User Manual UMN:CLI
V5808
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• Register
Register messages are sent by the DR to the RP when a multicast packet needs to
be transmitted on the RPT. These messages may contain the encapsulated multicast
traffic. Both register and register-stop messages are unicast.
• Register-stop
When receiving the register-stop message, routers stop sending register messages.
These messages are sent from the RP to the sender of the register messages.
• Join/prune
Join/prune messages are sent by routers towards upstream sources or RPs. Join
messages are sent to receive the multicast traffic by building shared trees (RPT) or
source trees (SPT). Prune messages are sent to prune established distribution trees
when there are no more interests in the traffic.
• Bootstrap
The bootstrap router (BSR) sends bootstrap messages to elect the Rendezvous Point
(RP), which contain a set of the information for each candidate RP (RP-set).
• Assert
Assert messages are used to resolve forwarding conflicts among routers.
• Candidate RP advertisement
Each candidate RP unicasts these messages containing its own information to the
BSR. The BSR then includes a set of that information in the bootstrap message.
10.3.2.1 PIMv6 Mode
To enable PIM-SM on an interface, use the following command.
Enables PIM-SM on an interface.
Disables PIM-SM on an interface.
You can also enable PIM-SM as the passive mode. The passive mode operation is for
local members. The passive mode disables sending/receiving PIM packets on an
interface, allowing only MLD mechanism to be active.
To enable PIM-SM passive mode on an interface, use the following command.
ipv6 pim sparse-mode passive
Enables PIM-SM passive mode on an interface.
no ipv6 pim sparse-mode
passive
Disables PIM-SM passive mode on an interface.
10.3.2.2 DR Priority
In PIM-SM, the designated router (DR) is normally the first-hop router of receivers (hosts),
which is responsible to periodically send PIM join/prune messages toward the RP to
inform it of the host group membership.
When there are multiple routers on the same subnet, one of them must be selected to act
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