Pim Dm - TP-Link JetStream T2700G-28TQ User Manual

 Configure Switch A
Steps Operation
1 Enable IP multicast
routing.
2 Enable IGMP on
user-side interface.
 Configure Switch B
Steps Operation
1 Enable IP multicast
routing.
2 Enable IGMP on
user-side interface.
 Configure Switch C
Steps Operation
1 Enable IP multicast
routing.
2 Enable IGMP on
user-side interface.

11.3 PIM DM

PIM (defined in RFC 3973) is a popular multicast routing protocol within the AS. Instead of relying
on one specific unicast routing protocol, PIM uses the static routing or unicast routing table
generated by any unicast routing protocol (including RIP, OSPF, IS-IS, BGP etc) to perform routing
for IP multicast data.
Unlike some other multicast routing protocols, PIM doesn't update routing information between
routers or maintain an independent route forwarding table. PIM uses the RPF (Reverse Path
Forwarding) check mechanism to forward the multicast data.
There are two types of multicast routing and forwarding tables in the multicast implementation:
All the multicast route information will be summarized as a general multicast routing-table;

The multicast forwarding-table is used to control the forwarding of the multicast packets

directly.
The multicast routing table consists of a group of (S, G) entries, and (S, G) route represents
routing information from source S to group G. If the router supports multiple multicast routing
protocols, its multicast routing table will contain multicast routes generated from multiple protocols.
The router will chose the optimal multicast route according to multicast routing and forwarding
strategy, and send it to the multicast forwarding table.
The multicast routing protocol uses the RPF mechanism to establish the multicast routing entries,
thus to guarantee the multicast data being transferred in the correct path.
Note
On page Multicast Routing→ Global Config→ Global Config,
enable the multicast routing function.
On page Multicast Routing→ IGMP→ Interface Config, enable
IGMP (version 3) on interface VLAN 10.
Note
On page Multicast Routing→ Global Config→ Global Config,
enable the multicast routing function.
On page Multicast Routing→ IGMP→ Interface Config, enable
IGMP (version 2) on interface VLAN 20.
Note
On page Multicast Routing→ Global Config→ Global Config,
enable the multicast routing function.
On page Multicast Routing→ IGMP→ Interface Config, enable
IGMP (version 2) on interface VLAN 20.
240