First-hop-router Check Items, For MLD snooping

3. Troubleshooting Functional Failures in Operation

No.	Troubleshooting Steps and Command	Action

8	Check to see if IGMP snooping is set to the port in which static	When MLD snooping is set, confirm the following:
	group join function is running.	• Chec to see if the forwarding port is set as a multicast port
	show mld-snooping	for MLD snooping
		• See "3.5.5 Multicast Relay by MLD snooping Is Disabled."
9	Confirm that no interface in abnormal state is detected.	See notices and confirm that warning information is not
	show ipv6 mld interface	output. When warning information is output, check the
		following:
		• L: The number of join request exceeded expected
		maximum number. Check to see the number of connected
		users.
		• Q: The MLD version of neighboring router is different.
		Adjust it to the MLD version.
		• R: A user who transmitted reports unreceivable at the
		present settings exists. Change the MLD version of this
		system or confirm the setting of the participant.
		• S: Some of the participant information are being discarded
		because the number of source exceeded the upper limit
		defined to store source per message in MLDv2. Check the
		settings of the participant.

(3) first-hop-router check items

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

Table 3-46: first-hop-router Check Items

No.	Troubleshooting Steps and Command	Action

1	Confirm that this system is directly connected to the multicast	If not, check the network configuration.
	sender.

2	Confirm that PIM or MLD is running on the interface	If not running, check the configuration and set the
	connected to the multicast sender.	configuration to run PIM or MLD.
	show ipv6 pim interface
	show ipv6 mld interface
3	Check to see if multicast data arrives at this system.	If multicast data has not arrived, check the setting of the
		multicast sender.

4	Check to see if the group address and source address in	If the group address and source address do not match, check
	multicast data match those in the multicast routing	the settings of the multicast sender and last-hop-router.
	information.
	show ipv6 mroute
	show netstat multicast

3.11.4Multicast Data Is Double-relayed on IPv6 PIM-SSM Network

If multicast data is double-relayed in the IPv6 PIM-SSM network configuration, check the settings of each router and set the configuration to run PIM on the interface for a network having multiple routers.

If double-relay still continues, check the following:

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.

The IP8800/S2400 is an entry-level switch tailored for small to medium enterprises. It features a compact design and high port density, making it ideal for network edge applications. The model supports both Layer 2 and Layer 3 switching capabilities, enabling efficient traffic management. With its robust security features, including access control lists and support for VLANs, the IP8800/S2400 ensures secure connectivity.

Moving to the IP8800/S3600, this switch is designed for data center environments and offers high throughput with advanced routing capabilities. It is equipped with high-capacity 10G and 40G Ethernet ports, facilitating faster data transfer rates. The S3600 supports various protocols such as MPLS and Segment Routing, enhancing its ability to manage complex network architectures. Its energy-efficient design also helps reduce operational costs.

The IP8800/S6300 is tailored for high-performance networking scenarios, featuring a flexible architecture that supports both traditional and cloud-based services. With extensive QoS capabilities, the S6300 optimizes traffic flow and manages bandwidth efficiently, ensuring high-quality service delivery. Its virtualization support allows for easier integration into modern, software-defined networking environments.

The IP8800/S6600 provides a comprehensive solution for service providers and large enterprises, boasting high scalability and modularity. This model supports advanced features such as network slicing and the ability to handle high-density 100G interfaces. Its robust management tools, including centralized control and automation capabilities, simplify network operations significantly.

Finally, the IP8800/S6700 represents the pinnacle of the series, designed for mission-critical applications requiring the utmost reliability and performance. It supports advanced analytics, AI-driven insights, and comprehensive telemetry, enabling proactive network management. With high availability features and extensive redundancy options, the S6700 ensures continuous operation, making it ideal for core network functions.

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 Multicast Data Is Double-relayed on IPv6 PIM-SSM Network, For MLD snooping

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

group join function is running.

for MLD snooping

show ipv6 mld interface

(3) first-hop-router check items

Table 3-46: first-hop-router Check Items

Troubleshooting Steps and Command

show ipv6 pim interface

show ipv6 mld interface

3.11.4Multicast Data Is Double-relayed on IPv6 PIM-SSM Network

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