Switching
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XS728T ProSAFE 28-Port 10-Gigabit L2+ Smart Switch
Querier VLAN Status
To view the operational state and other information for IGMP snooping queriers for
VLANs on the network:
Select Switching> Multicast > IGMP Snooping Querier > Querier VLAN Status.
The following table describes the information available on the Querier VLAN Status screen.
MLD Snooping
MLD is a protocol used by IPv6 Multicast routers to discover the presence of multicast
listeners (nodes wishing to receive IPv6 multicast packets) on its directly attached links and
to discover which multicast packets are of interest to neighboring nodes. MLD is derived from
IGMP; MLD version 1 (MLDv1) is equivalent to IGMPv2, and MLD version 2 (MLDv2) is
equivalent to IGMPv3. MLD is a sub protocol of Internet Control Message Protocol version 6
(ICMPv6), and MLD messages are a subset of ICMPv6 messages, identified in IPv6 packets
by a preceding Next Header value of 58.
The switch can snoop on both MLDv1 and MLDv2 protocol packets and bridge IPv6 multicast
data based on destination IPv6 multicast MAC addresses. The switch can be configured to
perform MLD snooping and IGMP snooping simultaneously.
The MLD snooping link contains features described in the following sections:
• Configuration
• MLD VLAN Configuration
• Multicast Router VLAN Configuration
• Querier Configuration
• Querier VLAN Configuration
Field Description
VLAN ID Specifies the VLAN ID on which the IGMP snooping querier is
administratively enabled and for which VLAN exists in the VLAN database.
Operational State Specifies the operational state of the IGMP snooping querier on a VLAN:
• Enabled. 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 sees a better
querier (numerically lower) in the VLAN, it moves to non-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, when the querier address is not configured, or
the network management address is not configured.
Operational Version Displays the IGMP protocol version of the operational querier.
Operational Max Response
Time
Displays the maximum response time used in the queries that are sent by
the snooping querier.
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