Manual

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Москва, Новозаводская ул., 18, стр. 1
209
Switch(config)#ip pim multicast-routing
Switch(config)#interface vlan 1
Switch(Config-if-Vlan1)# ip address 12.1.1.2 255.255.255.0
Switch(Config-if-Vlan1)# ip pim dense-mode
Switch(Config-if-Vlan1)#exit
Switch(config)#interface vlan 2
Switch(Config-if-Vlan2)# ip address 20.1.1.1 255.255.255.0
Switch(Config-if-Vlan2)# ip pim dense-mode
At the same time, you should pay attention to the configuration of Unicast Routing Protocol,
assure that each device can communicate with each other in the network layer, and be able to
implement dynamic routing update in virtue of Unicast Routing Protocol.
28.2.4 PIM-DM Troubleshooting
In configuring and using PIM-DM Protocol, PIM-DM Protocol might not operate normally
caused by physical connection or incorrect configuration. Therefore, the user should pay
attention to the following issues:
To assure that physical connection is correct
To assure the Protocol of Interface and Link is UP (use show interface command)
To assure PIM Protocol is enabled in Global Mode (use ipv6 pim multicast-routing )
Enable PIM-DM Protocol on the interface (use ipv6 pim dense-mode command)
Multicast Protocol requires RPF Check using Unicast routing; therefore the correctness of
Unicast routing must be assured beforehand
If all attempts including Check are made but the problems on PIM-DM can’t be solved yet, then
use debug commands such as debug pim please, and then copy DEBUG information in 3
minutes and send to Technology Service Center.
28.3 PIM-SM
28.3.1 Introduction to PIM-SM
PIM-SM(Protocol Independent Multicast, Sparse Mode) is Protocol Independent Multicast
Sparse Mode. It is a Multicast Routing Protocol in Sparse Mode and mainly used in big scale
network with group members distributed relatively sparse and wide-spread. Unlike the
Flooding & Prune of Dense Mode, PIM-SM Protocol assumes no host needs receiving
Multicast data packets. PIM-SM router transmits Multicast Data Packets to a host only if it
presents explicit requirement.
By setting RP (Rendezvous Point) and BSR (Bootstrap Router), PIM-SM announce Multicast
packet to all PIM-SM routers and establish RPT (RP-rooted shared tree) based on RP using
Join/Prune message of routers. Consequently the network bandwidth occupied by data