Operation Manual – Multicast Protocol
H3C S3610&S5510 Series Ethernet Switches
Chapter 6 PIM Configuration
6-53
2)
Check that PIM is enabled on the interfaces, especially on the RPF interface. Use
the
display pim interface
command to view the PIM information on each
interface. If PIM is not enabled on the interface, use the
pim dm
or
pim sm
command to enable PIM-DM or PIM-SM.
3) Check that the RPF neighbor is a PIM neighbor. Use the
display pim neighbor
command to view the PIM neighbor information.
4)
Check that PIM and IGMP are enabled on the interfaces directly connecting to the
multicast source and to the receivers.
5)
Check that the same PIM mode is enabled on related interfaces. Use the
display
pim 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 PIM mode is enabled on all the routers in the entire network.
Make sure that the same PIM mode is enabled on all the routers: PIM-SM on all
routers, or PIM-DM on all routers. In the case of PIM-SM, also check that the BSR
and RP configurations are correct.
6.8.2 Multicast Data Abnormally Terminated on an Intermediate Router
I. Symptom
An intermediate router can receive 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 PIM routing table.
II. Analysis
z
If a multicast forwarding boundary has been configured through the
multicast
boundary
command, any multicast packet will be kept from crossing the boundary,
and therefore no routing entry can be created in the PIM routing table.
z
In addition, the
source-policy
command is used to filter received multicast
packets. If the multicast data fails to pass the ACL rule defined in this command,
PIM cannot create the route entry, either.
III. Solution
1) Check the multicast forwarding boundary configuration. Use the
display
current-configuration
command to check the multicast forwarding boundary
settings. Use the
multicast boundary
command to change the multicast
forwarding boundary settings.
2) Check the multicast filter configuration. Use the
display current-configuration
command to check 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.