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20
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ONFIGURING
P
ROTOCOL
I
NDEPENDENT
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ULTICASTING
R
OUTING
20.1 PIM Configuration
Protocol Independent Multicast (PIM) protocols route multicast packets to multicast groups. PIM is protocol
independent because it can leverage whichever unicast routing protocol is used to populate unicast routing table. There
are two modes of PIM protocol – Dense mode (DM) and Sparse mode (SM). Black Box supports SM only.
PIM-DM floods multicast traffic throughout the network initially and then generates prune messages as required.
PIM-SM attempts to send multicast data only to networks which have active receivers. This is achieved by having a
common Rendezvous Point (RP) known to the senders and receivers and by forming shared trees from the RP to the
receivers.
PIM-SM is described in RFC 2362.
20.1.1PIM Commands
The general PIM commands supported in this release are:
Global parameters
Enable PIM Blackbox/configure/ip> pim
Configure PIM mode Blackbox/configure/ip/pim> mode [sparse | dense]
Configure Assert Holdtime Blackbox/configure/ip/pim>assert-holdtime <time>
Configure Hello Interval Blackbox/configure/ip/pim>hello-interval <time>
Configure Hello Holdtime Blackbox/configure/ip/pim>hello-holdtime <time>
Configure Hello priority Blackbox/configure/ip/pim>hello-priority <value>
Configure Join/Prune
Holdtime
Blackbox/configure/ip/pim>join-prune-holdtime <time>
Configure Join /Prune
Interval
Blackbox/configure/ip/pim>join-prune-interval <time>
Configure MRT Period Blackbox/configure/ip/pim>mrt-period <time>