NEC IP8800/S2400 User Manual
3.
Troubleshooting Functional Failures in Operation
87
(3) 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-SSM network
configuration.
configuration.
Table 3-46: first-hop-router Check Items
3.11.4
Multicast Data Is Double-relayed on IPv6 PIM-SSM Network
If multicast data is double-relayed in the IPv6 PIM-SSM network configuration, check the settings of each router and
set the configuration to run PIM on the interface for a network having multiple routers.
set the configuration to run PIM on the interface for a network having multiple routers.
If double-relay still continues, check the following:
8
Check to see if IGMP snooping is set to the port in which static
group join function is running.
show mld-snooping
group join function is running.
show mld-snooping
When MLD snooping is set, confirm the following:
• Chec to see if the forwarding port is set as a multicast port
• Chec to see if the forwarding port is set as a multicast port
for MLD snooping
• See "
9
Confirm that no interface in abnormal state is detected.
show ipv6 mld interface
show ipv6 mld interface
See notices and confirm that warning information is not
output. When warning information is output, check the
following:
• L: The number of join request exceeded expected
output. When warning information is output, check the
following:
• L: The number of join request exceeded expected
maximum number. Check to see the number of connected
users.
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.
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.
defined to store source per message in MLDv2. Check the
settings of the participant.
No.
Troubleshooting Steps and Command
Action
1
Confirm that this system is directly connected to the multicast
sender.
sender.
If not, check the network configuration.
2
Confirm that PIM or MLD is running on the interface
connected to the multicast sender.
show ipv6 pim interface
show ipv6 mld interface
connected to the multicast sender.
show ipv6 pim interface
show ipv6 mld interface
If not running, check the configuration and set the
configuration to run PIM or MLD.
configuration to run PIM or MLD.
3
Check to see if multicast data arrives at this system.
If multicast data has not arrived, check the setting of the
multicast sender.
multicast sender.
4
Check to see if the group address and source address in
multicast data match those in the multicast routing
information.
show ipv6 mroute
show netstat multicast
multicast data match those in the multicast routing
information.
show ipv6 mroute
show netstat multicast
If the group address and source address do not match, check
the settings of the multicast sender and last-hop-router.
the settings of the multicast sender and last-hop-router.
No.
Troubleshooting Steps and Command
Action