Probe Response

Authentication Request

Authentication Response

Association Request

Association Response

Four-Way Handshake

SmartPath AP

Figure8-2.HowaclientdiscoverstheSSIDandformsasecureassociation.

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