H3C Technologies H3C S7500E Series Switches - Manual (Page 401)

13-50
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
z 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 therefore no routing entry can be created in the IPv6 PIM routing table.
z In addition, the source-policy command is used to filter received IPv6 multicast packets. If
the IPv6 multicast data fails to pass the 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 Unable to 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
z 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 a specific group is mapped to the same RP. Otherwise, IPv6
multicast will fail.
z 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.