Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
Search instead for
Did you mean:
Some of the Multicast Basics
In this document we will discuss few things common in Unicast of the Multicast Basics.
Something that is common to the Unicast and Broadcast:
the count of the destination clients "will always" remain the same, over multiple instants of time
Example For Unicast Communication
the number of clients in a unicast communication will always be two.The count of destination clients in unicast communication will always be 1.
Example For Broadcast Communication
the number of clients in a broadcast domain is X, the count of destination clients in broadcast will always be Xthe number of clients in a broadcast domain is X, the count of destination clients in broadcast will always be Xthe number of clients in a broadcast domain is Y, the count of destination clients in broadcast will always be Y
Example For Multicast Communication
the count of the destination clients "may never"remain the same, over multiple instants of time
Client doesn't know who the server is
Server doesnt know who the client is
both know, who the group is: multicast group, which has ip and mac address
Multicast Group ensures
how to make server ignore, who all the clients are , who are interested to listen to what the server is saying
how to make client ignore, who the sever is, who is sending the information that the clients want to listen to
Controller has to ensure that it is able to IDENTIFY all those clients who want to listen to some mCast data stream. When IGMP Snooping is enabled, the WLC logs each IGMP Join Request and IGMP Join Response in a database called IGMP Report.
Corresponding to the unique combination of EACH CLIENT and the mCastGroup (in which the client is interested to
listen), the WLC makes a unique MGID entry for EACH CLIENT. This IGMP report is sent to the infrastructure switch
(to which the WLC is connected). This report is sent (sourced) from the VLAN (of the client) to the switch.
if multicast should be supported by the wired network, need to ensure the following(in the wired network):
[(a)ensure that the device and (b)the concerned n/w interface is configured for multicast)]
1. Need to ensure that configuration is done
2. Need to ensure that we can verify if configuration has been done
1.= (a) ip multicast-routing // Multicast routing should be enabled Globally in the switch/router
(b) interface Vlan50
ip pim dense-mode // PIM should be enabled on each interface corresponding to the N/w
// where mcast should be working fine in the wired network
2.= (a) sh ip mroute
Outgoing interface list:
(b) sh ip pim interface vlan 50
Address Interface Ver/ Nbr Query DR
DR Mode Count Intvl Prior10.105.135.136 Vlan50 v2/D 0 30 1 10.105.135.136
Now, that we know how to enable multicast in a given wired network, we need to know that how do we find that on