HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual page 551

Event
• The router receives an IGMP join
for a new or inactive group.
• The router receives a PIM (*, G)
join for a new group.
The router receives an IGMP join for
a group. The router has an (S, G)
entry for the group for which the RP-
bit is set and the outgoing interface
list is empty.
The router receives an PIM (*, G) join
for a group. The router has an (S, G)
entry for the group for which the RP-
bit is set and the outgoing interface
list is empty.
The router receives a PIM join for
traffic from a new source or from a
source for which the (S, G) outgoing
interface list is empty.
The last outgoing interface is
deleted from a (*, G) entry.
The last outgoing interface is
deleted from an (S, G) entry (RP-bit
not set).
A DR receives multicast traffic from
a source in a directly connected
subnet.
The router receives multicast traffic
from a new remote source and
creates a new (S, G) entry.
Table 11-1. Triggered Join/Prune Packets
Action
The router joins the RP tree.
Currently, the router is not
forwarding multicasts because
its neighbors are using an SP tree
that does not include this router.
When the router receives the
IGMP join, it joins the SP tree so
that it can deliver the multicasts to
the new host.
Currently, the router is not
forwarding multicasts because
its neighbors are using an SP tree
that does not include this router.
When the router receives the join,
it forwards it towards the RP so
that the downstream router can
reach the RP.
The router joins an SP tree.
The router leaves the RP tree.
The router leaves the SP tree.
The router leaves the RP tree for
traffic from this source. It will be
the root of the SP tree.
The router determines whether it
has a better connection to the
source than through the RP. If it
does, it begins to establish an SP
tree.
Configuring Multicast Support with PIM-SM
Packet Includes Sent to
join for the group with upstream RP neighbor
a wildcard source
join for the group with upstream SP neighbor
a specific source
address
join for the group with upstream RP neighbor
a wildcard source
join for the group with upstream SP neighbor
a specific source
address
prune for the group upstream RP neighbor
with a wildcard source
prune for the group upstream SP neighbor
with a specific source
address
prune for the group upstream RP neighbor
with a specific source
address
join for the group with upstream SP neighbor
a specific source
address
Overview
11-23