Information Technology Reference
In-Depth Information
strength, packet size, and so on. The Sniffer feature can be enabled only if you run
AiroPeek, a third-party network analyzer software that supports decoding of data
packets.
Bridge mode:
The Bridge mode feature on the Cisco 1130 and 1240 series (typically
indoor usage) and 1500 APs (typically outdoor mesh usage) provides cost-effective,
high-bandwidth wireless bridging connectivity. Applications supported are point-to-
point bridging, point-to-multipoint bridging, point-to-point wireless access with inte-
grated wireless backhaul, and point-to-multipoint wireless access with integrated
wireless backhaul.
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Ta ble 5 - 4 summarizes the AP modes.
Ta b l e 5 - 4
Access Point Modes
AP Mode
Description
Local mode
The default mode of operation.
H-REAP mode
For remote LWAP management ac ros s WAN links.
Monitor mode
The APs exclude themselves from handling data traffic and dedicate
themselves to location-based services (LBS).
Rogue Detector
mode
Monitors for rouge APs.
Sniffer mode
Captures and forwards all packets of a remote sniffer.
Bridge mode
For point-to-point and point-to-multipoint solutions.
LWA P P D i s c o v e r y o f W LC
When LWA P s are placed on the network, they first perform DHCP discovery to obtain an
IP address. Then Layer 3 LWA P P discovery is attempted. If there is no WLC response, the
AP reboots and repeats this process. The Layer 3 LWA P P discovery algorithm is as follow s:
1.
The AP sends a Layer 3 LWAPP discovery request.
2.
All WLCs that receive the discovery request reply with a unicast LWAPP discovery
response message.
3.
The AP compiles a list of WLCs.
4.
The AP selects a WLC based on certain criteria.
5.
The AP validates the selected WLC and sends an LWAPP join response. An encryp-
tion key is selected, and future messages are encrypted.
Layer 3 discovery requests are sent as listed:
Local subnet broadcast
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Unicast LWAPP discovery requests to WLC IP addresses advertised by other APs
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