HP VPN Firewall Appliances Network Management Configuration Guide

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Solution
1. Use the display current-configuration command to verify the multicast forwarding boundary
settings. Use the multicast boundary command to change the multicast forwarding boundary
settings.
2. Use the display current-configuration command to verify the multicast filter configuration. Change
the ACL rule defined in the source-policy command so that the source/group address of the
multicast data can pass ACL filtering.
RPs cannot join SPT in PIM-SM
Symptom
An RPT cannot be established correctly, or the RPs cannot join the SPT to the multicast source.
Analysis
• As the core of a PIM-SM domain, the RPs serve specific multicast groups. Multiple RPs can coexist
in a network. Make sure the RP information on all routers is exactly the same and that a specific
group is mapped to the same RP. Otherwise, multicast forwarding fails.
• If the static RP mechanism is used, the same static RP command must be executed on all the routers
in the entire network. Otherwise, multicast forwarding fails.
Solution
1. Use the display ip routing-table command to verify that a route to the RP is available on each
router.
2. Use the display pim rp-info command to verify that the dynamic RP information is consistent on all
routers.
3. Use the display pim rp-info command to verify that the same static RP address has been configured
on all the routers in the entire network.
RPT establishment failure or source registration failure 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
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
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 the RP information on all routers is exactly the
same, a specific group G is mapped to the same RP, and unicast routes are available to the RP.