Cisco Aironet 1140 Series Посібник для початківців - Сторінка 14
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SSIDs that you create appear in the SSID table at the bottom of the page. You can create up to 16
SSIDs on the access point.
Using VLANs
If you use VLANs on your wireless LAN and assign SSIDs to VLANs, you can create multiple SSIDs
by using any of the four security settings on the Express Security page. However, if you do not use
VLANs on your wireless LAN, the security options that you can assign to SSIDs are limited because
of the limited Express Security page encryption options. Without VLANs, encryption settings (WEP
and ciphers) apply to an interface, such as the radio, and you cannot use more than one encryption
setting on an interface. For example, when you create an SSID with static WEP with VLANs
disabled, you cannot create additional SSIDs with WPA authentication because they use di erent
encryption settings. If you nd that the security setting for an SSID con icts with another SSID, you
can delete one or more SSIDs to eliminate the con ict.
If any VLANs are de ned on the access point, the trunk port on the switch must be limited to allow
only the VLANs de ned on the access point.
Express Security Types
There are four security types you can assign to an SSID:
•
No security—The least secure option. Use this option only for SSIDs used in a public space, and
assign it to a VLAN that restricts access to your network.
•
Static WEP Key—More secure than no security. Static WEP keys are vulnerable to attack. There
are two di erent lengths for WEP keys: 40-bit and 128-bit (hexadecimal or ASCII characters).
Cisco access points use hexadecimal characters. Client adapters can use either, depending on
how the vendor chooses to con gure them.
•
EAP Authentication—Enables 802.1x authentication. Requires an IP address and shared secret
from an authentication server on your network (server authentication port 1645). You do not
need to enter a WEP key.
•
WPA—Wi-Fi Protected Access (WPA) permits wireless access to users authenticated against a
database through the services of an authentication server and encrypts their IP tra c with
stronger algorithms than those used in WEP. As with EAP authentication, you must enter the IP
address and shared secret for an authentication server on your network (server authentication
port 1645).
Con guring Security for 802.11n
To achieve 802.11n speeds, you need to con gure the access point for no encryption or
WPA2/AES encryption. Any other setting eliminates 802.11n capabilities from the con guration.
Express Security Limitations
Because the Express Security page is designed for simple con guration of basic security, the
options available are a subset of the access point security capabilities. Keep these limitations in
mind when using the Express Security page:
•
You cannot edit SSIDs. However, you can delete SSIDs and recreate them.
•
You cannot assign SSIDs to speci c radio interfaces. The SSIDs that you create are enabled on
all radio interfaces. To assign SSIDs to speci c radio interfaces, choose
Manager.
https://www.cisco.com/c/en/us/td/docs/wireless/access_point/1140/autonomous/getting_started/guide/ap1140aut_getstart.html
Getting Started Guide: Cisco Aironet 1140 Series Autonomous Access Point - Cisco
Security > SSID
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