Check Items When Double-relay Continues

3. Troubleshooting Functional Failures in Operation

Table 3-27: Check Items When Double-relay Continues

No.	Troubleshooting Steps and Command	Action

1	Check the PIM neighboring information on the interface of the	If the neighboring router is not displayed, check the
	network having multiple routers.	following:
	show ip pim neighbor	• Confirm that PIM is running on the interface connected to
		the neighboring router using the show ip pim
		interface command.
		• Confirm in the configuration that suppression of protocol
		packet relay by filtering, etc. is not provided.
		• Verify the settings of the neighboring router.

3.8.3Communication on IPv4 PIM-SSM Network Is Disabled

If multicast relay on the IPv4 PIN-SSM network configuration is disabled, isolate the cause according to the failure analysis method below.

The figure below illustrates a network example of IPv4 PIM-SSM.

Figure 3-12: Example of IPv4 PIM-SSM Network

Multicast

receiver

Participation in

the IGMP group

Multicast

sender

first-hop-router

last-hop-router

Multicast

data

Participation

the IGMP 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 IPv4 PIM-SSM network configuration.

Table 3-28: Common Check Items

No.	Troubleshooting Steps and Command	Action

1	Confirm that the use of multicast function is specified (ip	If the use of multicast function is not designated, correct the
	multicast routing) in the configuration.	configuration.
	show running-config
2	Confirm that PIM is running on one or more interfaces.	If PIM is not running, check the configuration. Set PIM to run
	show ip pim interface	on one or more interfaces. If the interface set in the
		configuration to run PIM is not displayed by the show ip
		pim command with "interface" parameter specified, confirm
		that multi-homing is not set on the interface.

IP8800/S6700, IP8800/S3600, IP8800/S6600, IP8800/S6300, IP8800/S2400 specifications

The NEC IP8800 series comprises a range of advanced networking solutions designed for various applications ranging from enterprise networking to service provider environments. This series includes models such as the IP8800/S2400, IP8800/S3600, IP8800/S6300, IP8800/S6600, and IP8800/S6700, each with its unique set of features and capabilities aimed at delivering robust performance, security, and scalability.

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In summary, the NEC IP8800 series offers a versatile range of switches that combine advanced technologies, high performance, and robust security features, catering to various networking needs across different industries. Each model is designed to provide not only superior connectivity but also the flexibility and scalability required in today’s fast-paced digital landscape.

NEC IP8800/S6300 manual Communication on IPv4 PIM-SSM Network Is Disabled, Common Check Items

Models: IP8800/S6700 IP8800/S3600 IP8800/S6600 IP8800/S6300 IP8800/S2400

3. Troubleshooting Functional Failures in Operation

Table 3-27: Check Items When Double-relay Continues

Troubleshooting Steps and Command

3.8.3Communication on IPv4 PIM-SSM Network Is Disabled

The figure below illustrates a network example of IPv4 PIM-SSM.

Figure 3-12: Example of IPv4 PIM-SSM Network

Multicast

sender

first-hop-router

last-hop-router

data

(1)Common check items

Table 3-28: Common Check Items

Troubleshooting Steps and Command

on one or more interfaces. If the interface set in the

IP8800/S6700, IP8800/S3600, IP8800/S6600, IP8800/S6300, IP8800/S2400 specifications