3com S7906E インストール手順
1-9
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The reset command clears the information in the IPv6 multicast routing table or the multicast
forwarding table, and thus may cause transmission failure of IPv6 multicast information.
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When a routing entry is deleted from the IPv6 multicast routing table, the corresponding forwarding
entry will also be deleted from the IPv6 multicast forwarding table.
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When a forwarding entry is deleted from the IPv6 multicast forwarding table, the corresponding
routing entry will also be 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, there is no
member information about the IPv6 multicast group (G) on the immediate 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 there is no
corresponding (S, G) entry in the IPv6 PIM routing table.
Analysis
The multicast ipv6 boundary command is used to filter 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 is used to filter 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
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 address of the IPv6 multicast packets and the IPv6 multicast group
address can both match the IPv6 ACL rule.
Check the configuration of the multicast filter. Use the display current-configuration command to
view the configuration of the IPv6 multicast filter, and change the IPv6 ACL rule used in the
source-policy command so that the source address of the IPv6 multicast packets and the IPv6
multicast group address can both match the IPv6 ACL rule.