H3C Technologies H3C S10500 Series Switches - Manual (Page 446)

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5. Check that the same IPv6 PIM mode is enabled on related interfaces. Use the display pim ipv6
interface verbose command to check whether the same PIM mode is enabled on the RPF interface
and the corresponding interface of the RPF neighbor router.
6. Check that the same IPv6 PIM mode is enabled on all the routers in the entire network. Use the
display current-configuration command to check the IPv6 PIM mode information on each interface.
Make sure that the same IPv6 PIM mode is enabled on all the routers: IPv6 PIM-SM on all routers,
or IPv6 PIM-DM on all routers.
IPv6 multicast data abnormally terminated on an intermediate
router
Symptom
An intermediate router can receive IPv6 multicast data successfully, but the data cannot reach the last
hop router. An interface on the intermediate router receives data, but no corresponding (S, G) entry is
created in the IPv6 PIM routing table.
Analysis
• If an IPv6 multicast forwarding boundary has been configured through the multicast ipv6 boundary
command, any IPv6 multicast packet will be kept from crossing the boundary, and no routing entry
can be created in the IPv6 PIM routing table.
• In addition, the source-policy command filters received IPv6 multicast packets. If the IPv6 multicast
data fails to pass the IPV6 ACL rule defined in this command, IPv6 PIM cannot create the route entry
either.
Solution
1. Check the IPv6 multicast forwarding boundary configuration. Use the display
current-configuration command to check the IPv6 multicast forwarding boundary settings. Use the
multicast ipv6 boundary command to change the IPv6 multicast forwarding boundary settings.
2. Check the IPv6 multicast filter configuration. Use the display current-configuration command to
check the IPv6 multicast filter configuration. Change the IPv6 ACL rule defined in the source-policy
command so that the source/group address of the IPv6 multicast data can pass ACL filtering.
RPS cannot join SPT in IPv6 PIM-SM
Symptom
An RPT cannot be established correctly, or the RPs cannot join the SPT to the IPv6 multicast source.
Analysis
• As the core of an IPv6 PIM-SM domain, the RPs serves specific IPv6 multicast groups. Multiple RPs
can coexist in a network. Make sure that the RP information on all routers is exactly the same and
that a specific group is mapped to the same RP. Otherwise, IPv6 multicast will fail.
• In the case of the static RP mechanism, the same RP address must be configured on all the routers
in the entire network, including static RPs, by means of the static RP command. Otherwise, IPv6
multicast will fail.
Solution
1. Check that a route is available to the RP. Carry out the display ipv6 routing-table command to
check whether a route is available on each router to the RP.