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HP 5920 series Configuration Manual: Troubleshooting Igmp Snooping; Layer 2 Multicast Forwarding Cannot Function; Multicast Group Filter Does Not Work

Ip multicast.
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Total 1 entries.
VLAN 100: Total 1 entries.
(0.0.0.0, 224.1.1.1)
Host slots (0 in total):
Host ports (2 in total):
XGE1/0/3
XGE1/0/5
The output shows that Ten-GigabitEthernet 1/0/3 and Ten-GigabitEthernet 1/0/5 on Switch C have
become static member ports of the multicast group 224.1.1.1.

Troubleshooting IGMP snooping

Layer 2 multicast forwarding cannot function

Symptom
Layer 2 multicast forwarding cannot function on the switch.
Analysis
IGMP snooping is not enabled.
Solution
Use the display igmp-snooping command to display IGMP snooping status.
1.
If IGMP snooping is not enabled, use the igmp-snooping command in system view to enable IGMP
2.
snooping globally, and then use the igmp-snooping enable command in VLAN view to enable
IGMP snooping for the VLAN.
If IGMP snooping is enabled globally but not enabled for the VLAN, use the igmp-snooping enable
3.
command in VLAN view to enable IGMP snooping for the VLAN.

Multicast group filter does not work

Symptom
Hosts can receive multicast data from multicast groups that are not permitted by the multicast group filter.
Analysis
The ACL is incorrectly configured.
The multicast group filter is not correctly applied.
The function of dropping unknown multicast data is not enabled, so unknown multicast data is
flooded.
Solution
Use the display acl command to verify that the configured ACL satisfies the multicast group filter
1.
requirements.
Use the display this command in IGMP-snooping view or in a corresponding interface view to
2.
verify that the correct multicast group filter has been applied. If not, use the group-policy or
igmp-snooping group-policy command to apply the correct multicast group filter.
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Troubleshooting

This manual also for:

5900 series

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