Operation Manual – Multicast
H3C S3100 Series Ethernet Switches Chapter 2 IGMP Snooping Configuration
2-23
[SwitchB-Ethernet1/0/10] port link-type hybrid
[SwitchB-Ethernet1/0/10] port hybrid vlan 2 3 10 tagged
[SwitchB-Ethernet1/0/10] quit
# Define Ethernet 1/0/1 as a hybrid port, add the port to VLAN 2 and VLAN 10,
configure the port to forward untagged packets for VLAN 2 and VLAN 10, and set VLAN
2 as the default VLAN of the port.
[SwitchB] interface Ethernet 1/0/1
[SwitchB-Ethernet1/0/1] port link-type hybrid
[SwitchB-Ethernet1/0/1] port hybrid vlan 2 10 untagged
[SwitchB-Ethernet1/0/1] port hybrid pvid vlan 2
[SwitchB-Ethernet1/0/1] quit
# Define Ethernet 1/0/2 as a hybrid port, add the port to VLAN 3 and VLAN 10,
configure the port to forward untagged packets for VLAN 3 and VLAN 10, and set VLAN
3 as the default VLAN of the port.
[SwitchB] interface Ethernet 1/0/2
[SwitchB-Ethernet1/0/2] port link-type hybrid
[SwitchB-Ethernet1/0/2] port hybrid vlan 3 10 untagged
[SwitchB-Ethernet1/0/2] port hybrid pvid vlan 3
[SwitchB-Ethernet1/0/2] quit
2.5 Troubleshooting IGMP Snooping
Symptom: Multicast function does not work on the switch.
Solution:
Possible reasons are:
1) IGMP Snooping is not enabled.
z Use the display current-configuration command to check the status of IGMP
Snooping.
z If IGMP Snooping is disabled, check whether it is disabled globally or in the
specific 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 at the same time. If it is only disabled on the corresponding
VLAN, use the igmp-snooping enable command in VLAN view only to enable it
on the corresponding VLAN.
2) Multicast forwarding table set up by IGMP Snooping is wrong.
z Use the display igmp-snooping group command to check if the multicast groups
are expected ones.
z If the multicast group set up by IGMP Snooping is not correct, contact your
technical support personnel.
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