An Rpt Cannot Be Established Or A Source Cannot Register In Pim-Sm - HP A8800 Configuration Manual

An RPT cannot be established or a source cannot register in
PIM-SM
Symptom
C-RPs cannot unicast advertise messages to the BSR. The BSR does not advertise bootstrap messages
containing C-RP information and has no unicast route to any C-RP. An RPT cannot be established correctly,
or the DR cannot perform source registration with the RP.
Analysis
The C-RPs periodically send C-RP-Adv messages to the BSR by unicast. If a C-RP has no unicast route
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to the BSR, the BSR cannot receive C-RP-Adv messages from that C-RP and the bootstrap messages
of the BSR do not contain the information of that C-RP.
In addition, if the BSR does not have a unicast route to a C-RP, it discards the C-RP-Adv messages
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from that C-RP. Therefore, the bootstrap messages of the BSR do not contain the information of that
C-RP.
The RP is the core of a PIM-SM domain. Make sure that the RP information on all routers is exactly
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the same, a specific group G is mapped to the same RP, and unicast routes are available to the RP.
Solution
1. Use the display ip routing-table command to verify that routes to the RP and the BSR are available
on each router and that a route between the RP and the BSR is available. Make sure that each C-RP
has a unicast route to the BSR, the BSR has a unicast route to each C-RP, and all the routers in the
entire network have a unicast route to the RP.
2. PIM-SM needs the support of the RP and BSR. Use the display pim bsr-info command to verify that
the BSR information exists on each router, and then use the display pim rp-info command to verify
that the RP information is correct on each router.
3. Use the display pim neighbor command to verify that the normal PIM neighboring relationships
have been established among the routers.
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