User Manual

Configure Switching
154
Insight Managed 8-Port Gigabit Ethernet Smart Cloud Switch with 2 SFP Fiber Ports
The System Information page displays.
5. Select Switching> Multicast > IGMP Snooping Querier > Querier VLAN Status.
The Querier VLAN Status page displays.
6. To refresh the page with the latest information about the switch, click the Refresh button.
The following table describes the nonconfigurable information displayed on the page.
Configure MLD Snooping
In IPv4, Layer 2 switches can use IGMP snooping to limit the flooding of multicast traffic by
dynamically configuring Layer 2 interfaces so that multicast traffic is forwarded to only those
interfaces associated with IP multicast address. In IPv6, MLD snooping performs a similar
function. With MLD snooping, IPv6 multicast data is selectively forwarded to a list of ports
that want to receive the data, instead of being flooded to all ports in a VLAN. This list is
constructed by snooping IPv6 multicast control packets.
MLD Snooping Overview
Multicast Listener Discovery (MLD) is a protocol used by IPv6 multicast routers to discover
the presence of multicast listeners (nodes that must receive IPv6 multicast packets) on its
directly attached links and to discover which multicast packets are of interest to neighboring
Table 43. Querier VLAN Status information
Field Description
VLAN ID The VLAN ID on which IGMP snooping querier is enabled.
Operational State The operational state of the IGMP snooping querier on a VLAN. It can be in
any of the following states:
• Querier. The snooping switch is the querier in the VLAN. The snooping
switch sends out periodic queries with a time interval equal to the
configured querier query interval. If the snooping switch finds a better
querier in the VLAN, it moves to non-querier mode.
• Non-Querier. The snooping switch is in non-querier mode in the VLAN.
If the querier expiry interval timer expires, the snooping switch moves
into querier mode.
• Disabled. The snooping querier is not operational on the VLAN. The
snooping querier moves to disabled mode when IGMP snooping is not
operational on the VLAN or when the querier address is not configured
or the network management address is also not configured.
Operational Version The operational IGMP protocol version of the querier.
Last Querier Address The IP address of the last querier from which a query was snooped on the
VLAN.
Last Querier Version The IGMP protocol version of the last querier from which a query was
snooped on the VLAN.
Operational Max Response Time The maximum response time to be used in the queries that are sent by the
snooping querier.