Troubleshooting Igmp Snooping - Huawei Quidway S3100 Series Operation Manual

Operation Manual – IGMP Snooping
Quidway S3100 Series Ethernet Switches
[Switch B-Ethernet 1/0/1] port hybrid vlan 2 10 untagged
[Switch B-Ethernet 1/0/1] port hybrid pvid vlan 2
[Switch B-Ethernet 1/0/1] quit
# Define the Ethernet 1/0/2 port as a hybrid port, add the port to VLAN 3 and VLAN 10,
and configure the port to exclude VLAN tags in its outbound packets for VLAN 3 and
VLAN 10, and set VLAN 3 as the default VLAN of the port.
[Switch B] interface Ethernet 1/0/1
[Switch B-Ethernet 1/0/2] port link-type hybrid
[Switch B-Ethernet 1/0/2] port hybrid vlan 3 10 untagged
[Switch B-Ethernet 1/0/2] port hybrid pvid vlan 3
[Switch B-Ethernet 1/0/2] quit

1.5 Troubleshooting IGMP Snooping

Symptom: Multicast function does not work on the switch.
Solution:
The reason may be:
1) IGMP Snooping is not enabled.
Use the display current-configuration command to check the status of IGMP
Snooping.
If IGMP Snooping is disabled, check whether it is disabled globally or on the
corresponding VLAN. If it is disabled globally, use the igmp-snooping enable
command in both system view and VLAN view to enable it both globally and on the
corresponding VLAN. If it is only disabled on the VLAN, use the igmp-snooping
enable command in VLAN view to enable it on the corresponding VLAN.
2) Multicast forwarding table set up by IGMP Snooping is wrong.
Use the display igmp-snooping group command to check if the multicast groups
are expected ones.
If a multicast group created by IGMP Snooping is not correct, contact your
technical support personnel.
Continue with solution 3) if the second step does not work.
If it is not the reason, the possible reason may be:
3) Multicast forwarding tables do not match.
Use the display mac-address vlan vlanid command in any view to check if the
MAC multicast forwarding table established under the specified VLAN is
consistent with that established by IGMP Snooping.
If they are not consistent, contact your technical support personnel.
Huawei Technologies Proprietary
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Chapter 1 IGMP Snooping Configuration