Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guia Do Desenho
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Enterprise Mobility 4.1 Design Guide
OL-14435-01
Chapter 6 Cisco Unified Wireless Multicast Design
Multicast Enabled Networks
Figure 6-2
Asymmetric Tunneling
Note
In the event of a client roam there is a slight disruption in the multicast session; in some applications it
may be considered unsuitable for use.
may be considered unsuitable for use.
Multicast Enabled Networks
A prerequisite for using this new multicast performance functionality is that a multicast enabled network
is configured on all routers between the controllers and the APs. A multicast-enabled network allows for
an efficient way to deliver a packet to many hosts across the network. IP multicast is a
bandwidth-conserving technology that reduces traffic by simultaneously delivering a single stream of
information to thousands of corporate recipients. Packets are replicated as necessary at each Layer 3
point in the network. A multicast routing protocol, such as PIM, is required if there is more than one
router between the controllers and APs. For more information on setting up a multicast-enabled network,
refer to the following URL:
is configured on all routers between the controllers and the APs. A multicast-enabled network allows for
an efficient way to deliver a packet to many hosts across the network. IP multicast is a
bandwidth-conserving technology that reduces traffic by simultaneously delivering a single stream of
information to thousands of corporate recipients. Packets are replicated as necessary at each Layer 3
point in the network. A multicast routing protocol, such as PIM, is required if there is more than one
router between the controllers and APs. For more information on setting up a multicast-enabled network,
refer to the following URL:
LWAPP Multicast Reserved Ports and Addresses
The controller blocks all multicast packets sent to any multicast group that have a destination port of
12222 through 12224. Additionally, all packets with a multicast group address equal to the controller’s
LWAPP multicast group address are blocked at the controller. This is to prevent fragmented LWAPP
encapsulated packets from another controller being retransmitted (see
12222 through 12224. Additionally, all packets with a multicast group address equal to the controller’s
LWAPP multicast group address are blocked at the controller. This is to prevent fragmented LWAPP
encapsulated packets from another controller being retransmitted (see
for more information). Ensure that the multicast applications on your network do not
use these reserved ports or LWAPP multicast group addresses.
Controller 1
222288
LWAPP
LWAPP
LWAPP
LWAPP
Subnet A
Client Data
Subnet B
AP A
AP B
AP C
AP D
Ethernet IP Tunnel
Controller 2
Multicast Data