Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
104
(2) Items to check for BSR
The following table shows the items to check when the Switch is used as BSR in an IPv6 PIM-SM
network configuration.
Table 3-46: Items to check for BSR
(3) Items to check for the rendezvous point router
The following table shows the items to check when the Switch is used as a rendezvous point router
in an IPv6 PIM-SM network configuration.
Table 3-47: Items to check for the rendezvous point router
15 Check whether the number of the multicast routing
information entries or multicast forwarding entries
exceeds its upper limit.
For the multicast routing information:
show ipv6 mroute
For the multicast forwarding entries:
show ipv6 mcache
netstat multicast
If a warning is displayed, check whether an
unexpected multicast routing information entry or
unexpected multicast forwarding entry has been
created. If many negative caches are found among the
multicast forwarding entries, check whether there is a
terminal that is sending unnecessary packets.
No. Items to check and commands Action
1 Make sure the Switch is a BSR candidate.
show ipv6 pim bsr
If the Switch is not a BSR candidate, check and modify
the configuration so that the Switch can work as a BSR
candidate. If an address is not set for the loopback
interface, the Switch does not work as a BSR
candidate. Also make sure that a loopback interface
address is set.
2 Make sure the Switch is used as BSR.
show ipv6 pim bsr
If the Switch is not used as BSR, check the priorities of
other BSR candidates. A larger value represents a
higher priority. If the priority is the same among BSR
candidates, the BSR candidate that has the highest
BSR address becomes BSR.
No. Items to check and commands Action
1 Make sure the Switch is a rendezvous point candidate
for the forwarding target group address.
show ipv6 pim rp-mapping
If the Switch is not a rendezvous point candidate for
the forwarding target group address, check and modify
the configuration so that the Switch can work as a
rendezvous point candidate for the forwarding target
group address. If an address is not set for the loopback
interface, the Switch does not work as a rendezvous
point candidate. Also make sure that a loopback
interface address is set.
2 Make sure the Switch is the rendezvous point for the
forwarding target group address.
show ipv6 pim rp-hash <Group Address>
If the Switch is not the rendezvous point, check the
priorities of other rendezvous point candidates. A
smaller value represents a higher priority. If the
priority of another rendezvous point candidate is
higher than that of the Switch, the Switch does not
work as the rendezvous point. If the priority is the
same between another candidate and the Switch, they
are assigned to a different group address due to the
protocol specification, and the Switch might not work
as the rendezvous point for the target group. If you
want to use the Switch as the rendezvous point, set a
higher priority for the Switch than other rendezvous
point candidates.
No. Items to check and commands Action