Multicast Data Is Double-Relayed On Ipv6 Pim-Sm Network - NEC IP8800/S2400 Series Troubleshooting Manual

3.
Troubleshooting Functional Failures in Operation
No. Troubleshooting Steps and Command
4 Confirm that MLD snooping is set to the interface with PIM
enabled.
show mld-snooping
5 Confirm that no interface in abnormal state is detected.
show ipv6 mld interface
(5) first-hop-router check items
The table below shows the items to be checked when this system is the first-hop-router in the IPv6 PIM-SM network
configuration.
Table 3-42: first-hop-router Check Items
No. Troubleshooting Steps and Command
1 Confirm that this system is directly connected to the multicast
sender.
2 Confirm that PIM or MLD is running on the interface
connected to the multicast sender.
show ipv6 pim interface
show ipv6 mld interface
3 Confirm that the multicast relay routing information exists.
show ipv6 mroute
3.11.2

Multicast Data Is Double-relayed on IPv6 PIM-SM Network

If multicast data is double-relayed in the IPv6 PIM-SM network configuration, check the settings of each router and set
the configuration to run PIM on the interface for a network having multiple routers.
If double-relay still continues, check the following:
Table 3-43: Check Items When Double-relay Continues
No. Troubleshooting Steps and Command
1 Check the PIM neighboring information on the interface of the
network having multiple routers.
show ipv6 pim neighbor
84
Action
When MLD snooping is set, confirm the following:
• Confirm that multicast router port for MLD snooping is set
to the forwarding port.
• See "3.5.5 Multicast Relay by MLD snooping Is
See notices and confirm that warning information is not
output. When warning infromation is output, check the
following:
• L: The number of join request exceeded expected
maximum number. Check to see the number of connected
users.
• Q: The MLD version of neighboring router is different.
Adjust it to the MLD version.
• R: A user who transmitted reports unreceivable at the
present settings exists. Change the MLD version of this
system or confirm the setting of the participant.
• S: Some of the participant information are being discarded
because the number of source exceeded the upper limit
defined to store source per message in MLDv2. Check the
settings of the participant.
Action
If not, check the network configuration.
If not running, check the configuration and set the
configuration to run PIM or MLD.
If the multicast routing information does not exist, confirm
that multicast data source address is the network address of
the interface directly connected to the multicast sender.
Action
If the neighboring router is not displayed, check the
following:
• Confirm that PIM is running on the interface connected to
the neighboring router using the show ipv6 pim
command with "interface" parameter specified.
• Confirm in the configuration that suppression of protocol
packet relay by filtering, etc. is not provided.
• Verify the settings of the neighboring router.
Disabled."