Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
105
(4) Items to check for last-hop-router
The following table shows the items to check when the Switch is used as
last-hop-router in an
IPv6 PIM-SM network configuration.
Table 3-48: Items to check for last-hop-router
(5) Items to check for first-hop-router
The following table shows the items to check when the Switch is used as
first-hop-router in an
IPv6 PIM-SM network configuration.
Table 3-49: Items to check for first-hop-router
No. Items to check and commands Action
1 Make sure that MLD is running on the interface
connected to the multicast receivers.
show ipv6 mld interface
If MLD is not running, check and modify the
configuration so that MLD runs on the interface.
2 Make sure that the multicast receivers participate in the
forwarding target group through MLD.
show ipv6 mld group
If a multicast receiver does not participate in the
forwarding target group, check the multicast receiver
settings.
3 If the interface in which the forwarding target group
participates exists and PIM runs, make sure that the
Switch is DR.
show ipv6 pim interface
If the Switch is not DR, check the DR of the
forwarding target interface.
4 Check whether MLD snooping is set for the interface
on which the static group participation functionality is
used.
show mld-snooping
If MLD snooping is set, check the following:
• Check whether the multicast router port for MLD
snooping is set for the destination port.
• See 3.6.5 Multicast forwarding by MLD snooping
is not possible.
5 Check whether any anomaly has been detected on any
interface.
show ipv6 mld interface
Make sure that no warning information is displayed for
Notice.
If warning information is displayed, check the
following:
•
L: More participation requests than the expected
maximum number have occurred. Check the
number of connected users.
• Q: The MLD version is different from that on the
neighboring router. Use the same MLD version.
•
R: A user is sending a report that cannot be
received with the current settings. Change the
MLD version on the Switch, or check the settings
of the participation user.
•
S: Parts of the participation information have been
discarded because the number of sources stored in
a message exceeds the maximum number for
MLDv2. Check the settings of the participation
user.
No. Items to check and commands Action
1 Make sure that the Switch is directly connected to the
multicast sender.
If the Switch is not connected directly, check the
network configuration.
2 Make sure that PIM or MLD is running on the interface
connected to the multicast sender.
show ipv6 pim interface
show ipv6 mld interface
If PIM or MLD is not running, check and modify the
configuration so that PIM or MLD runs on the
interface.