3. Troubleshooting Functional Failures in Operation

No.

Troubleshooting Steps and Command

Action

 

 

 

5

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, confirm that this system is DR.

 

 

show ip pim interface

 

6

Confirm that IGMP snooping is set to the interface with static

When the IGMP snooping is set, confirm the following:

 

group join function enabled.

• Confirm that the relay port is set as a multicast router port

 

show igmp-snooping

for IGMP snooping.

 

 

• See "3.5.4 Multicast Relay by IGMP snooping Is

 

 

Disabled."

 

 

 

7

Confirm that no interface in abnormal state is detected.

See notices and confirm that warning information is not

 

show ip igmp 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 IGMP version of neighboring router is different.

 

 

Adjust it to the version of IGMP.

 

 

• R: A user who transmitted reports unreceivable at the

 

 

present settings exists. Change the IGMP 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 IGMPv3. 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 IPv4 PIM-SSM network configuration.

Table 3-30: 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 IGMP is running on the interface

If PIM or IGMP is not running, check the configuration and

 

connected to the multicast sender.

set the configuration to run PIM or IGMP.

 

show ip pim interface

 

 

show ip igmp 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 ip mroute

 

 

show netstat multicast

 

3.8.4Multicast Data Is Double-relayed on IPv4 PIM-SSM Network

If multicast data is double-relayed in the IPv4 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:

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NEC IP8800/S3600, IP8800/S6600 manual Multicast Data Is Double-relayed on IPv4 PIM-SSM Network, first-hop-router Check Items
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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.
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