Specifications

CHAPTER 9
Wireless LANs in a Campus Network
Integrating Wireless into the LAN
This section covers configuring your switches for wireless APs and controllers, and planning your installation.
Switch Configuration
When the switch port connects to a stand-alone AP, configure it as an access port if the AP has only one VLAN and a
trunk port if it has multiple VLANs. Trust CoS if the link is a trunk. Set the trunk native VLAN to the AP’s management
VLAN. Prioritize voice if you use wireless phones.
When the switch port connects to a controller-based AP, the port should be an access port. The port should be placed into
the management VLAN because it is used for traffic between the AP and the controller. Trust DSCP on the port. If using
wireless IPT, also set up QoS to prioritize voice.
The switch port connecting to a WLAN controller should be configured as a trunk link. Limit the trunk to wireless and
management VLANs. Trust CoS and prioritize voice if you use wireless IP phones.
Links to a 4400 series controller might be aggregated into a Layer 2 Etherchannel. The 4400 cannot negotiate aggrega-
tion, so it is important to set the channel-group mode to “On”. Otherwise, the configuration is the same as with any other
Etherchannel. Configure the channel as a trunk, allow only the management and wireless VLANs, and trust CoS.
The WiSM requires a separate VLAN for its management. This VLAN should be assigned only to the module’s service
port and should not be used outside of the switch. Assign the VLAN to the service port with the global command wism
service-vlan vlan. Assign an IP address to the VLAN interface; this IP address is used to communicate with the WiSM.
The WiSM contains eight logical ports that connect to the switch fabric in two Etherchannel bundles. It also contains two
separate controllers. Bundle configuration is done at each controller, using the wism module slot# controller controller#
set of global commands.
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CCNP SWITCH 642-813 Quick Reference by Denise Donohue