3.11 Ipv6 Multicast Routing Communication Failure; Communication On Ipv6 Pim-Sm Network Is Disabled - NEC IP8800/S2400 Series Troubleshooting Manual

3.11 IPv6 Multicast Routing Communication Failure

Actions to be taken if IPv6 multicast communication failures occur on this system are described below.
3.11.1

Communication on IPv6 PIM-SM Network Is Disabled

If multicast relay on the IPv6 PIN-SM network configuration is disabled, isolate the cause according to the failure
analysis method below.
The figure below illustrates a network example of IPv6 PIM-SM.
Figure 3-16: Example of IPv6 PIM-SM Network
Multicast
Sender
first-hop-router
Multicast
data
Note
• BSR: This router delivers rendezvous point information (for details, see the manual "Configuration Settings").
• Rendezvous point router: This router relays the packets, for which the relay destination is not determined, toward
the multicast receiver (for details, see the manual "Configuration Settings").
• first-hop-router: This router is directly connected to the multicast sender.
• last-hop-router: This router is directly connected to the multicast receiver.
(1) Common check items
The table below shows the common check items for all system in the IPv6 PIM-SM network configuration.
Table 3-38: Common Check Items
No. Troubleshooting Steps and Command
1 Confirm that the use of multicast function is designated (ipv6
multicast routing) in the configuration.
show running-config
2 Confirm that the address of the loopback interface is set in the
configuration.
show running-config
3 Confirm that PIM is running on one or more interfaces.
show ipv6 pim interface
4 Confirm that MLD snooping is set to the interface with PIM
enabled.
show mld-snooping
3.
Troubleshooting Functional Failures in Operation
BSR and
Participation in
rendezvous point router
the MLD group
last-hop-router
Participation in
the MLD group
If the use of multicast function is not designated, correct the
configuration.
If the address of the loopback interface is not set, correct the
configuration.
If PIM is not running, check the configuration. Set PIM to run
on one or more interfaces.
When MLD snooping is set, confirm the following:
• Confirm that multicast router port for MLD snooping is set
to the port to which neighboring router connects.
• See "3.5.5 Multicast Relay by MLD snooping Is
Multicast
Receiver
Multicast
Receiver
Action
Disabled."
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