HP 3500YL - Manual (Page 124)

PIM-SM (Sparse Mode)
Configuration Steps for PIM-SM
PIM-SM and PIM-DM. These two features cannot both be enabled on the
same router at the same time.
Supporting PIM-SM Across a PIM Domain. To properly move multicast
traffic across a PIM-SM domain, all routers in the domain must be configured
to support PIM-SM. That is, a router without PIM-SM capability blocks routed
multicast traffic in a PIM-SM domain.
Configuration Steps for PIM-SM
This process assumes that the necessary VLANs and IP addressing have
already been configured on the routing switch.
N o t e The switches covered by this guide do not support PMBR operation in the
current software release.
Planning Considerations
■ Where multiple routers are available to operate as the DR for a given
source, set the DR priority on each router according to how you want the
router used.
■ Determine whether there are any bandwidth considerations that would
call for disabling SPT operation. (If any routers in the domain have SPT
operation disabled, then it should be disabled on all RPs in the domain.
Refer to “Operating Rules and Recommendations” on page 4-19.)
■ Determine the routers to configure as C-BSRs. In many applications, the
best choice may be to configure all routers in the domain as candidates
for this function.
■ Determine the multicast group support you want on each C-RP and any
static-RPs in the domain. The easiest option is to enable C-RP to support
all possible multicast groups on all routers in the domain. However, if
there are traffic control considerations you want to apply, you can limit
specific multicast groups to specific routers and/or set priorities so that
default traffic routes support optimum bandwidth usage.
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