No Unicast Route Between Bsr And C-Rps In Ipv6 Pim-Sm Domain - 3Com MSR 50 Series Configuration Manual

No Unicast Route
Between BSR and C-RPs
in IPv6 PIM-SM Domain
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
register with the RP.
Analysis
C-RPs periodically send advertisement messages to the BSR by unicast. If a C-RP
■
does not have a route to the BSR, the BSR will be unable to receive the
advertisements from the C-RP, and therefore the bootstrap messages of the
BSR will not contain the information about that C-RP.
The RP is the core of an IPv6 PIM-SM domain. Make sure that the RP
■
information on all routers is exactly the same, a specific group is mapped to the
same RP, and a unicast route is available to the RP.
Solution
1 Check whether routes to C-RPs, the RP and the BSR are available. Carry out the
display ipv6 routing-table command to check whether routes are available on
each router to the RP and the BSR, and whether a route is available between the
RP and the BSR. 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 Check the RP and BSR information. IPv6 PIM-SM needs the support of the RP and
BSR. Use the display pim ipv6 bsr-info command to check whether the BSR
information is available on each router, and then use the display pim ipv6
rp-info command to check whether the RP information is correct.
3 View the IPv6 PIM neighboring relationships. Use the display pim ipv6 neighbor
command to check whether the normal neighboring relationships have been
established among the routers.
Troubleshooting IPv6 PIM Configuration 1277