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Clear forwarding entries from the IPv6
multicast forwarding table
reset multicast ipv6 forwarding-table { { ipv6-
source-address [ prefix-length ] | ipv6-group-
address [ prefix-length ] | incoming-interface {
interface-type interface-number | register } } * |
all }
Available in
user view
Clear routing entries from the IPv6
multicast routing table
reset multicast ipv6 routing-table { { ipv6-source-
address [ prefix-length ] | ipv6-group-address [
prefix-length ] | incoming-interface { interface-type
interface-number | register } } * | all }
Available in
user view
NOTE:
For more information about designated forwarder (DF), see the chapter “IPv6 PIM configuration.”
CAUTION:
The reset command clears the information in the IPv6 multicast routing table or the multicast
forwarding table and might cause transmission failure of IPv6 multicast information.
When a routing entry is deleted from the IPv6 multicast routing table, the corresponding forwarding
entry is also deleted from the IPv6 multicast forwarding table.
When a forwarding entry is deleted from the IPv6 multicast forwarding table, the corresponding
routing entry is also deleted from the IPv6 multicast routing table.
Troubleshooting IPv6 multicast policy configuration
Abnormal termination of IPv6 multicast data
Symptom
• A host sends an MLD report announcing its joining an IPv6 multicast group (G). However, no
member information about the IPv6 multicast group (G) exists on the intermediate router. The
intermediate router can receive IPv6 multicast packets successfully, but the packets cannot reach the
stub network.
• The interface of the intermediate router receives the IPv6 multicast packets, but no corresponding
(S, G) entry exists in the IPv6 PIM routing table.
Analysis
• The multicast ipv6 boundary command filters IPv6 multicast packets received on an interface. If an
IPv6 multicast packet fails to match the IPv6 ACL rule of this command, IPv6 PIM will create no
routing entry.
• In addition, the source-policy command in IPv6 PIM filters received IPv6 multicast packets. If an IPv6
multicast packet fails to match the IPv6 ACL rule of this command, IPv6 PIM will not create a routing
entry, either.
Solution
1. Use the display current-configuration command to display the IPv6 ACL rule configured on the
multicast forwarding boundary. Change the IPv6 ACL rule used in the multicast ipv6 boundary
command so that the source IP address of the IPv6 multicast packets and the IPv6 multicast group
address can both match the IPv6 ACL rule.
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