Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guia Do Desenho
6-10
Enterprise Mobility 4.1 Design Guide
OL-14435-01
Chapter 6 Cisco Unified Wireless Multicast Design
Additional Considerations
Additional Considerations
Two areas for additional consideration in multicast deployment are when implementing AP groups, and
H-REAPs and REAPs. AP groups allow APs on the same controller to map the same WLAN (SSID) to
different VLANs. If a client is roaming between APs in different groups, the multicast session will not
function properly as this is currently not supported. Currently, the WLC forwards multicast only for the
VLAN configured on the WLAN and does not take into consideration VLANs configured in AP groups.
H-REAPs and REAPs. AP groups allow APs on the same controller to map the same WLAN (SSID) to
different VLANs. If a client is roaming between APs in different groups, the multicast session will not
function properly as this is currently not supported. Currently, the WLC forwards multicast only for the
VLAN configured on the WLAN and does not take into consideration VLANs configured in AP groups.
REAP and H-REAP APs allow the local termination of WLANs at the network edge rather than at the
WLC, and the multicast behavior is controlled at that edge. If an H-REAP WLAN is terminated on a
WLC and multicast is enabled on that WLC, multicast is delivered to that H-REAP WLAN, if the
LWAPP multicast group is allowed to extend to the H-REAP network location.
WLC, and the multicast behavior is controlled at that edge. If an H-REAP WLAN is terminated on a
WLC and multicast is enabled on that WLC, multicast is delivered to that H-REAP WLAN, if the
LWAPP multicast group is allowed to extend to the H-REAP network location.
Even if the LWAPP multicast packets are not able to transit the network to the H-REAP, WLAN clients
on that H-REAP are able to send IGMP joins to the network connected to the WLC, as these are unicast
messages.
on that H-REAP are able to send IGMP joins to the network connected to the WLC, as these are unicast
messages.