3com S7906E Instruccion De Instalación

 

1-35 

When Host A leaves the IPv6 multicast group, it sends an MLD done message to Switch A. Receiving 

the message, Switch A removes port GigabitEthernet 2/0/3 from the member port list of the forwarding 

entry for the group; however, it does not remove the group or forward the done message to Router A 

because Host B is still in the group. Use the display mld-snooping group command to display 

information about MLD snooping multicast groups. For example:  

# Display information about MLD snooping multicast groups on Switch A. 

[SwitchA] display mld-snooping group 

  Total 1 IP Group(s). 

  Total 1 IP Source(s). 

  Total 1 MAC Group(s). 

  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. 

            GE2/0/1                (D) 

    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. 

            GE2/0/4                (D) 

    MAC group(s): 

      MAC group address:3333-0000-0101 

          Host port(s):total 1 port. 

            GE2/0/4 

Troubleshooting MLD Snooping  

A switch fails to implement Layer 2 multicast forwarding.  

MLD snooping is not enabled. 

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.