NEC IP8800/S6700, IP8800/S6600, IP8800/S3600, IP8800/S2400, IP8800/S6300 last-hop-router Check Items

3.Troubleshooting Functional Failures in Operation

No.	Troubleshooting Steps and Command	Action
7	Check to see if the unicast route to the multicast data sender	If the unicast route does not exist, see "3.10 IPv6 Unicast
	exists.	Routing Communication Failure."
	show ipv6 route
8	Confirm that PIM is running on the sending interface for the	If IGMP is not running, check the configuration and set the
	unicast route to the multicast data sender.	configuration to run PIM on the sending interface for the
	show ipv6 pim interface	unicast route.
9	Confirm that the PIM-SSM group addresses contain the relay	If the PIM-SSM group addresses do not contain the relay
	target group address, referring to the configuration.	target group address, correct the configuration.
	show running-config
10	Confirm that the multicast relay routing information exists.	If the multicast routing information does not exist, check the
	show ipv6 mroute	setting of the downstream router.
11	Confirm that multicast routing information or multicast	When warning is output, confirm that unexpected multicast
	forwarding entry does not exceed the upper limit.	routing information or unexpected multicast forwarding entry
	Multicast routing information:	has not been created. If much of the negative cache exists in
	show ipv6 mroute	multicast forwarding entry, check to see if no terminal
	Multicast forwarding entry:	transmitting unnecessary packets exist.
	show ipv6 mcache
	netstat multicast

(2) last-hop-router check items

The table below shows the items to be checked when this system is the last-hop-router in the IPv6 PIM-SSM network configuration.

Table 3-45: last-hop-router Check Items

No.	Troubleshooting Steps and Command	Action
1	If the mode of multicast receiver is MLDv1/MLDv2	If the use of PIM-SSM in MLDv1/MLDv2 (EXCLUDE
	(EXCLUDE mode), confirm in the configuration that the use	mode) is not designated, correct the configuration.
	of PIM-SSM in MLDv1/MLDv2 (EXCLUDE mode) is
	designated (ipv6 mld ssm-map enable).
	show running-config
2	If the mode of multicast receiver is MLDv1/MLDv2	If cooperation with PIM-SSM in MLDv1/MLDv2
	(EXCLUDE mode), confirm in the configuration that	(EXCLUDE mode) is not designated, correct the
	cooperation with PIM-SSM in MLDv1/MLDv2 (EXCLUDE	configuration.
	mode) is set for the group address and source address to be
	relayed by PIM-SSM (ipv6 mld ssm-map static).
	show running-config
3	Confirm that MLD is running on the interface connected to the	If MLD is not running, check the configuration and set the
	multicast receiver.	configuration to run MLD.
	show ipv6 mld interface
4	Confirm that MLD warning information is not displayed on	If displayed, take the action against the warning. For details
	the interface connected to the multicast receiver.	on the warning, see "Operation Commands."
	show ipv6 mld interface
5	Confirm that the multicast receiver participates in the relay	If the group does not participate in the relay target group,
	target group via MLD.	check the setting of the multicast receiver.
	show ipv6 mld group
6	Confirm that the source address is registered in the MLD group	If the mode of multicast receiver is MLDv2 (INCLUDE
	information.	mode) and the source address is not registered, check the
	show ipv6 mld group	multicast receiver. If the mode of multicast receiver is
		MLDv1/MLDv2 (EXCLUDE mode), confirm in the
		configuration that cooperation with PIM-SSM is set.
7	If there is an interface in which the relay target group	If this system is not DR, check DR of the relay target interface.
	participates and PIM is running, confirm that this system is
	DR.
	show ipv6 pim interface

86