NEC IP8800/S2400 manual Communication on IPv6 PIM-SSM Network Is Disabled, Common Check Items

3. Troubleshooting Functional Failures in Operation

3.11.3Communication on IPv6 PIM-SSM Network Is Disabled

If multicast relay on the IPv6 PIN-SSM network configuration is disabled, isolate the cause according to the failure analysis method below.

The figure below illustrates a network example of IPv6 PIM-SSM.

Figure 3-17: Example of IPv6 PIM-SSM Network

							Multicast
							receiver
				Participation in
				the MLD group
Multicast
sender
		first-hop-router
			last-hop-router
	Multicast
	data
					Participation	in
					the MLD group		Multicast
							receiver

Note

•first-hop-router: This router is directly connected to the multicast sender.

•last-hop-router: This router is directly connected to the multicast receiver.

(1)Common check items

The table below shows the common check items for all system in the IPv6 PIM-SSM network configuration.

Table 3-44: Common Check Items

No.	Troubleshooting Steps and Command	Action
1	Confirm that the use of multicast function is designated (ipv6	If the use of multicast function is not designated, correct the
	multicast routing) in the configuration.	configuration.
	show running-config
2	Confirm that the address of the loopback interface is set in the	If the address of the loopback interface is not set, correct the
	configuration.	configuration.
	show running-config
3	Confirm that PIM is running on one or more interfaces.	If PIM is not running, check the configuration. Set PIM to run
	show ipv6 pim interface	on one or more interfaces.
4	Confirm that MLD snooping is set to the interface with PIM	When MLD snooping is set, confirm the following:
	enabled.	• Confirm that multicast router port for MLD snooping is set
	show mld-snooping	to the ports to which neighboring routers connect.
		• See "3.5.5 Multicast Relay by MLD snooping Is Disabled."
5	Confirm in the configuration that suppression of protocol	If suppression of protocol packet and multicast packet relay is
	packet and multicast packet relay through filtering, etc. is not	provided, correct the configuration.
	provided on the interface that allows PIM and MLD to run.
	show running-config
6	Check the PIM neighboring information.	If the neighboring router is not displayed, check the
	show ipv6 pim neighbor	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.

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