Cisco Cisco 2504 Wireless Controller Guia De Resolução De Problemas

Unicast CAPWAP Tunnel

copy of the
multicast
packet

Supported
Access
Point
Modes

FlexConnect and Local

Local Mode
Only

Requires L3
Multicast
Routing on
Wired
Network

No

Yes

Controller
Loading

High

Low

Wired
Network
Loading

High

Low

Multicast-multicast mode is the recommended option for scalability and wired bandwidth efficiency
reasons.

Note: Multicast-multicast mode is required for the 2500-Series Wireless LAN Controller.

Go to the Controller tab under the General page and make sure AP Multicast Mode is configured
to use Multicast mode and that a valid group address is configured. The group address is an IPv4
multicast group and is recommended to be in the 239.x.x.x-239.255.255.255 range which is
scoped for private multicast applications. Do not use the 224.x.x.x, 239.0.0.x or the 239.128.0.x
address ranges for the multicast group address. Addresses in these ranges overlap with the link
local MAC addresses and flood all switch ports, even with IGMP snooping enabled.

If the wired network is not properly configured to deliver the CAPWAP multicast between the
controller and AP or FlexConnect mode and APs will be used for centrally switched WLANs
supporting multicast, then unicast-multicast mode is required.