Cisco Systems OL-29225-01 Assigning IP Redirection for an SSID

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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points

OL-30644-01

Chapter7 Configuring Multiple SSIDs

Assigning IP Redirection for an SSID

When client devices receive a beacon that contains a DTIM, they normally wake up to check for pending

packets. Longer intervals between DTIMs let clients sleep longer and preserve power. Conversely,

shorter DTIM periods reduce the delay in receiving packets but use more battery power because clients

wake up more often.

The default beacon rate is 2, which means that every other beacon contains a DTIM. Enter a beacon rate

between 1 and 100.

Note Increasing the DTIM period count delays the delivery of multicast packets. Because multicast packets

are buffered, large DTIM period counts can cause a buffer overflow.

Step9 In the Guest Mode/Infrastructure SSID Settings section, select Multiple BSSID.

Step10 Click Apply.

CLI Configuration Example

This example shows the CLI commands that you use to enable multiple BSSIDs on a radio interface,

create an SSID called visitor, designate the SSID as a BSSID, specify that the BSSID is included in

beacons, set a DTIM period for the BSSID, and assign the SSID visitor to the radio interface:

ap(config)# interface do0

ap(config-if)# mbssid

ap(config-if)# exit

ap(config)# dot11 ssid visitor vlan20

ap(config-ssid)# mbssid guest-mode dtim-period 3

ap(config-ssid)# exit

ap(config)# interface do0

ap(config-if)# ssid visitor

You can also use the dot11 mbssid global configuration command to simultaneously enable multiple

BSSIDs on all radio interfaces that support multiple BSSIDs.

Use the show dot11 bssid privileged EXEC command to display the relationship between SSIDs and

BSSIDs or MAC addresses. This example shows the command output:

AP1230#show dot11 bssid

Interface BSSID Guest SSID

Dot11Radio1 0011.2161.b7c0 Yes atlantic

Dot11Radio0 0005.9a3e.7c0f Yes WPA2-TLS-g

Assigning IP Redirection for an SSID

When you configure IP redirection for an SSID, the access point redirects all packets sent from client

devices associated to that SSID to a specific IP address. IP redirection is used mainly on wireless LANs

serving handheld devices that use a central software application and are statically configured to

communicate with a specific IP address. For example, the wireless LAN administrator at a retail store

or warehouse might configure IP redirection for its bar code scanners, which all use the same scanner

application and all send data to the same IP address.