Configuring Switching
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S3300 Smart Managed Pro Switch
MLD VLAN Configuration
MLD snooping can be enabled on a per VLAN basis. It is necessary to keep track of the
interfaces that are participating in a VLAN in order to apply or remove configurations.
To configure the MLD VLAN:
1. Select Switching> Multicast > MLD Snooping > MLD VLAN Configuration.
2. In the VLAN ID field, specify the on which MLD snooping is enabled.
3. In the Admin Mode list, select Enable.
4. In the Fast Leave Admin Mode list, enable or disable the MLD snooping fast leave mode for
the specified VLAN.
If fast leave is enabled, the VLAN can be immediately removed from the layer 2
forwarding table entry when the switch receives an MLD leave message for a multicast
group without first sending out MAC-based general queries.
5. In the Group Membership Interval field, specify the number of seconds the VLAN should to
wait for a report for a particular group on the VLAN before the MLD snooping feature deletes
the VLAN from the group.
6. In the Maximum Response Time field, specify the number of seconds the VLAN should wait
after sending a query if does not receive a report for a particular group. The specified value
should be less than the group membership Interval.
7. In the Multicast Router Expiry Time field, specify the number of seconds the VLAN should
wait to receive a query before it is removed from the list of VLANs with multicast routers
attached.
8. Click the Add button.
To disable MLD snooping on a VLAN:
1. Select the check box next to each VLAN on which MLD snooping should be disabled.
2. Click the Delete button.
Multicast Router Configuration
In addition to building and maintaining lists of multicast group memberships, the snooping
switch also maintains a list of multicast routers. When forwarding multicast packets, they
should be forwarded on ports that have joined using MLD/IGMP and also on ports on which
multicast routers are attached. In MLD/IGMP, there is only one active querier. This means
that all other routers on the network are suppressed and are not detectable by the switch. If a
query is not received on an interface within a specified length of time (multicast router present
expiration time), then that interface is removed from the list of interfaces with multicast
routers attached. The multicast router present expiration time is configurable via
management. The default value for the multicast router expiration time is zero, which
indicates an infinite time-out, that is, no expiration.
To configure the Multicast Router:
1. Select Snooping > Multicast Router Configuration.
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