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3. Troubleshooting Functional Failures in Operation
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(2) BSR check items
The table below shows the items to be checked when this system is BSR in the IPv6 PIM-SM network configuration.
5 Confirm in the configuration that suppression of protocol
packet and multicast packet relay through filtering, etc. is not
provided on the interface that allows PIM and MLD to run.
show running-config
If suppression of protocol packet and multicast packet relay is
provided, correct the configuration.
6 Check the PIM neighboring information.
show ipv6 pim neighbor
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.
• Verify the settings of the neighboring router.
7 Check to see if the unicast route to the multicast data sender
exists.
show ipv6 route
If the unicast route does not exist, see "3.10 IPv6 Unicast
Routing Communication Failure."
8 Confirm that PIM is running on the interface to the next hop
address for the multicast data sender.
show ipv6 pim interface
If PIM is not running, check the configuration. Set PIM to run
on the interface connected to the next hop address for the
multicast data sender.
9 Confirm that the PIM-SSM group addresses do not contain the
relay target group address, referring to the configuration.
show running-config
If the PIM-SSM group addresses contain the relay target
group address, correct the configuration.
10 Confirm that BSR is determined. However, this confirmation
is not required if the rendezvous point for the relay target group
address is a static rendezvous point.
show ipv6 pim bsr
If BSR is not determined, check to see if the unicast route to
BSR exists. If the unicast route does not exist, see "3.10 IPv6
Unicast Routing Communication Failure."
If the unicast route exists, check the BSR setting. If the BSR
is this system, see "(2)BSR check items."
11 Confirm that the rendezvous point is determined.
show ipv6 pim rp-mapping
If the rendezvous point is not determined, check to see if the
unicast route to the rendezvous point exists. If the unicast
route does not exist, see "3.10 IPv6 Unicast Routing
Communication Failure."
If the unicast route exists, check the rendezvous point setting.
If the rendezvous point is this system, see "(3)Rendezvous
point router check items."
12 Confirm that the rendezvous point group addresses contain the
relay target group address.
show ipv6 pim rp-mapping
If the relay target group address is not contained, check the
rendezvous point setting.
13 Confirm that the multicast relay entry exists.
show ipv6 mcache
If the multicast relay entry does not exist, confirm that
multicast data has arrived at the upstream port. If multicast
data has not arrived, check the setting of the multicast sender
or upstream router.
14 Confirm that the multicast routing information exists.
show ipv6 mroute
If the multicast routing information does not exist, check the
setting of the downstream router.
15 Confirm that multicast routing information or multicast
forwarding entry does not exceed the upper limit.
Multicast routing information:
show ip mroute
Multicast forwarding entry:
show ip mcache
netstat multicast
When warning is output, confirm that unexpected multicast
routing information or unexpected multicast forwarding entry
has not been created. If much of the negative cache exists in
multicast forwarding entry, check to see if no terminal
transmitting unnecessary packets exist.
No. Troubleshooting Steps and Command Action