Troubleshooting mld snooping, Switch fails in layer 2 multicast forwarding, Symptom – H3C Technologies H3C S3100 Series Switches User Manual

Page 337: Analysis, Solution

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Port flags: D-Dynamic port, S-Static port, C-Copy port

Subvlan flags: R-Real VLAN, C-Copy VLAN

Vlan(id):100.

Total 1 IP Group(s).

Total 1 IP Source(s).

Total 1 MAC Group(s).

Router port(s):total 1 port.

Eth1/0/1 (D) ( 00:01:23 )

IP group(s):the following ip group(s) match to one mac group.

IP group address:FF1E::101

(::, FF1E::101):

Host port(s):total 1 port.

Eth1/0/4 (D)

MAC group(s):

MAC group address:3333-0000-0101

Host port(s):total 1 port.

Eth1/0/4

Troubleshooting MLD Snooping

Switch Fails in Layer 2 Multicast Forwarding

Symptom

A switch fails to implement Layer 2 multicast forwarding.

Analysis

MLD snooping is not enabled.

Solution

1) Enter

the

display current-configuration command to view the running status of MLD snooping.

2) If MLD snooping is not enabled, use the mld-snooping command to enable MLD snooping

globally, and then use mld-snooping enable command to enable MLD snooping in VLAN view.

3) If MLD snooping is disabled only for the corresponding VLAN, just use the mld-snooping enable

command in VLAN view to enable MLD snooping in the corresponding VLAN.

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